The exciter alternator has armature as rotor and pole as stator. Check the alternator gauge. Back to High Amp Alternator. So the alternator warning light is doing two things: It provides the excitation current to kick the alternator into functionality, AND it acts as a warning light by glowing when there’s more than a two-volt difference across the light’s two wires. Manually wiring IGN wire to excite alternator (1999 Camry) My charging system has gone out in my 1999 5S-FE Camry. If not, run a wire to it from the start terminal with a diode in the line to keep from backfeeding and trying to keep the starter engaged. These smaller case style alternators (Direct Replacement High Output Alternators designed as a one for one swap on your current or new engine) are discussed in the Start Battery, Single and/or Dual Alternator Charging System Solutions below. It also needs a resistor inline in the #1 wire to limit current flow in and out of the regulator. An alternator's output is rated much like a generator's, and is the maximum output that the alternator is capable of producing for an extended period of time. The sense circuitry in the one-wire regulator can be bypassed to excite the alternator as soon as the ignition switch is turned on. 17 Now that the alternator belt has been installed and adjusted, reconnect the negative battery cable. My friend and I are planning on building a welder using a large alternator out of a semi truck and a 9. NEW 12 volt, 85 ampFits Perkins & LehmanReplaces Lehman # 2E7Replaces Prestolite # 66021535SReplaces Lucas # 47020088Fits on Ford Leh. I fixed this issue by addressing the placement of the voltage sensing wires and beefing up both the positive and negative alternator output wires. Every flaps on the planet most likely stocks several of them. The two in the first picture are external regulated. Fairway Auto Sales, Salt Lake City, UT, 801-523-7540. One thing you could do is compare your working alternator to the dead one. The alternator on your 3. You can run a Alternator without a battery connected apart from the initial excitation, and use a variable supply to vary the output voltage, empirical bench testing has shown it. I have always been told if the truck dies with no batt, it’s the alternatorbut I wanted to verify anything else I can check before taking the alt down to the parts house. The sense circuitry in the one-wire regulator can be bypassed to excite the alternator as soon as the ignition switch is turned on. It seems like the alternator would have a longer life if it ran cooler. The alternator hangs a little low and, in rough terrain, the steering rod can come up high enough to hit the alternator fan. The thin blue wire goes to the dash indicator light and this MUST glow when you turn the ignition on. It'll help you to diagnose a BAD alternator in a pinch. Buy NEW MARINE ALTERNATOR FOR PRESTOLITE & MOTOROLA REPLACEMENT , 1-WIRE SELF EXCITE at Walmart. Tuck the wire loop unto edge of a black wire using the crimping tool. S13 Sr20det w/ Nissan Quest alternator As the title states, after swapping to this new alternator (tried 2 brand new ones now) I can't get it to excite in order to start charging. Had to excite the alternator. My charge wire doesnt give the 12v to excite the alt. This is important as the alternator is designed for. A 10si gives you a charge light when hooked up and does not need a bunch of rpms to excite. BROWN wire connects to the Onition switch or an oil pressure activated switch. Normally, the current for the field windings is supplied by the battery while the engine is being started, but once the battery is started, the armature windings (on the stator) generate enough current & voltage to power the field coils, so the alternator becomes show more I'm referring to a normal car alternator. Bernie, the situation you have is quite typical and I do not beleive you have a problem at all. After buying a new alternator and having no change in my alternator output, 0V, I started probing the wires for voltage and found that the center red/light blue (IGN) wire was the culprit. A voltage regulator will limit the maximum amount of voltage from a power source and prevents a device or alternator from. Wire a 2 watt bulb up between the alternator and the ignition switch. This time the alternator burn't up. On a "1 wire" system that's usually tied back as well, with the side effect that the alternator doesn't fire up until a certain RPM is reached, often meaning you need to "goose it" to get it started. Your alternator is the lifeblood of your car's or truck s electrical system, and it is responsible for keeping your battery charged, your radio kicking, and your accessories energized. Lastly, there are some replacement voltage regulator modules that will allow the alternator to self excite at substantially lower rpm, usually for an additional cost. To study how to control the real power and the reactive power delivered by an alternator. Brushes inside the alternator cause some sparking when the alternator is charging. It's only confusing. 