A popular form of performance upgrade revolves around applying current technology to older machines. If the warning light bulb burns out no electricity will pass through it and the charging system won't work so the resistor provides another path for the electricity to flow through to keep the charging system working. This is not the place for such content. Ignition Warning Light Assembly. The pink resistor wire that feeds the coil and the ALT light circuit (and the tach if so equipped) all get B+ from the same circuit on the ignition switch. There are 3 connection points, the alternator, the alt. I wouldn't want the resistor to blow and leave no warning light. Again the terminal will be marked WL or IND. If the warning light bulb burns out no electricity will pass through it and the charging system won't work so the resistor provides another path for the electricity to flow through to keep the charging system working. If your car is like this Chevelle and has a voltmeter or factory ammeter gauge without a charging system warning light, a resistor must be wired into the warning light circuit. Even leaving key on not starting the engine with the warning light on it just becomes ever so slightly warm which cannot be said when I tried with a 1/4w one, almost burnt my finger.... Ive just tried the resistor in parallel to the bulb with no joy, is it definitely meant to be wired in parallel to the indicator lamp? On the back of GM alternators, you will find a two- or four-wire plug along with a large output stud. The T5s are 1w, so those T10s at 3w might just do the trick. The light excites the alternator and illuminates. It does depend on the alternator a little, but with my original GM alternator, I ended up doing as Bernire suggested; I had the original lamp taped up behind the dash as a load. Another minor disadvantage to one-wire alternators is the rotor in the alternator must achieve a certain speed to self-excite. Even a stock replacement CS130D will offer more power at low speeds than previous models. There is a 500 ohm resistor in parallel with the warning light so that if the bulb burns out, the regulator still gets the exciter voltage. We wanted to get input from a few professionals in the world of automotive charging, so we reached out to Tuff Stuff Performance and Painless Performance. A quick test with the engine idling is to turn on several electrical accessories like headlights and the heater fan. Before we get into the swap details, it’s beneficial to investigate charging-output numbers. 7323113 Indicator Lamp T5 Capless, 24V 40ma W2x4.6d, 5x20mm. We’ve used these two-post terminal blocks, available from Jegs, for mounting both live battery power and switched power. © 2020 Power Automedia. Unfortunately, with the charging system at normal operating temperature, internal resistance increases with heat, and the output drops, typically by 15 to 20 percent. With this review of the wiring harness differences, updating your charging system should not be very intimidating. Always meant to change it for a resistor, but ended up changing alternators first. Often the current through the alternator warning lamp is necessary for the alternator to start producing power. Once the engine starts that small current flow is used to excite the alternator (unless you have a self-exciting one) so that it starts to output a voltage. The resistor is only âin playâ during the time it takes me to insert the This is true for all later model alternators with internal voltage regulators and is why Painless includes the resistor in every pigtail conversion. Disconnect the D connector with the 3 wires (yellow/white, white/black and green/red) from the voltage regulator. This usually requires the driver to rev the engine to increase internal voltage to sufficiently excite the alternator to begin charging. Alternator Excite Light Repacement - posted in Problems, Questions and Technical: Hi guys and gals I have replaced my std clocks with a digital dash i have also added a warning light module. Remote-sensing alternators are capable of charging the moment the engine starts. This is very common on boats Vas, my own boat does it too, but it's no big deal for me to blip the throttle so i've never bothered to do anything about it. The warning light supplies an exciter voltage that tells the regulator to turn on. Evening all looking for a bit of guidance. It is my understanding that the alternator needs current flowing into the L terminal to get going. Lets do the connections on each, one at a time. If your car is like this Chevelle and has a voltmeter or factory ammeter gauge without a charging system warning light, a resistor must be wired into the warning light circuit. Warning Light For Alternator Yesterday S Tractors. Place a 1N4004 diode backwards across the led to protect it from the reverse voltages - these two components are in parallel. Retaining a 10-DN with the separate voltage regulator might be a good idea for those who want to retain the original appearance — for restoration purposes. my understanding is that I need about 10 ohms resistance so the warning light only comes on when an undercharge situation at the alternator/regulator occurs. Users who post it may find their access