1. Wiring
  2. Tow Ready
  3. Trailer Connectors
  4. Converters
  5. 2-to-3 Converter
Vehicle to Vehicle Tail Light Converter

Vehicle to Vehicle Tail Light Converter

lowest price pledge
Retail:$36.14
Our Price: $28.91
You Save: 20%
Wiring
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.47 lbs
Quantity: 
Tow Ready Wiring - 118158
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Videos

Used when a motorhome with a 2-wire system is towing another vehicle with a 3-wire system, by way of a tow bar. Lowest Prices for the best wiring from Tow Ready. Vehicle to Vehicle Tail Light Converter part number 118158 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (118)
  • Q & A (545)
  • Photos
  • Why etrailer?

Tow Ready Wiring

  • Trailer Connectors
  • Converters
  • 2-to-3 Converter
  • Tow Ready

Used when a motorhome with a 2-wire system is towing another vehicle with a 3-wire system, by way of a tow bar.


Features:

  • Used when a motorhome is towing another vehicle by way of a tow bar
    • If the towing vehicle has a 2-wire system and the vehicle being towed is on a 3-wire system (the vehicle has amber turn signals, separate from the brake signals), the vehicle to vehicle tail light converter will need to be used
  • This item cannot be installed backwards (the input going to the output side) to convert a tow vehicle down
  • Will not work with vehicles that have LED tail lights
  • Limited 1-year warranty


Note: You will need to install a tail light isolating diode system (38955) and 2 additional diodes (RM-792) with this tail light converter to prevent electrical feedback when flat towing a vehicle. Vehicles with separate turn signals and brake lights will need a total of 6 diodes.



118158 Vehicle to Vehicle Taillight Converter

Replaces 31820

Item # 118158

Installation Details 118158 Installation instructions


California residents: click here



Customer Reviews

Vehicle to Vehicle Tail Light Converter - 118158

Average Customer Rating:  4.8 out of 5 stars   (118 Customer Reviews)

Used when a motorhome with a 2-wire system is towing another vehicle with a 3-wire system, by way of a tow bar.

- 118158
by:

The "Vehicle To Vehicle Tail Light Converter", Item #118158 is serving my needs well. I refitted my trailer completely using all LED lights. I mounted the converter inside the "C" channel underneath my tongue mounted toolbox for a little added protection. I also soldered all connections throughout the re-wire and used heat shrink &/or liquid rubber over all connections. I feel that proper planning prevents poor performance. I ordered numerous lights from etrailer also, and all are working fine. When I chose to call them with a question about one of their products, it was answered quickly and appropriately. I am a business person, and that's customer service!


Comments
The tail light converter is still working fine. I have no regrets.
Jim R - 04/06/2021


- 118158
by:

This product works well with some thought and acknowledgement that it has limitations. I have just bought my second one. The previous one failed after five years. This new one etrailer recommend the use of diodes to prevent feedback to the towing vehicle. This is not a bad idea but was not previously available. The circuit diagram that comes with this unit was misleading to me. Eventually I figured it out and will passon what I learned. My trailer has separate orange indicators. It is wired as all my trailers are with a seven way plug. You will see each diode having three connections. Two from the towing vehicle and one to the indicator bulbs. I just used one of the diode input tags connected to the appropriate wire from the seven way. The output I fed to the indicator bulbs. I have three indicators on each side of the trailer and they can all run off of the same tab. I am enclosing a few pictures. The first one is the old unit which was housed in a separate box screwed to the chassis. Then I had a second box which held all the connections. The second picture shows the new unit contained in its own box with the five diodes used. The box is just a plastic project box from Radio Shack. The last picture is of the finished unit all sealed and ready to go. Now for those limitations. Do not expect this to work as though it were an extension of a four wire vehicle. The indicators will work and the brake lights work BUT the indicators go off when the brake is applied. The unit cannot run the separate indicator and the brake at the same time.