19301113 - COPO Camaro Alternator Excite Harness 888-748-4655 | 330-965-7146 50 Karago Ave. Most people will just swap out the generator for a typical 12 volt AC Delco 10-SI alternator. The battery resting. Bad connections = you turn ON the key and excitation voltage does not reach the alternator. The AC Delco 3 wire alternator was used in most General Motors products, and many types of heavy equipment, for a long time, which makes it readily available. Self Excite an Alternator Without Any DC Generator, Capacitor Bank or Battery Step 1: Things Needed: Step 2: Mechanical Connections: First we will do the mechanical connections Step 3: Electrical Connections (Alernator): Rotor Step 4: Electrical Connections (DC Motor): You can use any. And regarding the path of alternator switching: voltage goes through the battery-light to excite the alternator. alternator does not charge when the car is first started 2. Locate 6 volt alternator for sale now online. If you overexcite, you could (will) burn out your alternator. My ignition switch is good and I have continuity from the switch to the altenator plug. A simple easy to use Alternator set up is the GM10si set up as a one wire more or less. If this proceedure makes the alternator excite and charge immediately without over charging, then I would make a fused Ignition supplied wire for the permanent repair. Bear in mind that the alternator will need to spin at at least 600 RPM to do any good. The most recently reported issues are listed below. That being said, Mechman has recently migrated to a 400 RPM Self-Exciting regulator that will not un-excite during extended periods of idling – the main draw back to traditional 1-wire designs. It appears that the self-exciting alternator didn’t excite. The make and model number of alternator is required. informative video of the installation of a. Lastly, there are some replacement voltage regulator modules that will allow the alternator to self excite at substantially lower rpm, usually for an additional cost. No one knows, including the people who sell alternators, how an individual specimen, or even a particular model, will behave in that regard, as it's outside the. The two main techniques for synchronous generators are the separate exciter and capacitor excitation and these are described in the following sections. Going to hook it to the free lawnmower I recently got to make a 12v generator. Before a dedicated one-wire alternator was developed, enthusiasts would make a jumper wire to “excite” the charging properties of the alternator. Alternator warning light Post by Theo » Tue Apr 09, 2013 7:44 am I've recently installed a dash 2 to my Nissan powered BMW E30 and one of the few teething problems I'm experiencing relates to the alternator light of all things. The advantages you get with the 3-wire setup are that you don't have to rev the engine to excite the alternator and it has a voltage sense wire which will do a better job. The VW wiring will cope with the 50amp alternator without any changes. Just run a wire from there to the alternator plug. A brush less alternators are those which rotor exciter is self a small alternator. Though each alternator body would have to be electrically isolated from the others, as every alternator I've ever dealt with grounds the body. A normal ratio would be 2. Recommended For You. B+ (battery) B-(ground) EXC (basically the voltage which the alternator uses to excite the field in the alternator - usually switched which is the purple on our boats - why to run this off a different wire is that if you were to measure voltage across the B+ and B- it should be similar to the battery but it might. It must connect to power only when the ignition is on or it will run down the battery when parked. The belt was wrapped around the crank pulley, water pump and alternator. You can then use it as a three-phase motor, powered by the first alternator. Self-Exciting Alternator makes no need for Alternator Wiring Diagram The Self-Exciting alternator is an alternator that has a special voltage regulator that doesn't need an ignition wire to activate it. It is a 6 gauge battery cable, like what is used for lawnmowers. Contact Sure Power Industries technical support 503-692-5360 to help verify your alternator/isolator application. Ground the alternator case to the frame run the battery wire to the battery and then in the plug on the back wire just the hot side to the battery. The GRY wire from the alternator to the regulator was cut and so was the YEL from the starter solenoid. The D+ terminal is connected to one end of the charge warning lamp, while the other end of the lamp is connected to the battery via the ignition switch. compared with published data for that type of alternator. Replacing Alternator Brushes It is necessary to disconnect the battery and remove the alternator to switch out brushes. Hi folks, I have been reading old posts on this and I think I got: 1. Normally, the current for the field windings is supplied by the battery while the engine is being started, but once the battery is started, the armature windings (on the stator) generate enough current & voltage to power the field coils, so the alternator becomes. I'm not familiar with the alternator you're talking about but you should be able to excite it off of the alternator. Click through to watch this video on expertvillage. What's happening and why. The