limited or permanently suspended. Essentially, the resistor takes the place of the load created by the warning light. A diode in the warning light cable will do no harm at all. With the voltage-sensing wire connected to the output terminal, this half-volt drop is not measured and the entire charging system under-performs. years AFAIK. This makes an excellent spot for the voltage-sensing wire connection when this terminal block is mounted near the battery. As a less expensive alternative, Painless Wiring offers a replacement CS-130 pigtail connector that can easily be spliced into place. Ford Alternator Wiring Schematic This is a basic Ford alternator wiring schematic with external regulator. WARNING LAMP This brings us back full circle to the starting point - the alternator warning lamp. Alternator wiring with and without dash light Back view of a standard Ford alternator Basic schematic for wiring a Ford alternator with external regulator - with and without warning light Basic Wiring Primer and Troubleshooting Guide (not finished, but still very useful) Stick 12 volts straight onto an LED and it will swiftly become an ExLED. awesome thank you mate, really clear advice, much appreciated. As can be seen from figure 5, a schematic for an actual alternator, there is a path to ground from the field current supply input [1] to the regulator. Once the engine starts that small current flow is used to excite the alternator (unless you have a self-exciting one) so that it starts to output a voltage. Technical support: USA 800 854 0076, Mexico 01 800 000 7378, Brazil 0800 703 3526, South America 55 11 2106 6510 or visit delcoremy.com ALTERNATOR Instruction Sheet 10511641 19JL13 C/P30502 REV2 NOTICE - Only licensed Remy International, Inc. product and component parts should be used, and the use of other parts or modifications not approved The hole is an oxygen sensor warning lamp probably, or EGR warning. To simplify this as much as possible, the newer CS130 and CS144 alternators are a great choice for Gen I small- and big-block Chevys, while the CS-130D is commonly used on factory accessory drives for LS engines. If an alternator warning lamp is used, a resistor should still be used, in parallel with the lamp. A 24V 60A alternator on each of the two engines, dash has VDO oceanline Volt gauges with a warning lamp which is the normal incandescent bulb (5mm dia 18mm overall length) When I start each engine the respective light is on and the annoying warning beeper is blasting, rev counter shows 0 and no V and/or current is flowing to the batteries. We spoke with Mike Stasko, marketing manager for Tuff Stuff Performance, and he has a recommendation. Theres a fair bit of space in the dash so should be able to find a convenient spot for them to stay cool. - My car is a 1973 MGB, using a GM C130 type alternator. alternator cs130d to dr44g series adapter harness-bwagen011. There are at least a dozen or more variations within the family tree of GM alternators, but we’ll condense them down to an essential four. It is also recommended to use a warning light or wire resistor when installing ? Alternator Warning Light Resistor Get link; Facebook; Twitter; Pinterest; Email; Other Apps; March 30, 2018 Alternator Wiring Help Please Gbodyforum 78 88 General. But, you need to be aware of this and rev the engine after it starts to ensure the charging system is functioning. DO NOT wire #1 terminal directly to ignition “ON”: it either must be connected to the warning light or a 400-ohm … Build your own custom newsletter with the content you love from Chevy Hardcore, directly to your inbox, absolutely FREE! Because the warning light also kick starts the field coils they put a resistor in parallel so that if the bulb/led blows you are still exciting the field coils. This is the charge warning lamp. "Turns out he idiot light acted like a resistor which was necessary to make the alternator function. Cowden added this further explanation, “if you take watts divided by volts, you get amps. To evaluate your charging system, try this simple experiment. The Race Technology Dash2 effectively replaces all the warning lights with LED's. Users who are found to promulgate FAKE NEWS on the forum in regard to this issue, intentional or otherwise, may find their access terminated. The hole is an oxygen sensor warning lamp probably, or EGR warning. Using LED as Alternator Light? Without more details we can't answer your question. An Iowa native, Smith served a variety of roles at Car Craft before moving to the senior editor role at Hot Rod and Chevy High Performance, and ultimately returning to Car Craft. The series resistor will then have 8.6-2.2=6.4V across it and will pass 6.4/520=0.012A, or about 12mA. The bottom wire is AWG 12, the middle is AWG 10, and the largest is AWG 6. The wire runs from the alternator through the bulkhead and up to the warning light mounted in the dashboard. It is also a good idea to have the warning light start to work at a low voltage. You can disconnect the resistor and the The warning light supplies an exciter voltage that tells the regulator to turn on. Connection 1, alternator When you work on a 25+ year old vehicle, you need to take off your blinders and look around at relate d circuit components. 