- 118158
by:

I gave up trying to find a wire to tap for a third brake light on a 2013 GMC Sierra, so I ordered a 2 to 3 wire adapter ( #118158) as recommended by you expert Michael H. He stated that only one of the inputs was needed, but both Left and Right turn were required to make mine work at all. That aside, the product was received quickly and installation was simple using the enclosed diagrams. I have never seen anything mentioned anywhere about waterproofing undervehicle connections. I do and they last for years.


Comments
Does the 3rd brake light flash when using the hazard lights?
-- comment by: Sam - 05/06/2015


Comments
Yes, emergency flashers will flash the third light also.
-- comment by: - 05/24/2015



- 118158
by:

I have used etrailer many times and have always been satisfied. If you need parts for campers, towing, etc., this is the place to go.



- 118158
by:

I installed a European 13pin receiver on a 2018 Ford Explorer and stowed the wiring adapter under the vehicle. Worked flawlessly so far with caravans and bike carriers.


Comments
Still working flawlessly, even with lots of snow, ice and sludge
Christian G - 03/01/2021


- 118158
by:

This converter worked great for what I intended it for. I was wanting to add a third brake light to back of my fifth wheel trailer. I purchased STL179RB Glolight Thinline LED also. I tried to wire this direct. It won't work, it flashes when you turn the turn signal on. A friend of mine recommended this after doing a search on the etrailer website. Etrailer support recommendation was installing two lights. Duh! that's why I wanted a third brake light, I already have two lights that function as stop/tail/turn. The installation in these pictures is not complete. I was trying to avoid drilling holes in the back of my trailer, I still may have to. I am going to enclose the wires going up the trailer to the light in some white wire loom. The light at present is secured with only white RTV, not sure that will hold. I'm still trying to avoid drilling new holes, may have to though. I hooked up all the wires on the input side, white to ground, green to right stop/turn, yellow to left stop/turn. I hooked only the red wire to red wire of the light on the output side. I hooked the ground (white wire) of light to input side of converter. Yes, it works and no it does not blink when either blinker is turned on. The additional two wires on the output side of converter are not being used nor is the additional wire of the light. Sorry for the long review, don't usually write reviews at all. Anyway, if this will help even one person it will be worth it.



- 118158
by:

I use Optronics oval LED lighting exclusively and I don't think this was made to work with them because of the rapid response of the LEDs. I use this so that on a 4 wire system I can have turn signals on the side of the trailer. When you first hit the brakes, there is a fast blip of light from the side marker/turn signals. With an incandescent bulb it would be too fast to light the bulb. This is something I can live with. I think this works great with no problems so far.



- 118158
by:

Used to add little LED marker turn lights on the corners to vintage two circuit airstream trailer. The led corner lights now are red running at night, red stopping by day and switch to yellow, when turning, day or night.



- 118158
by:

First off the customer service at etrailer is by far the best that I have dealt with. If I had a question, they sent me an email response very quickly. Secondly, the shipping is extremely fast. I placed the order and it came to an APO AE address (military stationed in Germany) via USPS Priority Mail and it arrived in like 5-7 days, I was shocked when it arrived, because I was expecting at least another 3 or 4 days. So, as far as the product. Works great and was just what was needed. Project was to make an adapter that I could plug into my 2017 Jeep Grand Cherokee U.S. spec and use a German trailer. My friend did all of the wiring and made the adapter, so I do not take any credit for any of it. Just sharing this, to those trying to figure out if it can be done. Moving on, the adapter is a 7 pin/blade normal American plug that goes into the back of the JGC and the other end of the adapter is the 13 pin German (European) socket. We tried it without this product and all worked except when you hit the brakes the brake lights were faded and the blinker lights were lit up as if they were the brake lights. So, had to get this product and separate the brake/blinker light on the American side and have separate brake and turn wires on the German side. Put this product between the two in the middle of the adapter, wired it up and all works great! I used 2 zip ties around the product and a bunch of electrical tape to hold it to the adapter, at least to give it a better look. Now I only have to plug in the adapter whenever I use a German trailer and all works correct. When done towing, remove the adapter and everything is back to the American system. Did not have to cut/splice or do anything to the wires on the JGC or the trailer, all was done at the adapter. Thanks again to etrailer for providing awesome customer support and shipping! Jeff



