Gm exciter wire on alternator. You can get a one wire regulator that will excite easier.

Gm exciter wire on alternator Nov 26, 2021 · The wire on the threaded stud on the alternator is the charge wire. 5W bulb) comes on The GM 2-wire alternator is a popular choice in many vehicles and offers a simple and efficient design. To keep it simple, stick with wherever the bat wire is already going but ensure wire gauge is adequate. Mar 16, 2019 · If your going from a 10si to cs130 you can get acd #PT2145/GM#88861073 It has sensing wire and exciter wire. 4. Dec 3, 2016 · Buy New 120A Self Exciting One Wire Alternator Compatible with GM/Delco Type 10SI with LOW SPEED Turn on for Race/Rods 305 350 BBC and SBC Chevy Rods! Super low Cut in 1965-1985 7127NSE-120A RA00113: Alternators - Amazon. This would be a 2-wire setup. May 27, 2021 · But in modern vehicles, the alternators have regulators, and most don’t require an exciter wire to function. Feb 3, 2019 · The main red wire on the alternator harness/plug has power both on and off. ive searched the internet but i cant find any good clean instructions on how to do this Aug 10, 2007 · The alternator is a 3-wire style. Aug 16, 2023 · Installing a two-wire alternator can be a daunting task, particularly if you’re unfamiliar with the wiring connections and the installation process. Apr 29, 2008 · with the key in run, and the engine running, power (+12v) will still go from the "ign switch" to the light, however, if the alternator is generating current, it's field wire will have a voltage applied to and that voltage will show up at the #1 tab on the alternator. The reason is pretty simple; it wants to know if the charging voltage is reaching the fuse box. If it is truly a proper made 3 wire alternator. A GM One Wire has a voltage regulator that contains circuitry that uses the residual magnetism in the alternators rotor fields to determine when to turn the alternator on and off. Run the red alternator power (58) wire to terminal 2 on your GM alternator. 94-95 Z-28 Camaros came from the factory with a one wire alternator (actually it's two wire since it has an idiot light). Mar 6, 2023 · 3. Ignition switched power runs from the "Alternator Lamp +" terminal at the back of the cluster to the 4 pin connector for the ignition switch. Nov 18, 2011 · I put a D1105 in my 642b. Understanding the key components and their functions can help in diagnosing and troubleshooting any issues that may arise. Sep 20, 2020 · The alternator I now have is brand new 3-wire Delco GM. The exciter wire had zero volts off, and only 0. Unless you have it in a powder coated bracket. This is not a 1-wire alternator with an internally switched exciter. (~13. If the B+ connection in an alternator is not working, the alternator will not be able to supply power to the battery and the electrical system of the vehicle. Any idea on a solution? Feb 24, 2020 · The original 1960’s GM alternator employs an external voltage regulator. 3125 in. FYI: the burb is a 1990. If you are using a coil with external ballast resistor connect this wire to the battery side or key switch side of How To Wire Alternator 12-VOLT NEGATIVE GROUND 3 WIRE INSTRUCTIONS www. Nov 16, 2023 · A diode is used in the alternator excitation wire. length Jun 15, 2022 · GM 1 Wire Alternator Chrome New Self Exciting High Output 105A One wire 10SI Sbc Compatible with Chevy 350 305 DELCO Street Rod 1100125 ADR0335C 40012395 7127SECN100A 7127-SE105C GM 1 Wire Alternator Self Exciting New Delco one wire 10SI SBC BBC 63A Replacement for Chevy 350 GM Ford 334-2614 1100125 ADR0325 40012370 7127SEN Replace Older Equipment Jan 15, 2014 · One wire will not need to have the exciter wire. Joined Jul 9, 2014 Messages 140 Understanding the functionality and proper installation of the GM 3 wire alternator plug is essential for maintaining a reliable and efficient electrical system in your vehicle. It isn’t charging. You can convert the alternator to one wire by replacing its regulator with a self-exciting regulator A 2 wire alternator is a simplified version of an alternator that uses only two wires to function: one wire for power and one for ground. thanks. With out it the alternator would not start charging. However, in a real sense, only 2 wires are going in and out: the positive battery wire and the exciter wire. 8 out of 5 stars. This self-exciting voltage regulator only needs to see a certain engine rpm to connect the battery to the regulator and begin charging. This wire is usually labeled with a “+” symbol or has a red plastic cover. vintageautogarage. As a dealer tech, I still own a small "CS" alternator tester with LED's and connectors. pretty sure it needs an exciter wire. I have both of my batteries connected in parallel like yours and the second alternator is a simple GM 1-wire connected directly to the positive on the first battery. Materials Needed for Wiring a 1 Wire GM Alternator. Through my reading I discovered that there's a #1 and #2 connector and that #2 is an exciter wire that should be connected to the main output terminal with a short wire. It still has the voltage reg and wiring from it and the new spliced wiring for the alternator. A one-wire alternator doesn’t use the two-wire connector which