regulator excites the field at whatever level it takes to keep the voltage at the input terminal at 13. Installing 4kW/Hr battery bank with 800W 120V Inverter and Trickle Charger from Tactical Woodgas. For use on those occasions when I'm motoring along all day. Yes, the big wire is going to the back of the starter. Sometimes the engine has to be revved up once or twice to excite the regulator. Used 2014 Mazda3 i Sport Hatchback for sale - only $11,991. Voltage sensing is used when you want the alternator to read voltage at some other point than the battery. Divide the crank shaft pulley diameter by the alternator pulley diameter. The warning light circuit works by sending power via a light to the warning light terminal of the alternator to excite the alternator Once the alternator is charging, it then sends a power back up the warning light wire, so 2 positives cancel out the light Same thing should work using the starter relay coil in place of the warning light Mick. If the exciter wire is grounded that will cause the output to do that. Run engine at 2,000 rpms for tests and turn on the blower fan for the AC or Heater, the headlamps, and any other accessories that put a strain on the alternator, and watch the gauge to see if it decreases voltage or amperage. In single alt trucks, there is a "loopback" in the plug on the passenger side inner fender. Read more about a serpentine belt. To choose the proper battery isolator for your application the vehicle alternator type is very critical, so verify the alternator you have. A quick rev of the engine excites the alternator and your set. One-wire alternators use internal increasing voltage to excite the Field - "turn it on". I ran his alternator in bulk charge and measured a. REMOTE EXCITE, CASE GROUND. Basically running as an ACSM (Alternating Current Synchronous Motor) or BLDC (BrushLess Direct Current) motor. Whether you want to be entertained or informed, to laugh, think, or sing, XM has the perfect channel for you coast-to-coast, and in digital-quality sound. the optimal charging voltage is 14. You'd be better off with a solid battery bank, I'd suggest Four 6v golf cart batteries and a nice onboard charger. ALL of them require good, clean, and tight connections. How To: GM 1 wire alternator to a 3 wire in a Toyota The stock yota is a 5-wire set up I feel better running the GM as a 3-wire when it takes only a few minutes to do. It requires a bulb in a certain current range so if replaced with an LED type polarity is important and it may have to have a resistor added to maintain the proper current. Show 12 24 48 100 of 111 Results View:. This is the EASIEST on car test for testing a BAD ALTERNATOR! If you've been wondering how to test the alternator on your car, this is the test to do. One is for the 302 location, the other for the 351w/351c location. Some alternators required revving the engine to a certain RPM in order to excite the alternator so it would turn on and start charging. (See Figure 5). in case of alternator we want some current like 4600 A we can't get directly so we use exciter that exciter field winding will transfer the flux to alternator winding. If your starter solenoid has an ignition boost post on it, (another small post like the start post), you can run a wire from it to the alternator excite terminal, I had to do that on a JD 2950 instead of tearing the dash apart to find the problem. It appears that the self-exciting alternator didn’t excite. I hope this helps you, Hugh. Used this to rebuild a 136 amp Denso 913AB alternator from a 1999 Dodge 3500 Van. NOTES: DUVAC SYSTEM. Used only for those that require the stock connector to fit snugly. This voltage is used to excite the field coils for the alternator to generate stronger voltage as part of its build up process. The voltage set point is 14. Would anyone one here mind sending me there schematics or plans?. When I left for work this morning it was actually discharging. wrx_02, your alternator should be charging the system at between 13. to them could be ignition excite or self excite with remote voltage sense or lamp. Alternator/generator/regulator Problems of Chevrolet Astro Chevrolet Astro owners have reported 13 problems related to alternator/generator/regulator (under the electrical system category). The first connects to the wire that goes to the battery and starter motor, the second to the ignition and warning lights while the third, if applicable, is the ground wire terminal. Show 12 24 48 100 of 111 Results View:. Nothing wrong with the alternator. Re: Connect exciter/field wire while running the alternator "I gues im worried overcharging. You could jump a totally dead vehicle, remove the battery, if necessary, and the engine would still run. (The alternator does get freshened up periodically, when the engine has to be replaced or removed for service. Checking the voltage output of your alternator can help you diagnose charging problems if your battery is dead even after normal use. This DC voltage can be supplied to the alternator separately or may be produced from the AC current produced by it thorough conversion. Used only for those that require the stock connector to fit snugly. This could cause the battery to run down over time. Learn what does P0622 Generator Field Control Circuit Malfunction means, location and how to repair? The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. Wire a 2 watt bulb up between the alternator and the ignition switch. Without the excitation there will be no power output. The best out there is the Perfect Switch battery isolator, but it's not cheap. One last detail you will need to do is to create a jumper wire from one terminal of the plate to the ground stud on the alternator. 