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Putco LED Light Bulb Load-Resistor Kit - Aluminum

Item # P230004A

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Putco Accessories and Parts - P230004A
Putco Lights - P230004A

  • Lights
  • Load-Resistor Kit
  • Putco
  • Aluminum
Guard against LED-related turn signal problems with this load-resistor kit. Simple, effective system builds resistance that corrects flash timing, thereby preventing the "hyperflash" phenomenon that occurs with LED indicators. Call 800-298-8924 to order Putco accessories and parts part number P230004A or order online at Free expert support on all Putco products. Guaranteed Lowest Price and Fastest Shipping for Putco LED Light Bulb Load-Resistor Kit - Aluminum. Accessories and Parts reviews from real customers.

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  • Reviews (2)
  • Q & A (67)
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Putco Accessories and Parts - P230004A

Guard against LED-related turn signal problems with this load-resistor kit. Simple, effective system builds resistance that corrects flash timing, thereby preventing the "hyperflash" phenomenon that occurs with LED indicators.


  • Fixes hyperflashing or burned-out bulb indicators on turn signals with LED lights
  • Has compact design for tight applications
  • Installs quickly and easily
  • Works with most import and domestic vehicles
  • Constructed of aluminum


  • 6 Ohms
  • 50 Watts
  • 1-Year warranty

Please Note: One kit is required for each LED bulb used in turn signal applications.

Because LED bulbs have little resistance on their own, they create a "hyperflash" situation when used in turn signals. This fast flashing is similar to what your factory signal light does when the bulb is about to burn out. To prevent this phenomenon, install a load-resistor kit along with your new LEDs. This kit will build additional resistance in the line to correct the flash timing, resulting in a properly functioning indicator.

230004A Putco LED Light Bulb Load Resistor Kit - Aluminum

P230004A Installation InstructionsInstallation Details P230004A Installation instructions

Customer Reviews

Putco LED Light Bulb Load-Resistor Kit - Aluminum - P230004A

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

Guard against LED-related turn signal problems with this load-resistor kit. Simple, effective system builds resistance that corrects flash timing, thereby preventing the "hyperflash" phenomenon that occurs with LED indicators.

- P230004A


This product made its way to South Africa were I installed it on a boat trailer with led rear lights with excellent results, no more pulsing of the led's This is a great inexpensive way to solve any pulsing of LED's on trailers 55787