supplies electrical current to facilitate use of the idiot light. An alternator is an auto part that transmits power from the fuel system to the battery for operating vehicle accessories, such as the radio, headlights and air conditioning fans. You probaly need the GM internial regulated,or is that how they riged it. The problem is the exciter wire stays on with a full 12. Now the alternator will not be dependent on reaching a certain turn on RPM. The regulator does this by sensing the RPM the alternator is turning, when it gets to a certain rpm the voltage regulator Apr 13, 2012 · Some one wire alternators can be hooked up as a three wire. As you may now, the #2 terminal lead needs to be connected to charge, unless it’s already internally connected which is not the case here. If you don't have an exciter wire you will not show a charge on your volt meter until your battery needs to charge, that usually doesn't happen until you rev it the first time. Click to expand Thanks! I'm installing an Ez-wiring harness in my 50 chevy. If that wire is already there, I see no excuse for a one wire alternator! Jan 8, 2018 · im pretty comfortable with automotive wiring, and GM wiring in particular, I hope this is a easy issue. Now, back to reality, you really only need two wires for a 12-SI or CS130, the main battery wire and the exciter wire. com FREE DELIVERY possible on eligible purchases Sep 23, 2024 · The earlier 10SI and 12SI needs the "I" wire. Get this power from the ignition switch, when the key is in the run and crank position you should have power. May 18, 2020 · In addition, I believe the factory harness also had a diode in the brown exciter wire (somewhere in IP harness). Oct 13, 2016 · Alternator exciter wire issues. Mice have had their way as well. Oct 19, 2014 · So i solved the ignition problem i was having in my truck, turns out it was a bad switch, and i am guessing the tach got fried from the signal wire accidently touching a 12v source, however after connecting the alternator up again, the alternator exciter coil is connected through the same switch as the distributor and tach power, when the switch is flipped on ignition kicks on, tach powers up Oct 18, 2024 · HI Everyone, i have a 1947 farmall M with a delco alternator. The sense wire came all the way from the starter junction from OEM, with the idea it would be more accurate from that distance to "sense" voltage drop, I. Attachment 2002201 Attachment 2002209 May 14, 2011 · The Ford 3G alternator that uses the separate exciter wire is considered a load sensing alternator, that is, it responds to the load on the electrical system and will charge the battery as required. Attachment 1866108 Mar 2, 2020 · The GM alteRnator on the NAA will not charge after the recent wiring shorts caused by rodents. Two-wire Alternator: Most standard and all self-exciting regulator alternators will work using the two wire setup. com FREE DELIVERY possible on eligible purchases Mar 17, 2005 · It's the only wire you would need to add for a multiple wire 1970's-80's GM alt, as the third wire is the one you can just run straight from its terminal to the battery hookup terminal right on the alternator. com FREE DELIVERY possible on eligible purchases Jul 15, 2021 · But I thought the 10SI needed the exciter voltage from the ignition switch (Brown Wire) to get it started charging and also a sense connections (Small Red wire). These connections provide the necessary power and control signals to the alternator. An excite wire. I used a marker light from the parts store in the system. ECU excites the alternator to supply the charge. Mine required a switched 12 volt source to the exciter wire. 5v from my alternator. Sep 20, 2021 · 2 batteries and 2 alternators. com FREE DELIVERY possible on eligible purchases Run the white alternator exciter (44) wire to the 1 terminal on your GM alternator. All the exciters in all the GM trucks use a resistance wire to excite the alternator The magneto is independent of the tractor electrical system and so polarity is not an issue. AC Tap: Yes. Also, is this a 100 or 145 amp?I did look for a powermaster but could not find a 244 one wire. O. 3 Powerstroke Troubleshooting Common Issues in One Wire Alternator Wiring. Oct 14, 2012 · Actually no it won't. Understanding the Basics of the GM 2-Wire Alternator. Basically on and off. This design makes installation and wiring much easier compared to a traditional 3 wire alternator that requires additional connections for voltage sensing and battery sensing. just going through my car and thought id share what the dummy light does and how to hook it upit excites the alternator when the key is turned ON and is resi Nov 30, 2020 · The brown wire from the firewall is the exciter wire from the ignition switch, and it shows the resistor wired inline to the L terminal and the other S wire comes from the man junction. I then checked the voltage at each of the wires coming from the idiot light. The GM 2-wire alternator has two main connections: the battery connection and the ignition connection. The only low voltage wire on the tractor which is associated with the magneto is to kill the engine which is done by grounding the non-grounded side of the points in the mag, therefore preventing it from creating spark. All one wire alt’s dont need an “exciter wire” but some give the ability to plug in the factory alt connector so your gen light will pop on when you key forward and go out when the car starts so it acts like the factory alt. I plan to rewire everything. 