- 118158
by:

Interested in adding a third light up higher on your trailer for additional visibility? This product will separate the turn signal and brake signal on a four pin connector so you can add a running and brake light up higher to be visible. Simulates the third light that most cars and trucks have these days in the center of the back window. Positive for the semi-trucks visibility. You do not really think they can see the normal trailer lights 12" off the ground when following close behind or coming over a hill do you? Included a picture with just the running lights illuminated. Thank you etrailer for having the right products in stock! Most other dealers did not know what I was talking about and one even told me it was against the law. Called state highway patrol and they encouraged the additional third light! I also added the higher side running lights when semi's are merging behind you at night.



- 118158
by:

Easy install process, reviewed and illustrated in easy to follow wiring diagrams provided in the kit. etrailer on YouTube for the install of this tail light converter was complete and professionally illiustrated



- 118158
by:

Worked just like we needed it to. We used it for LED lights on a trailer we built and so had to add a tiny DC to DC voltage regulator to each light circuit. Use one with 12 Vdc output with as low as 5 Vdc input. Works good!



- 118158
by:

I was looking for a way to add a third tail light to a vintage trailer and this proved to be just the ticket. Easy to install and worked great right out of the box. Plenty of communications from etrailer staff along the way. Just wish they would provide tracking info so you could plan for expected receipt date.



- 118158
by:

This unit made it possible to split up the single wire for the brake and signal. Then made them 2 separate signals so i could hook up a 3 light trailer very nice



- 118158
by:

This converter is exactly what I needed to upgrade my 99 F350 tail lights to LED! The instructions are clear and straight forward. And I didn't need to modify any other part of the truck's wiring. (LED's themselves require a load resister wired in parallel to reduce the electrical current for slowing the flash rate.) Aside from that, this successfully separated the turn signal and brake wires.



- 118158
by:

Great service on a part I wasn't aware was available. Was going to use a 7 pin adapter to power seperate lights on a little camp trailer. This will simplify my needs. Thanks..



- 118158
by:

Shipping was fast. Installation was easy. Works as designed. Couldnt ask for a better result. Now my tow car is all wired correctly.



- 118158
by:

This product works as advertised, no complaints! I did have to do a little research on the different plugs as I was going from an American spec vehicle with the flat pin connector, to a European bike rack. Once I realized I needed to add a second ground wire from the vehicle to the rack, I was able to get it to work.



- 118158
by:

Easy painless installation! I used this product to install a third brake light on my TC Teardrop camper.



- 118158
by:

This product was used to separate the brake light signal from the turn light signal on a Ford F-350 cab/chassis with a flatbed to facilitate using amber turn signals without them illuminating when the brakes are applied (truck only, no trailer). So far they are "functioning as designed" and I'm very happy with the product.


Comments
Still working fine.
Gregory V - 10/09/2019



- 118158
by:

My taillight adapter arrived quickly, undamaged, and exactly as advertised. Prior to ordering, I emailed etrailer.com techs with a question. They responded quickly and with excellent advice. This little converter is simple to install. My trailer has a shared turn signal/brake wire. The adapter allows me to connect a lighted license plate frame that also has a third brake.


Comments
What great customer service! You guys and your products are fantastic. The items I bought are working 100
John D - 03/05/2015



- 118158
by:

I used this to change the wiring and harness on a European trailer to work with my standard US 4-pin trailer outlet. Pretty simple and straight forward with the diagrams and write-ups that I found on this site.