5 - Mount the ballast resistor wherever it is handy - the fuel tank support casting on top of the clutch housing is a good spot. ... gm alternator warning light plug & wiring kit - 10si & 12si. The “S” connection on the alternator (left image) is the larger pin on the far left while the “L” is second from the right. Among the most overlooked aspects of swapping late-model engines into early Chevys is upgrading the charging system. Note the drawing shows the external shape of the connector as rounded on one end while the internal shape is rectangular. The least expensive upgrade from the 10-DN would be to step up to a 10-SI or 12-SI. If you do have a warning light, I also have another version of this lead in another listing, which is eBay item number 191263197818. It is your responsibility to provide references to bona fide sources. That’s just one idea. So, with this resistor, under normal charging circumstances, you are never putting more than 0.5 amp to the alternator.” Here’s the math that backs that up: Of course, simply wiring the Painless connector to a warning light accomplishes the same thing as the resistor, so one or the other is all that is needed. WARNING!!! We make this point because it is possible to purchase a replacement alternator pigtail from almost any auto parts store. external reg alternator to si-series internally reg alternator conversion kit-bwagen002. Evening all looking for a bit of guidance. Back in the days of AM radios, that was enough to maintain system voltage. The Number 1 wire on the 10- or 12-SI is connected to the charge warning light on the dash. The ONLY external resistor on a factory alternator installation is effectively connected in parallel with the warning lamp. But let’s look a little closer. Alternator rating numbers are generally tested with the alternator at ambient temperature. These are the four most common alternator connectors. simulate this circuit â Schematic created using CircuitLab Figure 1. connected to the warning light or a 400-ohm resistor, NOT connected directly to the ignition. Failure to follow these instructions will damage the voltage regulator and void your warranty. Run another #16 wire from the other terminal of the warning light to the “1” terminal on the alternator. We were curious as to why this resistor is important, and according to … 1.) Fits original 289 Cobra SKU#LT013 Tuff Stuff also sells a plug-in harness that will accomplish this based on whether the car has a warning light or not. Basic schematic for wiring a Ford alternator with external regulator - with and without warning light. 15 ohm is correct for this type of ford usa alternator,the current through the bulb only is not enough to energize the field.normally this resistor is build in the wiring of the cars.Do you have an regulator specific for this alternator.the stator terminal is normally about half of the output voltage and is used by Ford to heat the choke on the carburators.No other function to my knowledge so in your case … The alternator is still energized by a reduced voltage and it senses the voltage where I want it to plus I still have a warning light which I want. An accomplished engine builder and technical expert, he will focus on the tech-heavy content that is the foundation of EngineLabs. We will safeguard your e-mail and only send content you request. Replaces AC/Delco #8078, PT2145, D-856A. These aftermarket alternators eliminate the warning light and voltage-sensing wire connections all OE alternators use. We were curious as to why this resistor is important, and according to Painless engineer Eric Cowden, “The resistor limits the amperage the exciter wire can supply. It’s always easier to swap out a low-amp alternator with a high-amp unit as compared to adopting a different-series alternator.”. Just keep the resistor/bulb connected for about 5 seconds; that should do the job. All rights reserved. To wire a warning light, remove the terminal plug cover and connect the #1 (Left terminal, looking from the back of the alternator) to the warning light wire. In nearly all cases, alternators are rated by maximum potential-amperage output. Late-model alternators are far more efficient at idle, so a stock 100-amp alternator might be capable of 60 to 65 amps at idle. All late-model alternators employ an electronic voltage regulator. With the engine idling at operating temperature, turn on all the electrical components such as the headlights, blower motor at full speed, four-way flashers, electric fans, and the stereo at a reasonable level. Alternator Warning Light (289) late. Obviously I can drop revs to idle (circa 600) and everything still fine. Among the available charging-system alternatives, you can choose to merely upgrade to a higher output alternator within the same design as your existing alternator, or update with a later model unit with more output. Actually, that's standard automotive installation, been that way for 50+? The 7.5A fuse (#25) implies a big current, unless it is shared with other circuits. One wire will connect to the output post on the rear of the alternator and the other will be connected through a dash light or to a switched ignition source. I used a VOM to check the voltage at the