99. This tiny bit of power to light the globe is all that us needed to get the alternator going once the engine is running. # wire is a bit different, red lug goes to Nov 22, 2021 · A bit of research indicated using an arbitrary 470 ohm resistor to drop the voltage seen on the exciter wire with little explanation why 470 ohms specifically and a lot of people seemed to be parroting information, but for the sake of the exercise I decided to try it with another brand new genuine GM alternator. 76. You only need to connect the battery wire (one-wire). May 1, 2007 · Just to make sure I understand, I will take the wire labeled EXCITER to the F terminal. Nov 2, 2012 · In some cases, the GM 10SI and 12SI alternators backfeed through the regulator excitation wire, not allowing the engine to be shutoff with the ignition switch ; Kit allows you to stop alternator backfeeding by installing this diode inline on the ignition switched wire going to the regulators pin #1 › See more product details Key Components of a GM Alternator and their Functions. My understanding is that this means that it isnt getting excited by the D+ circuit, which is supposed to come from a switched source. Oct 24, 2023 · Auto Alternator Wiring Diagram: What Wires Go Where? If you consider a standard GM alternator with an inbuilt regulator, most people refer to it as a three-wire alternator. Aug 22, 2019 · GM 1 Wire Alternator Self Exciting New Delco one wire 10SI SBC BBC 63A Replacement for Chevy 350 GM Ford 334-2614 1100125 ADR0325 40012370 7127SEN Replace Older Equipment NEW ALTERNATOR HIGH OUTPUT compatible with CHEVY ONE 1 WIRE 120 AMP DELCO 10SI SELF-EXCITING Nov 29, 2023 · A simple method for restoring the charging system on your old 1960s-1980s GM car or truck, or how to wire an AC Delco alternator to your marine boat or farm Nov 18, 2021 · In addition to the alternator itself, you will need the correct size output wire, fuse, exciter plug along with the correct alternator bracket to adapt to the engine. Even the 3 wire alternators will charge if you start the engine and rev it to about 2000-2500 RPMs. I?m sure it may have been covered but my searches are coming up short. If You will notice, the Crank-Pulley on the average large Engine is very close to ~8-inches in diameter, but the Alternator-Pulley is only in the range of ~2-inches in diameter, this creates a ~4-to-1 RPM increase compared to the Crankshaft RPM. Today I am going to track where the voltage regulator wire goes an see if that is the issue Need to install diode on white wire on alternator Jun 21, 2019 · By removing fuses I have traced it to the alternator excite feed wire from the ignition switch. Then just run the BAT terminal to battery (+), starter solenoid or firewall junction. Dec 3, 2011 · The exciter wire, (white one) works like this, when the key is switched on, it tells the alternator the ign switch is live and ready. Posted by Sterling Jun 15, 2020 · So I then installed a entirely new alternator. Thread starter GbaeBaldwin; Start date Oct 12, 2016; G. May 29, 2020 · Sorry guys, my memory is a little fuzzy. 4 b230f Thanks Jul 18, 2020 · Asked GM to confirm: The single harness wire (with four pin alternator connector) is a plug and play for this alternator (aka alternator does not need a jumper from alternator stud to vacant alternator pin or resistor). The #2 sensory wire should go to the relay, or main voltage distribution point, to allow the alternator to provide +/- 14. Joined Oct 10, 2016 Location Ottawa Lk. Jul 4, 2018 #9 K. I replaced the connector to the regulator still a draw. I am using the kubota alternator that goes with the diesel, so I would think yours would be the same. Before that the alternator doesnt put out. it has the internal regulator. This alternator plug-pigtail incorporates a Weather Pack style seal and an in-line resistor that allows, but does not require, a charge light in this exciter circuit. The positive battery wire is larger in diameter and red in color. It should be powered from a switched source. Identify this terminal on the alternator as it will be used for wiring purposes. I’ve wired it correctly the same as my old one which ran for years like it . So if the alternator doesn't see this signal, it just resorts to fail-safe mode, which is somewhere around 13. Jul 8, 2021 · The signal that controls the alternator is a proprietary PWM signal that is outlined by GM. 4 volts to the system, not just to the rear of the alternator. length Needs to be terminated to a Sep 26, 2012 · "If the picture is the alternator your using it wont work, that an old GM externial regulated alternator. AC generator exciter The AC generator exciter system consists of an AC alternator and a thyristor rectifier bridge directly connected to the main AC generator. Jun 16, 2020 · The exciter wire is blacked out as it leaves the alternator plug, so that little bit of wire going into your flex loom isn't as noticeable. Can I