5Hz (- more to come when the river rises). Enough to drain it over the course of a few days. Hi UJ There were quite a few changes to vehicle alternators in the 60, the early ones had external voltage regulators, some needed a 12V supply to “excite” the field windings, (on these if even you managed to start a car with a flat battery the alternator could struggle to develop current to charge the battery). I would go from an ignition HOT on one side of the bulb and the other side of the bulb would go to the excite wire on the alternator. FREE ENERGY POWER GENERATOR at home with used car alternators4. When one-wire alternators first came out, those were valid concerns: low output at idle meant sitting at a light with headlights and stereo blasting wasn't good for the electrical system or the battery. 9 hp briggs vanguard engine. I will use the bulb in the excite circuit. Coming to the alternator excitation system which is excited by two types of excitation system. This circuit provides 2 uses. Unlike an OEM specific alternator, a universal alternator works on a variety of vehicle engines. Basically I'm thinking about tackling a project of making dual alternator bracket kits that would allow you to run at least 2 alternators (I'm going to try and make one that will fit 3 if needed). 4, most now have a brushless excitation system. One of the largest contributors to the confusion is the fact that some one-wire alternators are built using an SI series case. How to excite 5. Its controlled by the regulator and produces more or less magnetic field in the alternator to control the charging rate. The right post marked'2' is in need of voltage to excite the alternator for power up. So the alternator warning light is doing two things: It provides the excitation current to kick the alternator into functionality, AND it acts as a warning light by glowing when there’s more than a two-volt difference across the light’s two wires. My only assumption so far is the wire from battery light to alternator has shorted to ground midway or a fault with the clocks or possibly BSI module if the wiring runs through this. Once engine starts and alt starts making current, the lamp has 12v on each side so lamp goes out. The alternator needs current to excite the field windings to begin charging. (6 volt, Positive Ground alternator Installation, 1955 Studebaker President Sedan) (Six Volt Alternator) This is the procedure to install a 53 amp, 6 volt positive ground alternator. Does the field wire require a small amount of "impedence" such as a small light bulb between the 12v+ source of origin and the field terminal on the alternator to "excite" the field of the alternator? So, I need to know the wire color and where it comes from. Such excitation system is used in a small alternator. I suspect that this alternator is alt+regulator combined (looks like it) and my wiring harness is designed for alternator only, with the regulator sitting on the back of the engine. If this does not satisfy the problem, I would start looking for a problem such as a broken or fusible link. Whenever the alternator is replaced, it's a good idea to change the serpentine belt too. The voltage needs to less than 15. This circuit provides 2 uses. that if the bulb blows the alternator will still receive initial excitation. As with any self exciting regulator, you may need to rev or blip the throttle at start up to excite the unit and then normal operations will take over. Shut the truck off and started it later and same thing happened. This means it could look like an SI alternator, but be modified internally to self-excite at a specific engine RPM. (See Figure 5). DIY 12V Generator Charger - 3 Getting Ready to Fire it Up. It doesn't have to be mounted in the dash you could mount it in the engine bay if you wanted. doesn't need a ground the body of the alt. It is not very expensive, and by replacing it together with the alternator, you can save on labor, as the serpentine belt has to be removed to replace the alternator. (added on edit) Let's think about how an alternator works - the stator turns to excite the fields (or the Field excites the stator). If the engine idle speed and pulley ratio combination does not allow the alternator to come to during start-up, the engine will have to increase the RPM to engage the one wire alternator. How to Test an Alternator ( Testing the Voltage Regulator, Diode rectifier and Stator). If there's no arc, the alternator has an open Field circuit or. PowerMaster makes a Delco 10si style alternator that will bolt right in place of the Motorola alternator. TACH CALIBRATION. Does the field wire require a small amount of "impedence" such as a small light bulb between the 12v+ source of origin and the