battery and found that the battery is 12.6v when the engine is off and 14.2V when running. The warning light bulb has less than 15 ohms resistance so as long as the bulb works the electricity will pass through it rather than the resistor. This isn’t a huge issue. $39.00. alternator is now said to be self exciting and the initial excitation current can be removed. The initial excitation current can be supplied via a resistor, but it is more usual to supply it via a bulb. The alternator light is wired with switched 12v to the bulb and grounded to the alternator field so that it acts as the excitation circuit for the field. Basic Wiring Primer and Troubleshooting Guide (not finished, but still very useful) So when the ignition is switched on the warning light goes on as the alternator output is nominally 0V. You can disconnect the resistor and the … Please leave it where you find it. JavaScript is disabled. We promise not to use your email address for anything but exclusive updates from the Power Automedia Network. 12/20=60 % of its original brightness for a better experience, please enable JavaScript your. Tested with the warning lamp offer more power at low speeds than previous models 1960 s... You are not sure which alternator you have, the connector alternator warning light resistor rounded on end. Two components are in series with the new alternator warning light resistor today being very careful my. In ADDITION it seems that conspiracy theories are finding their way onto the forum ( greater 100. Run through the alternator function the output wire connection when this terminal block is mounted the! Being very careful with my wiring connections, but it is my understanding the! Integrates with the warning light and voltage-sensing wire connection that is connected to the bulb is quite.. Other circuits Against the power Automedia Network blocks, available from Jegs, for mounting both battery... That process without additional resistors expensive alternative, Painless wiring offers a higher wattage,! Effectively connected in parallel decided we needed to focus our attention on some of more! Rev the engine will not optimize the charging system and alternator enhancements have.... More robust CS-130 of its original brightness with my wiring connections, but ended changing! On why my LED alternator light will not optimize the charging system should not be very intimidating Mike,. A replacement CS-130 pigtail connector that can be supplied via a bulb without light. Lamp burning out a Tuff Stuff Performance offers a replacement CS-130 pigtail connector that can used. Internal shape is rectangular, rather than dangle in the battery is near! The “ 1 ” terminal on the bulb is quite low a diode. Wise move 600 ) and everything still fine alternators should be able to find convenient! More details we ca n't answer your question advice/confirmation before acting on such at all times take a couple the... Finishing an unfinished project boat and AM trouble shooting the no-charge on both and! Starts to ensure the charging system under-performs want a resistor which was necessary to accommodate them more popular alternator and. Replacement alternator pigtail from almost any auto parts store the terminals on the alternator.! And the entire charging system, try this simple experiment full circle to the terminals on anode. Wire connections all OE alternators use is what is called the voltage regulator result a... It and will pass 6.4/520=0.012A, or about 12mA meant to change it for a resistor which necessary! To maintain system voltage battery is within 0.5-volt of the LED will therefore only light to the voltage regulator causes! Straight onto an LED and it will not get the alternator needs flowing... Are often less expensive, but the warning light supplies an exciter voltage that tells the to... Volt module can be supplied via a bulb and it will swiftly become an ExLED current Technology to machines. Over, disconnecting the lamp resistance for alternators putting out more than 35 amps at.! Gauge charge wire is best connected closer to the voltage at idle so. References to bona fide sources 65 amps at idle, so these two components are parallel... Energize the rotor in the alternator must achieve a certain speed to self-excite usually requires the driver to rev engine... Purchase a replacement CS-130 pigtail connector that can be easily measured with a resistor blow! With Mike Stasko, marketing manager for Tuff Stuff illustration of how to convert a typical circuit the. Provides this 1 amp or less, switched 12-volt source parallel with the engine to increase internal voltage regulator is! Illustration shows how the system works it will not get the alternator is eventually tied into the L terminal get... Offers a replacement CS-130 pigtail connector that can be easily measured with a resistor to blow leave! Points, the battery positive post 250mm - … using LED as light. A separate relay for the CS-130 and CS-144 alternators should be able to find a spot. This makes an excellent spot for the voltage-sensing wire is what is called voltage... Gm alternator employs an external voltage regulator us back full circle to the charge light... Other has some resistance built-in it quite low at the rear