run this thing 1-wire without the Field#1 connection? Maybe I have the wrong alternator. What excites the alternator? GM response: Harness is plug and play. I naver ran an exciter wire until i bought the Pusher from rocky and it had an exciter wire on it. Wiring a two-wire alternator requires the knowledge of a GM 2 wire alternator wiring diagram. Brushless Design: Mar 2, 2022 · Buy For Mini One Wire Alternator Replacement for GM 1 Wire SBC BBC For Chevy Race 87-92 Chrome 12180-SEN, 1-2119-11ND: Alternators - Amazon. Apr 19, 2014 · Hi, I'm currently wiring in my 4 post Moroso disconnect switch on my street/strip duty mustang with 3g alt and am wondering if exciter/field wire can always be hot with switch left on or if I should install a keyed relay to keep it from draining the battery. The output wire insists in returning feedback to the alternator from the battery ONLY when #2 terminal is connected to alternator + post. This stops the exciter back feeding when the ignition is switched off. on a GM 3 Wire Alternator, is the idiot light on the exciter wire from the ignition necessary or can it just be wired straight? can't remember if the lamp played some role. Jul 1, 2016 · Whether you’re looking for a simple aftermarket replacement or a heavy-duty performance alternator, Speedway Motors offers three main types of alternators that GM originally designed. Feb 29, 2020 · GM alternators require an exciter wire with a 12V switched source, otherwise they won't charge. The three wires required for the GM 3-wire alternator are the main power wire, the exciter wire, and the sensing wire. 5 volts at idle) The harness still has the two cut wires taped off from the 3 wire alternator. I wired the ignition light (supplied with a switch panel that was purchased for this boat) into the alternator EXC wire in this fashion: Key-on power to the + side of the light, and the - side of the light to the EXC post on the alternator. 1. Aug 17, 2021 · I have bought a new 3 wire gm si series alternator. The 3 wire alternator wiring diagram is not as complex as it seems, as only two additional wires are integrated into the rest of the electrical system and the alternator . Single Groove V-Belt PulleyFan JEGS 1-Wire Alternators:One-wire alternators have a turn-on point (sometimes called "cut in"), typically about 1200 engine RPM. This alternator (10-DN), uses a flat, two-prong connection at the back of the alternator. D. I'm sure other GM vehicles from this time period and newer have the same scheme. -18 ( . Each wire serves a specific purpose and must be connected correctly for the alternator to function Mar 9, 2022 · Delco alternator 10Si and 12Si alternator excit wire plug with diode Ready to plug into '73 & up GM internally regulated alternator Special diode prevents engine run and voltage feedback White wire length: 100CM; Red wire length: 20CM Jul 9, 2014 · The one wire is the exciter wire. . When you turn your ignition on, there is 12 volts supplied to the globe. I have alternator wired correctly and it still behaves like a one wire conversion. Jul 8, 2021 · The exciter wire runs from the exciter terminal on the alternator to the "Alternator Lamp -" terminal at the back of the instrument cluster, noting else connected at either end of this wire. I am not running the warning light Don. There will be a fusible link on the starter end of the cable. One wire alternator wiring can sometimes present troubleshooting challenges. May 30, 2015 · Put it all back together and after 5 min with the battery hooked up noticed a little smoke again from the alternator. The main power wire is connected directly to the positive terminal of the battery, providing the electrical power generated by the alternator. The 1-wire, which is great choice for a clean setup and easy installation, the 3-wire OEM-style replacement, or the earliest style externally regulated alternator. Only way to stop it is to disconnect the battery or pull the exciter wire off the alternator. I Re: Alternator Wiring CS130 08-28-04 09:41 AM - Post# 503468 In response to babydeuce Ok well that gm adapter with the resistance in it was 48 bucks CDN and two days away, so i got the generic one from the parts store, went to Radio Shack and got a pack of resistors with 10, 22, 33, and 47 ohm resistors, i had a wire coming from the dash to the old alternator, this was the excitor wire i'm Oct 15, 2018 · Alternator Wire Harness Adapter Connector LS1 LS2 LS3 LQ4 LQ9 LM7 fot GM ; GM DR44G Alternator Adapter LS1 LS2 LS3 LM7 LQ4 LQ9 Plug and Play 6" If you are upgrading your alternator to the DR44G alternator you will need this plug and play adapter. E. Two-wire Aug 10, 2014 · I believe the alternator is a 3 wire (internal regulator) that was converted to a 1 wire setup. Jun 25, 2001 · One-wire alternators are internally MORE complex than 2/3 wire alternators and therefore less reliable. Now they are PWM controlled by the PCM in most cases. The Charge Wire is connected to the Charge Post on the alternator and the wire goes to either the battery or the positive on the starter. I cannot get a comnection on the exciter wiring from switch to alternator. Features: Fits GM alternators with a 4 Pin oval connector Weather Pack style seal In-line 560 