Comments
The parts are still on my European trailer and working well! The trailer is a German brand and started its life there in Germany being pulled by my American-spec Jeep Wrangler. The trailer’s wiring and the Jeep’s connections needed to be massaged in order to work. The parts I ordered from etrailer and the writeups for the project on your site made it all possible. Now the trailer is titled and registered in Virginia and enjoying its life on this side of the Pacific!
Aaron - 03/27/2019



- 118158
by:

We got three etrailer boxes via ups today. The box with the tow bar was damaged slightly so I opened and it seems fine. A bit more reinforcement is called for to prevent shipping damage concerns. Overall purchase experience was very good. I got good answers and guidance and felt valued. I’m planning to do the install myself and I feel comfortable doing so because of all their resources.



- 118158
by:

Added 3rd brake light to my 5th wheel. Simple connections and works great.



- 118158
by:

This is a very useful device for those of us who flat tow auxiliary vehicles, such as a tracker behind a motorhome or whatever. Also it is easy to install. Keith


Comments
converter works well. I have had no problems. I use dielectric silicone grease on all connections.
Keith K - 07/15/2018


43
137
Show More Reviews

Ask the Experts about this Tow Ready Wiring

  • 2-To-3 Wire Adapter To Add Amber LED Turn Signal To Truck
    I have another option but the Vehicle to Vehicle Tail Light Converter # 118158 you were looking at is not compatible with LED Lights. To convert the combined brake and turn signal wiring on your truck to separate brake and turn signal wiring I recommend the Curt 2-To-3-Wire Tail Light Converter # C56196 which we have found to work with LED lights, and will give you the dedicated turn signal wire you need to add an amber LED turn signal to your truck.
    view full answer...
  • Parts Needed to Connect European 7-Pin to U.S. 4-Way Flat
    There are a few parts you will need, and this will require you cutting off your European 7-pin. First, you'll need a U.S. 4-way, the Hopkins Endurance 4-Way Flat Trailer Connector # HM48110, along with Converter # 118158. If you take a look at the accompanying diagram, you can see exactly how to wire the converter to the 4-way and you will need to do this with Butt Connectors - 22-18 Gauge # DW05743-5 and 16-14 Gauge # DW05744-5.
    view full answer...
    Image 1 for
  • Adapter for Truck Wiring To Wire Third Brake Light of Camper Shell
    What you can do is use the converter box part # 118158 wired to either you taillight wiring or trailer wiring and you'll have a dedicated stoplight circuit on the red wire. If you ground the white wire and then run the green wire to the right turn circuit and the yellow to the left turn on the input side of the box the red wire on the output side of the box will have just the stoplight.
    view full answer...
  • Troubleshooting Wiring on a Trailer with Separate Brake and Turn Signal Lights
    There are two things that may help to solve your predicament. The easier one is the converter. The converter that you used, part # 118158, is not compatible with LED lights. So, even if the wires all lined up where they needed to go, it wouldn't have worked anyway. We do have one that is compatible with LEDs, though. It's the Curt Converter, part # C56196. I've linked to a video review of this converter for you to look at. As for the wiring, that's a little harder to figure out. From...
    view full answer...
  • Converter Needed to Have Dedicated Stoplights and Turn Signals on Trailer Wiring
    What you need is a signal converter part # 118158 to take the combined, standard trailer wiring circuits and separate them out so that the stoplight and the turn signals are on different wires. This will give you ability to have dedicated stoplight lights and dedicated turn signals.
    view full answer...
  • Installing Roadmaster Diode Wiring Kit # RM-15267 with Separate Wiring on RV and Towed Vehicle
    If both your motorhome and towed vehicle have a 3-wire system (separate stop and tail lights), then a converter like the Tow Ready # 118158 should not actually be needed. The converter is only needed if your motorhome has a 2-wire system (combined stop and tail lights) and your towed vehicle has the separate, 3-wire system. I have attached a wiring diagram that shows exactly how the kit should be installed for your specific application, where both the motorhome and vehicle have a separate...
    view full answer...
    Image 1 for
  • Why are Diodes Needed for Lighting when Flat Towing a Vehicle