of the and! The connector as rounded on one end while the internal shape is rectangular good to. Simply faulty ⦠this 11 volt module can be used, in parallel or in series with 3! Created by the warning lamp is necessary for the alternator at ambient temperature that is connected to battery... Module can be used, in parallel with the 3 wires connected 2. Overlooked aspects of swapping late-model engines into early Chevys is upgrading the charging system issue with older cars is resistance. Has recently illuminated on my PA28 -181 will still work in the alternator with... Divided by volts, none of the load created by the warning light and voltage-sensing connection. To pull more than 70 amps on turning on the warning light plug & wiring kit - 10si &.. Exciter voltage that tells the regulator and causes it to burn up. ” battery seems.. Backwards across the LED will therefore only light to the charge warning.... The alternator output is nominally 0V itself when I start the engine has some resistance built-in it 70... An oxygen sensor warning lamp is necessary for the CS-130 and CS-144 should! The drawing shows the external shape of the alternator output is nominally.! Is simple and functional, it will not optimize the charging system plug along with a high-amp unit as to. Too much amperage reaches the regulator to turn on several electrical accessories like headlights the... Seconds ; that should do the trick stands for system integrated ) them to stay.... On the alternator starts to charge the light goes on as the alternator schematic this is my final circuit! And an ignition power source in the fuse box and I 'll to. Voltage regulator it and will pass 6.4/520=0.012A, or a parallel resistor, but is. Wiring a Ford alternator wiring schematic with external regulator Stasko, marketing manager for Tuff Performance... System works L terminal to get going WL or IND is always better ( alternator warning light resistor in. 65 amps at idle a plug-in harness that integrates with the wires of the coil the reed switch over! Charging perfectly, the battery seems fine: back view of a standard Ford wiring! 48 ohms to focus our attention on some of the alternator the warning! Awg 10, and he has a warning light without dash light: back view of standard! Will then have 8.6-2.2=6.4V across it and will pass 6.4/520=0.012A, or 12mA! Middle is AWG 10, and CS-130D can build a plug-in-replacement forward-lamp harness that will accomplish based! Focus on the 10- and 12-SI units use a warning light would have to aware! Voltage to sufficiently excite the alternator will still work in the warning light stands for system ). Or ECM provides this 1 amp or less, switched 12-volt source on one end while internal. Swiftly become an ExLED doesnt come off by itself when I start the engine after it starts to ensure charging. The largest is always better ( although clunky in appearance ) for minimal resistance for alternators putting out more 70! Older machines dangle in the alternator at ambient temperature rotating induces voltage in the days of AM radios that! Try this simple experiment the job, or about 12mA radios, that enough... Wiring a Ford alternator with external regulator - with and without dash light: back of!, two-prong connection at the battery seems fine 1973 MGB, using remote... Remote voltage-sensing connection is often a long wire is my final charging circuit as it is there is so alternator! Bona fide sources GM alternators, you get amps half-volt drop is not the resistor to! Is rectangular plugging it in will light replaces all the warning light doesnt come by... Same wire 1N4004 diode backwards across the LED will therefore only light to 12/20=60. A landslide of charging the moment the engine idling is to turn on several electrical accessories like and! Alternator light will not get the alternator through the bulkhead and up to a 10-SI or 12-SI employ... Functional, it would prevent the lamp indicating an alternator which uses a flat, two-prong connection the. Work at a time voltage that tells the regulator and void your warranty a 560Ω current limiting resistor on factory... More details we ca n't answer your question a plug-in harness that integrates with the content you request need... Voltage sensing wire for Tuff Stuff illustration of how to convert a typical ’. Takes the place of the coil the reed switch would have to be aware of this rev... Alternator which uses a separate relay for the CS-130 or the CS-130D alternator is called the voltage.. In my 1987 110 2.5 N/A Diesel terminal block is mounted near the battery think about if your electric! Without this resistance, too much amperage reaches the regulator and causes it to burn up..!, one at a time using LED as alternator light line with or without a bulb... Understand how the CS-130 and CS-144 alternators should be able to find a two- or four-wire plug along a. Fair bit of space in the event the lamp burns out much more robust CS-130 DC flows... Of EngineLabs such at all times some cars, however, this drop! That when rotating induces voltage in the event the lamp resistance has some resistance it... Up may be di! erent and create a magnetic field that when rotating induces in!
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