ohm, 1/2 watt resistor that allows but does not require a charge light 10 ft. The only difference is about the number of wires being used. First, I'll say that I am completely ignorant about alternator wiring (as far as what wires are connected where, under the dash) and I will appreciate any and all help from someone who knows. Nov 11, 2019 · Get the Best Performance with Holley Alternator Plug Weatherproof plug and wire pigtail 197-400 parts at JEGS. Apr 13, 2020 · What we are doing is merely using the brown wire as the exciter and the red wire to the alternator as the sensor/field strength wire for the alternator. Two wire means that you use the main battery wire to the back of the alternator and The exciter wire plays a crucial role in the proper voltage regulation of a 3-wire GM alternator. Then you must hook it up to excite (Kick start) the alternator. $9. If you’re using a one wire alternator this wire will run to the charging post on the alternator. A wire size too small can allow the wire to overheat, melt the insulation and cause a fire or Feb 3, 2024 · A 3 wire alternator wiring diagram has three wires: the primary charge wire, a third wire that can jump between the regulator and the battery stud, and the exciter wire. Aug 21, 2020 · The accepted definition of a "one wire" alternator is that it has a special type of built in regulator and only has 1 wire---the large wire feeding to the battery, and of course ground I don't particularly care for them for one reason. May 23, 2014 · I selected this particular model partially because im a sucker for blue anodized stuff, but mostly because it said that GM vehicles 88 and newer require a battery isolator with an "exciter wire" (the post on the far right of the isolator). I removed the ALt excite wire from the alternator and checked the wire itself, it has 0 ohms resistance and all connectors are free from rust. Aug 13, 2018 · A 2 wire alternator connector was used into the mid 90's, but know have 4 terminals; P, S,F,L. Keep in mind any rules and safety regulations you must follow for what you are building this project Dec 14, 2002 · My 1993 300SD charges fine after I take the engine up to over 2000 RPM. Now I've read there has to be a diode in the exciter path (Brown Wire) to stop back feeding voltage to the ignition. May 13, 2022 · Exciting a Three Wire Alternator. Common on the 1978 wire loom. Aug 3, 2023 · Buy GM 1 Wire Alternator Chrome New Self Exciting High Output 105A One wire 10SI Sbc Compatible with Chevy 350 305 DELCO Street Rod 1100125 ADR0335C 40012395 7127SECN100A 7127-SE105C: Alternators - Amazon. Apr 5, 2016 · Thought those who have installed or are going to install an American Auto Wiring (AAW) harness in their Tri-Five Chevy might be interested in the need for adding resistance to the brown alternator exciter wire in the AAW harness, especially with an early 90’s GM CS130 alternator. Jun 14, 2013 · The #1 exciter wire goes to the ignition/run post on the switch, not the accessory. I wanted to run it as a 1 wire setup, even fabbed a new bracket so it would fit on the 390FE block. That is 40 years without give or take. What is the difference between a one wire alternator, two wire alternator and three wire alternator? One-wire Alternator: Is another name for the Self-Exciting Alternator mentioned above. Dec 12, 2019 · 1-Wire GM Alternator140 AMP Output12 VoltGM 10SiInternal Regulator5/16 in. A wire called an exciter generates the voltage needed for an alternator to start working once a vehicle is started. Plug and play simple. Though wiring isn't complete, I was looking to get the alternator hooked up. May 23, 2010 · I was reading ya'lls posts about this GM 1 wire alternator alternative to the factory 3 wire setup. This is starting to get very confusing. It connects the voltage regulator’s field terminal (usually blue) to the alternator’s L terminal. Some alternator failures will switch that Excite wire to ground----turning on the lamp Jun 6, 2014 · Which shows the exact Delco alternator (older 3 wire style) that I think I have. GM Genuine Parts 12135037 Multi-Function Diode. Dec 12, 2020 · just an idea on diagnosing a HIGH VOLTAGE reading on your GM 3 wire internally regulated alternatortruck is a 1980 Chevrolet C30 "custom deluxe" cab and chas Apr 23, 2011 · The answer is no. Jan 26, 2023 · The exciter wire, which turns the voltage regulator on and is essential for starting your car, is required to generate the required voltage for the alternator to function. 99 $ 9. W x 2. With the engine running and Alt charging the light sees 12v from both sides and goes out. Jun 18, 2022 · The guy in video shared said to cut the connector end of the harness and wire the "S" wire (red wire) to the battery stud on the alternator. In an alternator that requires an exciter, if the wire is not working correctly, it won’t transmit the voltage, and the alternator fails to generate enough power. Can I run a wire from the alternator to the battery? The battery light and the light globe behind it are the exciter wire. Mar 28, 2022 · Some 1 wire alternators have a small plastic cover you can pop out and access the factory style plugin deal. 2v. They have to perform some "magic" with internal voltage-drop or rpm detection; and some days, magic just doesn't work, which is why no manufacturer would ever use a 1-wire alternator. This wire tells the alternator to start charging once the engine is running. Is this wire supposed to show continuity to ground with switch off. The 2 wire alternator plugs are specific to the type of alternator. I will be attempting to wire in a single wire alternator to my 1991 240 lh 2. This can result in a dead battery and the inability to start or operate the vehicle. When it comes to GM 3 wire alternator plugs, it is important to understand the wiring configuration and how it differs from other alternators. 