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This wiring kit carries your RV's brake and turn signals to your towed car's tail lights. Diodes prevent damage from electrical feedback. Connects RV and towed car with 4-pole flat plugs. Includes installation hardware.
Features:
Specs:
Notes:
"Don't be intimidated by diodes: if you can strip and crimp wire, this installation will be no problem."
A combined lighting system, or 2-wire system, uses the same light bulb to signal both braking and turning. (In other words, the car signals a turn by flashing the brake light.)
A separate lighting system, or 3-wire system, has the brake signal and the turn signal light up independently of each other. Typically, the turn signal is amber.
To keep the separate lighting system on your car functioning properly while you're flat towing, add a wiring converter (118158 - sold separately) and 2 additional diodes.
If the engine is off and your car's brake lights illuminate when you press the brake pedal, you need to install a brake light relay (RM-88400 - sold separately) with this kit. Without a relay, your car's brake signal will override the turn signal sent by the RV when you are slowing down to make a turn, creating a potentially dangerous situation. Other drivers will see that you're slowing down, but not that you're making a turn. With a brake light relay, you can signal both and travel safely.
Customer Satisfaction Score:
92% were satisfied with this product
8% of customers were not satisfied
Ratings & Reviews
I ordered one for 2025jeep wrangler. I was sent a universal one. That requires cutting wires. I returned it.
Works perfectly and straightforward instructions made it easy to install.
This is the third time I have order base plates and electrical hook ups from etrailer and love this company. We have a 1979 MCI Bus conversion and it is difficult at time finding things for towing etc for it because of age. Not with etrailer, they have it all. We have towed a 96 S-19 chevy, a 98 Jeep was next and this year we got a 2001 Jeep Cherokee which we got the electrical kit for from etrailer.com and the base plates are still on the way. Everything fits nicely and if you are unsure of how it all goes together just watch their video''s on the etrailer website which are very informational.
Thank You etrailer.com for being there when we need you. See you all down the road....
David
10/28/2022
Still working very well and didnt even have to pull the bumper off to install it. very strong units. the electrical hookups worked well also and easy to hookup as well. Lights all work well. The brake cable system I had on my previous Jeep I mover to the cherokee but was a real pain to find a good pass through because of all the mechanicals in the Jeep cherokee but good it through finally.
The universe kit worked great!
Working well easy to install
We have used the Roadmaster Wiring Kit for 9000+ miles with our 05 Jeep LJ and have had no problems...
Instalation was not very Difficult...
worked very well
It worked as advertised.
Hi. Bill. The products are great but you can pretty much get them anywhere. Your company's claim to fame for me is the videos. Right on target even for an old mechanic like me. Keep up the good work and thanks!
Product is very well built and is hidden within the bumper/grille. Installation wasn't too difficult, reinstallation of front bumper requires 2 people.
Pleased with end results.
thank you.
Worked perfectly!
Work flawless I installed it on a 2021 Yukon XL and pull it behind a class a motorhome
Worked perfectly. Connected the combined motorhome signal and brake lights to my Nissan separated system.
The delivery was spot on and the product was as described
Installation instructions were great, no issues or questions. I ran the wire thru the frame, and used split wire loom and tape to protect wiring when outside the tube frame.
Works as advertised and the install video really helped ease the easy DYI install.
Needs some additional RED connectors for the awg-22 wire Toyota uses in their rear lighting system. The Blue Connectors work, but it is too easy for inexperienced DIY users to "over-insert" the factory awg 22 smaller wires and crimp the insulation and miss the stripped copper portion if the wires.
Never received order. Very disappointed at no response to my email inquiry.
My 6 pin plug for my Jeep arrived at our campground when expected. It was easy to install. The connection with my cord was tight and it solved the wiring issues I was having on my Jeep. Thanks to the Roadmaster technician Tim who helped me troubleshoot my problems and recommended installing a new plug before changing any wiring. It was the right solution!
The package was complete and using YouTube videos was simple to install.
Customer support and tech support were friendly and very helpful.
Radial tires are the only way to go on a small trailer bias tires I went through in 1k miles. Radials over 6k and still going
Easy to install with the great installation instructions
This item was installed as my complete kit to enable flat towing of my Buick Encore GX. All the components work together for a wonderful towing experience.
Connecting and disconnecting is very easy. It makes flat towing a breeze.
We have put about 8K miles on the system so far and its going strong!
Do you have a question about this Flat Tow Wiring Harnes?
Info for this part was:
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Chuck B.
5/7/2025
No problems so far.