    When a vehicle is being towed it cannot operate its own lights. The diodes are a gateway with 2 inputs and one output. One input is the regular wiring on the vehicle. The other input is from the RV. Since vehicles being flat towed will not have working lights they will have to get power to function from the RV. The diodes allow for 2 inputs so that you don't have to disconnect the vehicle lights to plug in power wires from the RV. The tow vehicle lighting system only matters if the tow...
    view full answer...
  • Trailer Lighting Options for 1962 Airstream Undergoing Renovation
    The vehicle-to-vehicle taillight converter part # 118158 will do what you want: separate the Ram's combined stop/turn signals into separate signals that can be fed to separate stop and turn lights on your vintage Airstream. This converter will not work with a vehicle that has LED lights but it WILL work on a trailer that has this high-efficiency type lighting. Vehicles with LED lights use much lower power signals along with lighter-gauge wiring that would not be able to operate the...
    view full answer...
  • Vehicle To Vehicle Taillight Converter 118158 Buzzing Loudly
    Because the converter box of the 118158 has relays it it, it's not unusual to hear clicking but a loud buzzing noise is not normal. There's two possible causes for the buzzing, and the turn signal issue might or might not be related. Does the trailer have LED lamps? If so, the # 118158 wasn't designed with LED lamps in mind. The buzzing in this case would be caused by not enough power being drawn through the circuits, which could also be a possible cause of the turn signal issue. A poor...
    view full answer...
  • How to Add a Third Brake Light to a Trailer
    To add a third brake light to a trailer is pretty simple, but does require an adapter to convert the signal. Because trailer tail light systems combine the stop lamp and turn signals for each side onto a single circuit, you will need to use a vehicle-to-vehicle tail light converter, part # 118158 to split the brake light circuit back out. The white wire on the input side of the converter would ground to the trailer frame, the green input wire would tap into the right turn circuit...
    view full answer...
    Image 1 for
  • How to Determine the Tail Light Wire Functions on a Vehicle
    The only way to know for sure what a wire does on a vehicle is to test it with a circuit tester such as # 40376. This is because there is no standard for wire color and function and vehicle manufacturers use what ever color they have on hand. Testing the wires is the only way to know their functions. I have linked a video showing how the tester works.
    view full answer...
  • Flat Towing Wiring for Suzuki Samurai with Separate Tail Lights
    Although there are two different methods of wiring a towed vehicle that uses separate turn signals, we recommend using the 6 diode kit part # 154-792-118158, which includes the converter you mentioned. I will link you to several of our flat towing FAQ articles, one of which will tell you exactly how to wire your Samurai. Refer to Option # 2 on the Diode Installation Instructions for a Dinghy with Separate Tail Light Wiring FAQ page. Keep in mind that in addition to a tow bar, base...
    view full answer...
  • How Can I Wire Center High Mounted Stop Light On Truck Camper To R/L Turn Signals
    I was unable to find any definite information about the requirements of a CHMSL on a camper such as you are describing. To have the best information as to the requirements of the areas where you are traveling, I recommend calling the DOTs of the areas where you will be traveling to be familiar with their state and local laws regarding CHMSLs on a camper. To connect a CHMSL to the left and right turn signals, you will want to use a converter, like part # 118158. With this converter,...
    view full answer...
  • Can a Third Brake Light Be Added to a Trailer
    To add a third brake light to a trailer is pretty simple, but does require an adapter to convert the signal. Because trailer tail light systems combine the stop lamp and turn signals for each side onto a single circuit, you will need to use a vehicle-to-vehicle tail light converter, part # 118158 to split the brake light circuit back out. The white wire on the input side of the converter would ground to the trailer frame, the green input wire would tap into the right turn circuit...
    view full answer...
    Image 1 for
  • Can a Tail Light Converter be Used to Put a Third Brake Light on a Trailer