field terminal on the alternator to "excite" the field of the alternator? So, I need to know the wire color and where it comes from. I finally found what I used at a local auto parts store. It is a 6 gauge battery cable, like what is used for lawnmowers. That's right, some simple pantyhose can act as a makeshift alternator belt until you find a proper solution, i. designed to charge and maintain both chassis and coach batteries. My only assumption so far is the wire from battery light to alternator has shorted to ground midway or a fault with the clocks or possibly BSI module if the wiring runs through this. To get full power it may require an ESC rated at 200 to 300 volts and 100 to 200 amp. Clicking this will make more experts see the question and we will remind you when it gets answered. To use an alternator as a motor you need to properly excite it meaning supplying the proper voltage and frequency with appropriate timing. The Alternator stopped charging in the UC last night. Re: IH 784 Alternator wiring? You still need the warning light wire connected to excite the alternator when the ignition is switched on. Two blades labeled 1 and 2. I need a quick temporary fix for this. The Subaru ECU has an "Alternator charge Cut-out Function" that is controlled by the electrical load on the vehicle, the vehicle has an alternator with a 3-pin plug (C=computer control: S=Battery sense: L=Warning Lamp). A while back on the forum the view became that the charge light was not necessary for a Bosch 85 amp Alternator because they can self excite. I have a 105 amp alternator that was rebuilt last year. They also have low RPM charge issues. This is the black wire in teh photo with the yellow crimp connectors. Part # D17273MA140 - Delco Remy type 140 Amp 12Si High Output Alternator with Standard Hook up Voltage Regulator Alternator # D110SiSE6V35P 6V 35 Amp 10Si Series Self Exciting (One-Wire) Positive Ground Alternator. Slide the power steering reservoir back in place. I connected the excite wire to it, and it works perfectly. The regulator does as it says it regulates the amount of power available to the charging of the battery, whereas the diode pack rectifies the AC source to DC, which we use throughout the motorcycle. The fact of the matter is an. Electric generators may lose their ability to generate electricity if the field windings become demagnetized. If it's a Delco and it has an internal regulator then it will not charge. In that case, the additional connector and wires used on the traditional SI are unnecessary. Don’t worry if the colors don’t match because these are interchangeable. Yes, the big wire is going to the back of the starter. How to Test an Alternator ( Testing the Voltage Regulator, Diode rectifier and Stator). It appears that the self-exciting alternator didn’t excite. This is a discussion on How to excite 5. I suspect that this alternator is alt+regulator combined (looks like it) and my wiring harness is designed for alternator only, with the regulator sitting on the back of the engine. The VW wiring will cope with the 50amp alternator without any changes. Powermaster one-wire alternators for street use need between 1,200 to 2,400 shaft RPM to turn-on the charging circuit in a one-wire alternator, depending on the amperage rating. Reving the engine once to "excite" the one wire alt does indeed turn the alt on but that is really not how things should work in a vehicle with a lot of accessories. WARNING: This method will only work if you have the lead-acid battery installed. The alternator now begins to develop identical voltages at the D+ and B+ terminals. What I keed to know is how does the voltage get to the alternator to excite the field. The 3rd one is for a light or gauge or something like that. For example, let’s say we have a 7 inch diameter crank shaft pulley and a 2. "Many people still believe that alternators do not charge at idle or that the engine has to be revved up to turn on the alternator. Does the field wire require a small amount of "impedence" such as a small light bulb between the 12v+ source of origin and the field terminal on the alternator to "excite" the field of the alternator? So, I need to know the wire color and where it comes from. Once the voltage regulator turns on, the alternator will remain on and charging until the engine comes to a complete stop. com, and/or their agents, advertisers, and agencies at all telephone numbers provided by me (including mobile devices and wireless numbers). But as stated, efficiency will be somewhat lower. The wire to excite the charge circuit should be ignition power and run through a bulb in the dash. net, comments to [email protected] But,if you are lucky enough to be using a Delco alternator,just connect a small jumper wire from the F terminal to the output lug. Best Answer: Unlike a generator and alternator does not have permanent magnets to excite the field coils. Flashing a generator Authored by: ? Brought to you by www. If you use a fused jumper wire from the battery while the truck is idling then you should be able to excite the alternator. A normal ratio would be 2. As long at you do not blip the throttle before you have full oil pressure, then just blip the throttle to