- P230004A


Quick and easy install. 213842


Ask the Experts about this Putco Accessories and Parts
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  • Why Do LED Taillights on Vehicle Cause "Bulb Burned Out" Message on Dash
  • When you replace incandescent bulbs on a vehicle's turn signal circuit with LEDs the blinker circuit doesn't want to work right. This is due to the amperage rating being too low on the LEDs and thermal flasher units needing to see a specific amperage rating to work right. Now with some vehicles if the circuit doesn't see a specific amperage load on the circuit it thinks the bulb has burned out. The LEDs will cause this. A load resistor puts that same amperage back on the circuit so that...
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  • Are Load Resistors Required when Adding LED Lights to a Trailer
  • You may not even need load resistors to switch to LED lights. The best thing to do is to try the lights without load resistors first. No need to purchase something you may not need until you know need it. Load resistors such as aluminum # P230004A and ceramic # P230004C dissipate heat through the body of the resistor. Wrapping them with insulation would prevent them from dissipating heat properly. You could put them in a battery or junction box though. Load resistors increase the...
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  • Using an Adapter to Tow a Trailer with LED Lights with a 2012 Mercedes GL450
  • Yes. If your trailer with LED lights has a 5-Way or 4-Way flat connector then you would use adapter # TR20141. If the trailer has a 7-Way connector you would need # C57003. These adapters have load resistors in them that provide additional power draw so the vehicle thinks there are incandescent lights on the trailer. The other option is to install load resistors, # P230004A, in line on each circuit on the trailer wiring behind its connector. You can also use this method if the resistors...
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  • Trailer Lights Not Working Using 4- to 7-Way Adapter on a 2012 Mercedes GL450
  • If the trailer has LED lights then the issue isn't the adapter or the trailer. It is the vehicle. The 2012 Mercedes GL450 and other German vehicles do not work well with trailers that have LED lights. This is because LED lights do not draw enough power for the tow package on the vehicle to recognize them. Usually this is accompanied by a bulb out sensor light in the vehicle. The fix is to use a special adapter such as # TR20141. Or, if this is the adapter you are using then adding load...
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  • Troubleshooting LED Trailer Lights that Flicker When Vehicle is Off
  • What you are experiencing is due to the fact that LED taillights only require a very small amount of amperage to illuminate. A tiny amount can cause them to illuminate. Trailer wring for the most part goes totally dead when the vehicle is off. But there can be small amounts of voltage that would normally not get noticed if the trailer had incandescent bulbs. It really isn't a problem unless it bothers you. The flickering wouldn't be enough to drain your battery. But if you want it to...
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  • How to Install LED Light Bulb Load Resistor for Use with Trailer with LED Lighting
  • The Putco LED Light Bulb Aluminum Load-Resistor Kit # P230004A wires in parallel with each trailer lighting circuit. For a trailer with LED lighting (that does not present the same electrical load as an incandescent type bulb) you will wire one resistor inline with each circuit, so for a typical 4-pole installation you'll need three, for left turn/stop, right turn/stop and running light circuits. The kit includes quick-splice connectors.
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  • Turn Signals Hyperflashing on a 2011 GMC Sierra Denali 3500HD
  • As you probably know, adding LED lights can cause a hyperflash problem with turn signals. You would need to add a load resistor like # P230004A to every light that was changed to LED. You have to make sure that the load resistors are installed correctly. One wire will connect to the power wire going to the bulb. The other wire you will ground to the truck frame or grounding point. I have included a picture that shows how it should install.
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  • Troubleshooting LED Trailer Taillights that Stay Dimly Lit
  • Since it only takes a tiny amount of voltage to illuminate an LED what you are seeing is normal. The tiny bit of voltage present on your trailer wiring harness is illuminating your LEDs slightly. What you can do is install load resistors on the circuits of your trailer that are dimly lit and the problem will go away. For that you would want the part # P230004A. My contact at Curt stated that the small amount of power will not drain the vehicle battery since it is much a minute amount...
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  • Left Blinker Flashes Fast After Installing Trailer Wiring Harness on a 2014 Chevy Camaro
  • In order to determine the functions of the wires on your 2014 Chevy Camaro you will need to use the included circuit tester that came with # 119147KIT. What you are describing sounds like hyperflashing which can happen when using LED lights but usually not stock LED lights on a vehicle. If the issue is happening on a trailer then the hyperflashing is a result of not enough load on the system. Installing a load resistor such as # P230004A in line of the affected circuit would cause more...
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  • Why does the # P230004A Load Resistor to Prevent Hyper Flash Turn Signal Get So Hot
  • The Putco LED Light Bulb Load-Resistor Kit - Aluminum, item # P230004A, is designed to get hot. It can be explained like a dam. The result of a dam holding back water is pressure, so the dam has to be built to withstand that pressure. The load resistor is holding back power and the result of holding that power back so it does not get to the LED lights is heat. The load resistor is built to dissipate the heat caused by holding back the power and aluminum transfers heat to the air around...
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  • Dim Taillights On Vehicle Troubleshooting After LED Conversion
  • Did you install load resistors on the circuits like the part # P230004A for each of the circuits that have a blinker on them? What you described sounds like bad grounds or bad wiring. A very dim LED typically means it is picking up a very tiny amount of voltage on the circuit. Typically you wouldn't see this illumination with an incandescent but since LEDs can light up with the smallest amount of voltage the problem usually appears with an LED conversion. Your best option is going...
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  • Should Load Resistors be Grounded to the Vehicle Frame or an Existing Ground Wire
  • The ideal location to ground anything would be to the metal frame of the vehicle in the nearest corrosion free bare metal surface. However, if there is a ground wire near by you could try it out and see if it offers a sufficient ground. If you still get hyper flashing then a better ground location could be needed. I have included a link to the installation details for the load resistor # P230004A for you. These resistors are also available in a pair, # P230004A-2.
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  • Load Resistors for LED-Light Trailer Towed by 2017 Audi Q7 with Factory 7-Way
  • I cannot speak for Audi in terms of any progress they've made with the compatibility of their OEM wiring with LED-equipped trailers, but we do offer the Tow Ready adapter # TR20141 you referenced. This will carry your lighting and reverse lockout signals in the 5-pole format. If this does not work for you the other option is to wire in load resistors in front of each LED light on the trailer. Load resistors like ceramic # P230004C or aluminum # P230004A can mimic the electrical characteristics...
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  • Installing LED Front Turn Signal and Running Lights and Resistors on a 2007 Nissan Frontier
  • It sounds as if you have a wiring issue. When installing the Putco 3157 LED Bulbs, # P233157A360, on your Frontier, you will need to keep in mind that this bulb is a two filament bulb and has two circuits going into the bulb. The 3 wires you are seeing should be two 12 volt wires and one ground wire. Use a circuit tester, item # ALL640595 if needed, and determine which wires are which. You should get one wire with turn signal and one wire with the tail light signal, the third wire being...
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  • Options for Preventing Bulb Out Sensor on Vehicle When Towing Trailer with LED Lights
  • The only vehicles where LED trailer lights becomes an issue are German vehicles. Your 1997 Ford F-350 would not have any problems at all. For those vehicles we have the part # TR20141 which plugs into a 7-way and provides a 4-way for the trailer or part # C57003 which has a 7-way for the trailer and for the tow vehicle. Your other option is to install load resistors like part # P230004A on the turn signal/stop circuits and on the running light circuit.
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  • Aluminum Versus Ceramic Load Resistors for Replacing Incandescent Lights for LED Lights on RV
  • Load resistors such as aluminum # P230004A and ceramic # P230004C, will get hot as they do their job of absorbing power (providing resistance). Both will work fine for helping a wiring harness work well with low-power-demand LED type trailer lighting. The difference between them is that the aluminum resistors will be able to more quickly dissipate that heat to the surrounding air. The aluminum housing will release it's heat better since the material itself is more conductive of heat...
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  • Lamp Out Warning Light Comes on with Headlights on and Left Turn Signal Engaged
  • Is this only happening when towing a trailer? If so it could be a few different things. First, if the trailer has LED lights the low power draw of the LED lights could confuse the vehicle computer. To simulate more load you would add a load resistor, # P230004A, to any affected circuit. It could also be a poor connection caused by dirty or corroded trailer connectors. Make sure that the vehicle and trailer side connectors are clean and free of corrosion inside and out. Also make...
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  • Load Resistor Recommendation to Install Bargman 47-84-009 on a Motorhome
  • What you would need to do to be able to install LED taillights on your motorhome that originally had incandescents would be either to install a different flasher unit like you mentioned or to install load resistors on all of the circuits that flash intermittently (blinkers/flashers). We don't carry the flasher units so the best solution I can give you would be load resistors. For that you would want the # P230004A. You would have no issue towing a trailer with incandescent bulbs with...
    view full answer...