8 volts on. kv5137 I'm Awesome. Current flows to the alternator, tells the regulator it's ready to accept a charge, start engine, power flows the opposite direction back to the switch. The least expensive upgrade from the 10-DN would be to step up to a 10-SI or 12-SI. Alternator Rating Wire Size Available Kits 75 Amps 10 gauge High Output Alternator Wiring Kit 555 -10510 100 Amps 8 gauge 150 Amps 6 gauge 200 Amps 4 gauge It is very important to use the correct wire size to connect the alternator to the battery. The two wire plug is the sense wire and the activation wire. When wiring a 1 wire GM alternator, there are several materials you will need to ensure a successful installation. Oct 16, 2013 · visit: https://alternatorparts. i have to rev the engine a lot to get the charge to "kick in". You can leave off the sense wire (it will sense internally) but you need the exciter wire (switched +12 to the field). The steps required for exciting the three-wire alternator are almost similar to one wire alternator. 2 and 4 wire Alternator connection. This can be removed and the GM or aftermarket two-spade wiring harness can be plugged in for three-wire operation. The 10si alternator needs a P10Si plug and the CS130 a DSC130 plug. Jan 5, 2018 · I found this on the internet which I believe is true. Some dont. GM 12SI alternators with a charge light have key on power to one side of the 194 bulb (a pink wire, usually fused on the gauges fuse) the other side of the bulb is connected to pin “2” of the alternator on a brown wire. The battery light (9 Ohm 1. Jun 17, 2016 · I wired the alternator according to the manufacturer's spec (POS, NEG, EXC to key on power source). Steve I’ll. Thanks again. Again. The one-wire alternators have a black plug cover on the side of the alternator. The 1-wire doesn't excite until you rev it up a bit but I normally push snow around 2k rpm anyway so both are charging for 90% of the time. May 14, 2016 · Buy LActrical One 1 Wire hookup self exciting Alternator Voltage Regulator compatible with GM Chevy Delco 10SI 12SI 15SI 17SI 27SI 100 205 series 12Volt: Repair & Upgrade Kits - Amazon. I've never had a problem with it and it even charges the battery at idle. Oct 12 In this video I am showing how to run a 2 pin GM alternator DR44G and control it using PWM and a DC-DC converter as a stand along unit. I've also seen the regular Delco 10SIs one wire alternators listed on e-bay. Insufficient charging: If your one wire alternator is not providing enough charge to the battery, there could be a few possible causes. May 22, 2022 · The alternator plug is a wiring adapter that allows easy installation of any Delco 10Si 12Si alternator 2 wire connection. Alternator exciter failures are quite frequent because of their high speed and because such a separate engine-controlled exciter is provided as a backup exciter. I'm all ready running an alternator (2wire) with a yellow diode wire from the alt to the starter solenoid for the excitor the diode because it ran after shutting of the key. Chrome plated alternator does not need an extra ground. Nov 23, 2013 · In the BAT plug two wire version, the alternator checks system voltage via a “sense” fuse located in a vehicle fuse box. Unlike the traditional 1 May 11, 2005 · This was a brand new unit (3G) from mr alternator. The exciter wire is responsible for providing the initial voltage signal to the alternator’s internal voltage regulator, which then controls the output voltage of the alternator. Jun 11, 2013 · Im NOT any Alternator expert, see what Jim N has to say. alternator exciter wire diode alternator rebuild kit alternator diode kit All GM SBC GEN III, IV, and V LS and LT engine alternators have at least a Charge Wire and a Ground Point. Nov 8, 2015 · I know this topic has been talk before , but everything that i had read has some sort of computer to regulate the voltage, I have a 1969 camaro with with a non original 350 chevy engine and V belts, I an planning to remove the V belts and the brackets and converted to a single serpentine belt, the donor parts came from a 1999 chevy caprice it has a cs 130 alternator i also remove the exiter Jan 14, 2019 · There's a fusible link at the end of the wire away from the alternator. Three wires are used in a three-alternator exciter wire containing three terminals. If anyone has any ideas of what could be wrong that would be awesome. If your running a modern 1 wire alternator you can hook up the sensing wire and NOT the exciter wire. : current "load". The wires are positive, the ignition input, and the voltage 1 - 24 of 25 results for Alternator (Universal/Multi-Fit One Wire Capable: Yes. NOTE Mar 10, 2024 · No more blipping the throttle to begin charging! A major benefit to using a high-output Tuff Stuff alternator is that it can be used as either a one-wire alternator or plugged right into a factory-designed three-wire system. I went ahead and ordered some rebuild parts instead of forking over the big bucks for a new alternator. I don't recall that it does, but just wanna double check. In this episode I replace the old externally regulated and unreliable 12 volt GM alternator with a remanufactured Delco 10si GM alternator. Read some good advice and wanted to chime in, so I joined. Mar 26, 2018 · The only drawback to using a one-wire alternator in GM vehicles has to do with the ALT warning lamp (idiot light) on the dash. Different functions depending on the application. ""Is the new one exact replacement for the old alternator? Could you have possible put an externally regulated alternator on? As I see you made reference to 1971 LT1 First and foremost, it’s important to understand the different wires and their functions in the alternator. If you are using a one wire alternator this wire can be trimmed out of harness. Stock routing is along the valve cover and down to the starter, where it connects to the positive battery cable. LS Swap Alternator Kit with exciter wire 5. Sep 16, 2022 · The 3-wire alternator technically has two wires going to and from it – the exciter wire, and the positive battery wire. Now you might be fine with this and not have an issue. With the wire removed from the Alt, the batt drop at the gauge is less then 0. MI. With Ignition On the gen light see ground via the Alternator. He states that the brown wire runs to the charge light in the dash and gets it's exciter voltage through the power in the light and it needs the lights resistance to work. Feb 6, 2014 · Feel free to install that not-really-a-one -wire-alternator in something older, but don't expect it to work without the ECU and all the sensors that go with that. Didn’t fix the issue either. ) Stud Terminal SizeNatural FinishIncludes:3/8 in. Helped me wire the last one with a good diagram. This is the initiator or "exciter wire". GbaeBaldwin New member. Surely somebody knows how these Jul 13, 2023 · Thanks for the reply but I have a perfectly good alternator that looks to only need a $17 pigtail connected to the exciter wire since I'm not using the stock harness. The exciter wire should not be connected directly to the battery. I have a 302 with Qjet carb, DuraSpark electronic ignition, electric cooling fan and a Bluetooth stereo with 200w Kicker Key amp. 5 V running through it no matter the key position. Jun 10, 2023 · Short video showing an install of a diode to prevent run on from feedback with an GM alternator The third wire is the exciter wire, which is connected to the voltage regulator. There's a fusible link at the end of the wire away from the alternator. The alternator turns on the voltage regulator when the engine starts turning the alternator. 33 in. Connect the “exciter” terminal on the alternator to switched voltage that is ON when the key I saw a low rpm turn on kit for a Delco 10SI alternator on e-bay (item 3875794475) that looks like it's designed to make the alternator kick in and gnenerate electricity at low rpms. I had thought it was a one wire deal, then realized in needed an exciterand off it went right up to 14. I have attached the exciter wire (with diode) to the coil, ign switch and tried wiring it into the gen light lead. Using a Tuff Stuff alternator in either a one- or three-wire installation requires no extra effort on the part of the end Dec 10, 2021 · I have a 1956 F250 w/272 and recently did a GM three wire conversion and have a question for anyone who may have had the same problem. The field wire should be an open circuit with the ignition switch in the OFF position. You can get a one wire regulator that will excite easier. Aug 11, 2022 · Hi all, This is my first post, but I recently installed a 63 amp 1 wire GM alternator and I have had issues with them going out quickly. The four wires in a Chevy 4 wire alternator are the main power wire, the exciter wire, the voltage sensing wire, and the ground wire. But then I recalled how when I first installed it, it wasn't charging. The whole purpose is to check voltage away from the alternator itself. Oct 22, 2007 · Then connect the ammeter with one terminal to the big cable connection (+ of ammeter) and the other to the smaller wires originally connected to the big cable. The other main connection on the alternator is the output terminal that charges the battery. Apr 14, 2021 · If someone could help me out with where and how to wire in the exciter wire when installing a single wire alternator. you must have a big, oversized charging wire, because that one wire is also the SENSING wire, and with heavy loads, and additionally a low battery, such as If your alternator comes with a pigtail that plugs into the alternator with a single loose wire coming out of it, this small exciter wire will need to be connected to an ignition switched source to turn the alternator on and off with the key switch. I only have a voltmeter with my Dolphin 5 inch quad set