start the alternator(s). We assume that you dont have car-part stores that can test parts for free. Some alternators required revving the engine to a certain RPM in order to excite the alternator so it would turn on and start charging. The method Kevink is describing is for internal regulator I think?. Remove the regulator wires that go to the alternator. If it doesn’t have a third terminal it means the alternator is grounded directly to the Yanmar engine block. Brushless excitation system; Brush excitation system; Brush excitation system: This is an old technique to excite an alternator. The charging system of your Chevy is a vital piece of the reliability puzzle, and if you’re relying on a crusty original alternator you might be on borrowed time. Upon starting, it sends voltage to the alternator for just long enough to excite then drops out. Place the positive lead of the meter on the positive lead of the battery. Voltage regulators are commonly found in vehicles and other electronic equipment. The AC Delco 3 wire alternator was used in most General Motors products, and many types of heavy equipment, for a long time, which makes it readily available. A bigger alternator will recharge a flat battery faster of course, but the 30 amp generator does work just fine for most old VWs. I would expect the main field to have about 3 or 4 ohms resistance. Turn on headlights while you crank the starter to start the engine. The alternator hangs a little low and, in rough terrain, the steering rod can come up high enough to hit the alternator fan. If you hook the exciter wire to your ignition, it will work, but when you go to turn the engine off, the alt will "backfeed" power to the coil and the engine will keep running. In that case, the additional connector and wires used on the traditional SI are unnecessary. The VR is in the box above the connector. 1 is for a sense wire and 2 is for a excite wire. I finally found what I used at a local auto parts store. The #2 regulator terminal is the feedback circuit used to regulate alternator output voltage. Either GM or Ford is a good design, the Ford models being a little smaller and fitting the brackets a little easier. alternator will not charge a dead battery because alternators take current to excite the ﬁeld coil to make everything work. Using LED as Alternator Light? - My car is a 1973 MGB, using a GM C130 type alternator. An automotive alternator can function as a generator but it's important to understand that you need a charged battery to excite the field BEFORE the alternator is capable of putting out power. This is more than just an idiot light. A the other one goes to the warning light. Also, some warning light circuits are equipped with a resistor in parallel with the warning light that will permit. Brushless excitation Although some generators are still produced with brushes and sliprings to provide the rotor current as illustrated in Fig. To choose the proper battery isolator for your application the vehicle alternator type is very critical, so verify the alternator you have. I have a Ford 4600 diesel tractor that doesn't seem to be able to charge the battery. Self Excite an Alternator Without Any DC Generator, Capacitor Bank or Battery Step 1: Things Needed: Step 2: Mechanical Connections: First we will do the mechanical connections Step 3: Electrical Connections (Alernator): Rotor Step 4: Electrical Connections (DC Motor): You can use any. If you rev up that engine, say up to 1600rpm, does that get the voltage meter increasing? Is there a wire to the alternator for exciting? Maybe connected to an oil pressure switch?. At that time the alternator at least gets new bearings, and about every other time it gets brushes and a new Delco voltage regulator and diode trio. Your alternator is the lifeblood of your car's or truck s electrical system, and it is responsible for keeping your battery charged, your radio kicking, and your accessories energized. How to Test a Voltage Regulator. Many modern vehicles adopted a load request type charging system with the introduction of smart charge systems and CANBUS systems which are now widely being used. Going to hook it to the free lawnmower I recently got to make a 12v generator. Sometimes the engine has to be revved up once or twice to excite the regulator. The alternator should have an audible whir and ramp up to max output. This terminal is used to excite the 10SI into operation. Toyota runs to the 12v+ from alternator to a ground path via charge light relay. And regarding the path of alternator switching: voltage goes through the battery-light to excite the alternator. *This resister is of insufficient resistance to excite my lucas alternator. Would anyone one here mind sending me there schematics or plans?. At what points on the alternator do you check it from and I guess you would use a voltmeter to take the reading. The DC generator generates a small amount of electricity just enough to excite the field coils of the connected alternator to generate electricity. If your starter solenoid has an ignition boost post on it, (another small post like the start post), you can run a wire from it to the alternator excite terminal, I had to do that on a JD 2950 instead of tearing