  • Troubleshooting Brake Lamp Failure Light On 2016 Ford Escape With Trailer Connected
  • There can be a couple of reasons you are getting a brake lamp failure on your 2016 Escape. Either a brake light is really out on the trailer or you can have a ground issue which can cause all sorts of issues. I recommend using a circuit tester like part # 40376 to test the pins on the trailer connector on the Escape. If that checks out, you can use a 12V battery and test the trailer connector. If everything checks out another possibility is that the trailer has LED lights. LEDs...
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  • Wiring Optronics Oval LED Trailer Turn Signal and Parking Light as a Vehicle Front End Replacement
  • When wiring the Optronics Oval LED Turn Signal and Parking Light, part # STL78AB, you will want to connect the red wire from the light to the turn signal wire from the vehicle and the black wire from the light to the parking light wire from the vehicle. Then you should ground the white wire from the light to the frame of the vehicle or another good ground source. This may not be an issue on the front end of your vehicle, but you may want to test the circuit you are attaching the red...
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  • Should Load Resistors Prevent Hyperflashing
  • LED lamps draw only a fraction of the power that an incandescent lamp would. If the vehicle has a bulb-out sensor, the turn signals will blink rapidly, or hyperflash because the vehicle thinks you have a burned out bulb. Using a properly installed load resistor will eliminate this problem. If the resistor is incorrectly installed, the lamp will still hyperflash. I've provided you an install diagram showing the proper installation of the load resistor. Review your installation to make...
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  • Are Load Resistors Needed for an LED Light Kit on an RV
  • If you experience hyper flashing when using a turn signal then you would need to use a load resistor on the turn signal circuit. You would just need one per affected circuit. the brake lights, running lights, and backup lights do not need load resistors the vast majority of the time. Just the turn signals. The difference between the ceramic ones such as # P230004C and the aluminum one # P230004A is how well they dissipate heat. Aluminum dissipates heat better.
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  • Replacement LED Tail Lights on a 2007 Dodge 3500 Trips Bad Bulb Notification
  • It is possible that the resistors you are using are not the exact right type for this application. We do have resistor-kits for this exact purpose. They are Putco Resistor Kits part # P230004C for a ceramic housed resistor or part # P230004A that uses an aluminum heat sink. These resistors should solve your problems.
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  • Installing A 3rd LED Brake Light In A 2-Wire System Designed For Incandescent Bulbs
  • When you turn on the running lights there is more of an amperage draw so that is why the system changes at that point. For your 3rd brake light, I recommend first disconnecting it from your current wiring. Then I recommend using the Vehicle to Vehicle Tail Light Converter # 118158 to splice into your combined right/stop and left/stop wiring. Then connect your 3rd Led brake light to the stop output on the converter. If there is hyper flashing on that third brake light at that point,...
    view full answer...