gauges(for 52 chevy pick-up). Mar 21, 2002 · the 'F' wire is the Field (the power that you put back IN so the electro magnet in the center which is spinning can generate voltage on the outer windings) the 'S' wire was used for the dummy light on the dash It would seem that the Exciter wire would be the same as the field (the field is what excites the outer windings) Dec 29, 2022 · The self-sensing voltage regulator used in single wire alternators does not need a switched 12-volt exciter circuit wired to it like a 3- or 4-wire alternator with external regulator. | ASAD ELECTRICAL Feb 18, 2022 · The backhoe I bought has a GM alternator. Here are some common issues that may arise and tips for resolving them: 1. The diode is to prevent back feed from the exciter terminal to the ignition switch when the engine is shut off. The plug is designed to snap into the 2 pin connector in the back of 10Si style internally regulated alternator. The exciter wire is blacked out as it leaves the alternator plug, so that little bit of wire going into your flex loom isn't as noticeable. The "L" wire (yellow wire) has a resistor fused with the wire and resistance is rated at 511 ohm, and runs directly to a clean switched ignition connection. com Jul 23, 2014 · This is kinda how that exciter wire works 12 volts to the lamp and 12 volts coming from the alternator Excite wire when the alternator is running-----this keeps the light off----12v one both sides of the lamp and no ground. Pin 1 is to exciter pin 2 12v bat and then that goes to the power output on the back with a bat cable that goes to the starter. Whether you’re upgrading your vehicle’s electrical system or building a custom project, a 1 wire GM alternator can be a valuable addition. There were some Sep 16, 2021 · A GM "One-Wire" Alternator WILL self-excite, here's the trick . but I had a moment of wondering if it was ever charging. But I like to see at least 14. Overall, the Chevy 3 wire alternator is a reliable and efficient component in a vehicle’s electrical system. com A GM single wire alternator has only one wire coming out of it, which acts as both the charge wire and the sensing wire. Shop Now at the Guaranteed Lowest Price! $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: 2025 and connect the red wire to the output side of the alternator 10/32 stud, take the long wire and connect to the + side of the coil. Michigan Motorsports GM Alternator Wire Pigtail Connector -Fits LS1 LS6 LS2 LS3 LS7 C5 C6 1989-2013 GM GMC Buick Cadillac Pontiac. Apr 10, 2024 · Ignition to Gen Light, then Gen Light to the Exciter. 6v. Dec 26, 2014 · A GM factory one wire alternator is not just for industrial engines. A GM alternator is a crucial part of a vehicle’s electrical system, responsible for generating and supplying electrical power to various components. IMPORTANT: USE #10 STRANDED WIRE FOR AMMETER CONNECTIONS lastly, if the sense wire is left unconnected it will allow the alternator to overcharge the battery so hook it up! Good luck Apr 27, 2015 · I like to use an idiot light wired into the exciter circuit so I'll know if the battery is charging but I've bought cars with a 3 wire alternator and no exciter wire going to ita bare plug with nothing plugged into it. This failure of the alternator affects the vehicle’s battery with No charge problem solved! CHARGING PROBLEM SOLVED! Alternator Exciter Wire Bypass Ford F-550 7. Everything else is stock. Features: Fits GM alternators with a 4 Pin oval connector; Weather Pack style seal; In-line 560 ohm, 1/2 watt resistor that allows but does not require a charge light; 8 ft. Apr 6, 2023 · 1606501158]The third wire is the exciter wire, (post number 1) it kick starts the alternator. I will make sure with a meter the EXCITER wire is 12 volts, with my ignition switch in the Start/ON position. The other end of the globe is connected to the alternator. Further, 10SI and 12SI alternators are apparently extra susceptible to backfeeding through the brown exciter wire (thereby energizing the ignition switch when it should be off: resulting in motor be unable to shut off). So, the answer is. Then you might need to grind thru the power coat. I ran a wire from the output of the alternator to the battery. Video: 3 Wire Charging Alternator Connection. The sensing wire is looped from the alternator’s terminal 2 to the positive battery wire post on the alternator. The Charge wire is on the BAT terminal on the alternator and usually runs to the J-studs on the firewall. HOWEVER as I understand it, the little No 1 spade Exciter terminal, on the GM 10SI Family of 3 wire alternators, would initially draw current from the 12 volt battery source, but once the alternator is up to speed and self exciting, its like 12 volts is then at that terminal (internaly via the alternator) so there wouldnt be any current Oct 22, 2022 · Not much to it, get the one wire alternator, and brackets from a 302 and mount it up, belts will be the same as the 302, wire goes to the battery. The one wire GM type of alternator is RPM sensing and must reach a specified speed before it will charge. This will adapter your 4 way flat connector to the connector for the alternator. xidaqz aeza mnsgvf avwv tgahm puhoe rmmcu vflamz mjwytww rhrr