the dash apart to find the problem. The voltage needs to less than 15. Alternators need DC excitation at the rotor to create rotating magnetic field. If you don't excite the rotor enough you'll have disappointing output. Even in the most basic installations, the one-wire alternator is an easy installation with a single charging wire to run from the alternator to the battery. To operate a DC machine as a prime mover to power an alternator. Self Excite an Alternator Without Any DC Generator, Capacitor Bank or Battery: Hi!This instructable is for converting a field excited alternator into a self-excited one. My 02 marquis alternator not charging the battery !!!! I have 12 v coming from main cable to alternator and in the white wire in harness it has 12v but the green/red excite wire I have no voltage. If your vehicle begins showing signs of reduced power like dimming headlights or interior lighting, you can have your. If not, run a wire to it from the start terminal with a diode in the line to keep from backfeeding and trying to keep the starter engaged. alternator battery post and battery post on back plate. Buy a cheap 80 amp Mystery ESC off Ebay and it will run at a low RPM. The method Kevink is describing is for internal regulator I think?. It doesn't have to be mounted in the dash you could mount it in the engine bay if you wanted. The advantages you get with the 3-wire setup are that you don't have to rev the engine to excite the alternator and it has a voltage sense wire which will do a better job. Alternator fails (to charge the Battery), the potential at the WL terminal will fall to zero and the 'Charge Failure' LED will be Lit. It spins and we achieve around 49. There may be a connection problem to the alternator that is causing it to put full output. Alternator rebuild kits are available online for $15-$50. If there's no arc, the alternator has an open Field circuit or. by Katina Blue. Most people will just swap out the generator for a typical 12 volt AC Delco 10-SI alternator. It starts charging at a much lower engine speed than most other alternators and is perfect for your machine that requires a smaller alternator. The sense circuitry in the one-wire regulator can be bypassed to excite the alternator as soon as the ignition switch is turned on. For enhanced charging, install an externally regulated "P" type alternator, and use a 3 stage charge regulator. One of them is connected to an existing 3phase 10KVa alternator which although a little old seems to be in good condition. Can be used on it's own or fitted in series with a low load indicator lamp. that if the bulb blows the alternator will still receive initial excitation. So you check for faulty circuit from the regulator to the alternator of the car. This wire could be jumped to the alternator output terminal at the alternator for one wire operation but you should be aware that with the engine not running there will be about 300 ma of parasitic draw on the battery. It has a new alternator but not voltage to excite to field. We are restoring a water mill and have recently got our 2 wheels turning once more. Nothing wrong with the alternator. If the engine idle speed and pulley ratio combination does not allow the alternator to come to during start-up, the engine will have to increase the RPM to engage the one wire alternator. Some people in boats have reversed the excite and sense wires, but unlikely in a car with a harness. Install a 6 Volt Alternator on Your Old Car!: Intro: So you have an old car that has a 6 volt electrical system and you want more electrical power. It is typically used for reducing the regular maintenance costs and to reduce the risk of brush-fire. 3 ls alternator within the General Help - 6th Gen forums, part of the 6th Generation Chevrolet Camaro category; Im finishing up my carbed ls swap and the alternator is not charging because Im not running a ecu. Recent experience has shown that a variable-frequency drive of modest size produced torsional oscillations in a turbo-alternator shaft which were of such a level as to put the shaft at risk. This means it could look like an SI alternator, but be modified internally to self-excite at a specific engine RPM. the only light that has not been accounted for is the alternator excite lamp, does this have to draw a certain amount of current i. Then after starting (with the starter), the voltage should jump up to maybe 8 or even 10 volts as the juice used to spin the engine is replaced, and gradually taper back to maybe 6. Both Alternator and DC generator both are exited by a DC field. The fact of the matter is an. Make sure the bulb is no more than 2 watts as it could damage the regulator. I use a momentary switch to excite the alternator and it will continue to charge even at low RPM (+- 400). It will self-excite, meaning that it can start charging and stop charging all on its own. My alternator does work but only when you make a connection from the battery to the blue exciter wire on the alternator. This method of controlled ‘excitation-build-up’ will provide a soft approach to transformer magnetisation by a soft voltage build-up of the alternator and so in turn, the magnetisation process of the transformer. Vintage Car Parts.