  • LED Trailer Lights Flickering When Towed by 2015 Audi Q7
  • Since Adapter # TR20141 did not work to stop the flickering of your trailer's LED lights, what you need to do is install Load Resistors # P230004A or # P230004A-2 for a quantity of two. You will need one load resistor for each affected circuit.
    view full answer...

  • Is It Normal For Load Resistors To Build Up Heat?
  • The Putco LED Light Bulb Load-Resistor Kit - Aluminum # P230004A will build up heat. The reason why they have the built in fins is to help dissipate that heat. If they are getting really warm, you should put a multimeter like # ALL648349 on them and make sure that the wire coming into the resistor is functioning correctly.
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  • Need to Separate My Turn Signals and Brake Signal on a 2008 Dodge Ram 2500.
  • Although typically used to convert a system from a tow vehicle to a towed vehicle, the use of the Vehicle to Vehicle Taillight Converter, # 118158, would work for you. When a vehicle has a combined system, both the left and right turn signal wires also carry the brake signal. With a separate system, the brake light signal is broken out onto it's own circuit. This converter will allow you to convert your combined taillight system to a separate taillight system on your 2008 Dodge Ram. The...
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  • Troubleshooting Trailer LED Lights Not Working When Hooked Up to a 2012 Mercedes-Benz GL450
  • The LED bulbs on your trailer draw very little power and the Lamp-Out sensor in your 2012 Mercedes-Benz GL450 sees this as a bulb that is about to go out. To solve this problem the # TR20141 adapter has resistors to simulate more power draw which usually works. The other solution is to install load resistors like # P230004A on the lighting circuits. Since the adpater didn't solve your problem you'll need to install the resistors.
    view full answer...

  • Recommendations To Solve LED Trailer Lighting Issue With 2007 Mercedes Benz ML500
  • If your vehicle already has a working 4-way, then I recommend using the Putco LED Light Bulb Load-Resistor Kit - Aluminum # P230004A on your trailer. These load resistors create more draw on your wiring to resemble an incandescent light pull for the LED lights that require far less power. You will need 3 of these on the trailer side of your 4-way connection. If you don't have a 4-way on your 2007 Mercedes Benz ML500, I recommend the Upgraded Heavy Duty ModuLite Circuit Protected...
    view full answer...

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