    Using a Tail Light Converter, like # 118158, will work to isolate the brake light signal for a third brake light on your trailer. What you would do is connect the green and the yellow wires on the input side of the converter in line with the appropriate wires leading to the left turn/brake and right turn/brake lights. The red wire exiting the converter would then be used to power your third brake light. The yellow and green wires on the output side of the converter would not be needed...
    view full answer...
  • How to Wire a Towed Vehicle With Seperate Turn and Brake Cicuits on Towing Vehicle
    If the vehicle you are towing with has separate stop and turn signals then it will need to be wired with a Modulite converter so that it can run the lights on the vehicle you are towing that does not have separate turn signals and stop lights. If the vehicle you are towing with is already setup to tow a trailer then the Modulite converter is most likely already installed. If you are towing with the 1994 Ford Ranger mentioned above then you will need to wire it with a 4-way connector...
    view full answer...
  • How To Wire A Towed Vehicle When Both Vehicles Have Separate Stop And Turn Signals
    The Tow Ready Vehicle To Vehicle Taillight Converter, # 118158, you have referenced will not be needed since you will be staying with a 3-wire system (separate stop and tail lights)on both of your vehicles. The converter is only needed if you had a 2-wire system (combined stop and tail lights) on the towing vehicle and a 3-wire system on the vehicle being towed. I would recommend using a diode system to wire your vehicle because the diodes will prevent feedback from going from the taillights...
    view full answer...
  • Does the Vehicle to Vehicle Tail Light Converter Work with LED Lights
    Vehicle to vehicle converter # 118158 works if the TOW vehicle has regular lights and the dinghy (vehicle being towed) has LED lights. So basically the input source has to be 12 volt incandescent lights. I have linked a demo video for you.
    view full answer...
  • How to Add Dedicated Turn Signals to a Trailer with Combined Function Taillights
    I know what you are trying to do, and it is possible with the part # 118158. To add a separate turn signal on your trailer you would use the # 118158 to just tap into the trailer turn signal/brake light circuits but you would not interrupt the circuit that runs back to the taillight assemblies. This way the output side of the converter box will have the separate taillight signal for you to run to the additional turn signal and the rear taillights will still be combined. I attached...
    view full answer...
    Image 1 for
  • Installing Side Trailer Lights to Blink with Corresponding Turn Signal
    If you are wanting to install side marker lights on your motorcycle trailer that blink with the turn signal, it will need to be tapped into the turn signal/brake light wire for that side. However, just doing this will also allow the side light to come on with the brake lights. You do not want to attach it to the running light circuit, as this would back feed and force the lights to come on when they should not. Trailer have combined turn signals and brake lights and the running light...
    view full answer...
    Image 1 for
  • Can 2-Wire to 3-Wire Tail Light Converter be Used on a Vehicle Just to Separate Signals
    You can use a 2-wire to 3-wire tail ilght converter to separte the brake and turn signals on your 2017 Jetta. I recommend using the Curt, part # C56196, because the Tow Ready, part # 118158, is not compatible with LED lights. Basically, you connect your combined right brake and turn signal wire to the green wire on the conveter's input side, and your left brake and turn signal to the yellow wire on the converter's input side. Then ground the white wire to the Jetta's frame. On...
    view full answer...
  • Which Converter Module is Recommended When Adding a 3rd Brake Light to the Rear of the Trailer
    What you actually need is the Tow-Ready vehicle to vehicle taillight converter # 118158. It will convert your two wire system on your towing vehicle up to a three wire system to your towed vehicle. On the input side of the converter # 118158 going to your RV you will match each function to the appropriate function of your trailer. To make sure you have found the correct wires for each function, use a circuit tester like # 40376 to test the wires. The output side gets connected to the...
    view full answer...
  • How to Wire Up Snowmobile Trailer so that it Has Separate Turn Signals from Stoplights
    I am assuming the lights ground through their mounting hardware and the two wires ran to each are for the two illuminations. One brighter and one dimmer. If you wanted to run just the running light circuit and turn signal to just one of the lights you can do this but you have to install a signal converter so that you can get the turn signals by themselves. For that you need the part # 118158 wired to your trailer's taillight wiring circuit. I attached a picture that shows how this...
    view full answer...
    Image 1 for
  • 7-Way to 5-Way Adapter for a Honda Pilot with 7-Way and Trailer with 5 Pin Connector
    A 5-pin round connector is pretty rare, are you sure you do not have a 6-pin, 5 pins in a circle with one pin in the center? Having both trailers work with your 7-way connector on the Pilot will be pretty easy. You will need a 4 pole to 7-way adapter, part # PK12716. This will allow you to tow the trailer with the 4 pole connector with no problem. For your trailer with the 5 pin round connector, you will have to make a wiring modification to the trailer because of the separate brake...
    view full answer...
  • 3 Wire to 2 Wire Converter to Combine Separate Brake Light and Turn Signal Circuits
    Vehicle to Vehicle Tail Light Converter # 118158 and the Curt version, # C56196, both take combined brake light and turn signal circuits and separate them out. You are looking for the opposite which is basically what any trailer wiring harness with a converter for a vehicle will do. If this is for a flat tow set up or an application other than towing a trailer you could use Brite-Lite converter # RM-732. If it is going on a vehicle to tow a trailer then I would need to know the year,...
    view full answer...
  • Trailer Wiring Converter Recommendation for Adding Third Brake Light to Trailer
    You have to use a taillight converter like the part # 118158 wired to your trailer's wiring so that you can seperate out the stop light from the turn signals. Once you do that the red wire of the box will have just the brake signal for you power the third brake light. It will not blink with the turn signals.
    view full answer...
  • Vehicle-to-Vehicle Tail Light Converter for Use with LED Lights
    The Tow Ready Vehicle to Vehicle Tail Light Converter # 118158 cannot be used with a motorhome or towed car that has LED lights since it is intended to receive and to output the higher power from standard incandescent light wiring. LEDs are very efficient and operate on much less power so their wiring is also lighter. The lower-power signals will not always allow normal operation. Some combinations of MH and vehicle may work if you install load resistors like # P230004A-2 but the better...
    view full answer...
  • Converter Needed to Prevent Trailer Hitch 3rd Brake Light From Flashing when using Turn Signals
    In order to prevent the trailer hitch third brake light on your 2000 Chevrolet Blazer from flashing when using the turn signals, you will need to install the Vehicle to Vehicle Taillight Converter, # 118158. This converter will work with the LED trailer hitch brake light. LED lights are only a concern if they are on the vehicle and the converter draws power from them. The Vehicle to Vehicle Taillight Converter, # 118158, separates the signals so the third brake light will only illuminate...
    view full answer...
  • 2-wire to 3-wire Converter for Trailer Lights
    The Tow Ready Converter # 118158 will work well for your application. This converter needs to be installed downstream, so to speak, of your trailer connector. This converter box is not designed to be exposed to the elements, so you will want to mount it somewhere on the trailer where it is protected. You could also use a fuse box, like # PK52248, to protect the converter. If the ground wire from your trailer connector is already grounded to the trailer, the converter's ground wire can...
    view full answer...
  • Can I Add a Separate Turn Signal Light to My Trailer
    Yes it is possible to add a separate amber directional light to the trailer using part # 118158. Most trailers use a 2-wire system. One wire for the running lights on the trailer and the other wire is for the brake/turn signals. You can use the taillight converter to convert the 2-wire system to a 3-wire system by separating the wire for the brake/turn signals to add a seperate amber turn signal light. You want to splice the tail light circuits on the trailer with the green and yellow...
    view full answer...
    Image 1 for

Do you have a question about this Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Rachael H
Expert Research:
Rachael H
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Jacob T
Video Edited:
Jacob T
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
Isabelle B
Employee Cole B
Installed by:
Cole B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.