To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
Diode kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. Wires 2-wire and 3-wire systems to operate as a combined lighting systems. Includes 7-wire to 6-wire Flexo-Coil electrical cord.
Features:
Specs:
Note: For applications that have separate lighting, this kit will cause your brake lights to function as both brake and turn signal lights. A wiring converter (118158 - sold separately) and 2 additional diodes (RM-792) will be needed if you want to retain separate turn and brake signals.
Separate vs. Combined Lighting Systems
Some automobiles operate on a 3-wire system, wherein the brake signal and the turn signals travel along different wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) This is referred to as a "separate lighting system". When you hook up for flat towing using this kit, your towed car's lighting system will operate in a combined fashion regardless of whether it typically has combined or separate lighting. This means that the brake and turn signals sent by your RV to your towed car will be carried on a single wire. As a result, your car's brake lights will do the flashing for the turn signals. Your vehicle will still function as designed when not hooked up to your RV.
Do You Need a Brake Light Relay?
Because this kit wires your vehicle as a combined system, a brake light relay (RM-88400 - sold separately) may be required if you use a supplemental braking system with your towing setup. A supplemental braking system depresses the brake pedal in your towed car every time you apply the brakes in your RV. So, if your towed car's brake lights illuminate when the brake pedal is pressed and the engine is off - as is the case when towing - then you need to install a relay to ensure that the lights on your towed car always act in accordance with the signals sent by your RV via the wiring harness. Without a relay, the brake signal from your towed car will override the turn signal sent by your RV when you slow down to make turns, creating a potential hazard.
Average Customer Rating: 4.8 out of 5 stars (444 Customer Reviews)
Diode kit allows you to use your vehicle's tail lights and wiring system while preventing feedback from your RV. Wires 2-wire and 3-wire systems to operate as a combined lighting systems. Includes 7-wire to 6-wire Flexo-Coil electrical cord.Received my kit and everything I needed was in the box. I did all things according to the excellent video that I watched numerous times. It paid off, because installation was a breeze. It took me about 21/2 hours from start to finish, 1/12 hours to run the wire through various places in order to keep it away from any moving parts beneath the under carriage and partially through the frame. Hooked up the passenger rear taillight first. Brown wire running from passenger side was a little short so I took an old piece of spare wire and spliced it into the brown wire. I used a shrink wrap making sure I had a good solid connection.it was very easy and something I thought I could never accomplish, but it turned out very well. The man in the video and how he walked you through the whole process, I felt it was doable. Thanks to good instructors and step by step videos, this install was very easy. Thanks etrailer for another good lesson and product. Thanks-John
John - 06/19/2021
We have towed our Jeep almost 2,000 miles since installing the recommended parts from etrailer and it has worked perfectly on every connect and disconnect along the way. Tows beautifully, even at 70 mph. Excellent customer service and helpful videos from these folks. Would recommend to anyone needing help with parts and guidance in towing their toad to give them a call.
Brent T - 04/05/2020I ordered this kit to get me a heavy duty coiled cable with room to use one input as a dedicated power supply from the bus to then be sent to the towed battery to keep it charged going down the road. the diodes i chose not to use, as i have a hopkins plug and play kit on the way, that will marry up the 6 pin fitting I just needed the cable with the 7 to 6 adapters, it was the best price for the need :)
robert S - 02/22/2020I want to thank everybody from etrailer.com very good communications. The D ring bumper mount and the roadmaster diode 7 wire to 6 wire wiring harness they said it would take 4 to 6 weeks for it to come in and It only took two weeks.
This wiring kit worked great on my 2013 Honda CR-V. The kit was fairly easy to install. It is helpful to have some electrical wiring experience.
John S - 07/14/2021Excellent product. Fast delivery as usual. Everyone at etrailer has been phenomenal in helping me get a Toyota Rav4 ready, as well as my class-c tow vehicle, for 4-down towing on a 6K trip this summer (June 2021). Includes this wiring kit, brake systems and host of other products. Involved process but done now and ready to go. My personal thanks to Michelle, Carol, Tammie, Geoffrey, George and others.
Had this installed on my 2020 Buick Envision for a year now. I towed it all over the western US last summer and am hitting the east this summer. This works perfectly and makes hookup and towing so much easier. Install was a breeze since I did it while I had the front end apart for the base plate install.
I ran out of time to install this myself, so I had it done by a trusted Auto repair shop. While they had not done this specific kit before, they did comment that it was more complex than they had expected. They also installed the base plate and breakaway switch for the supplemental break and took about 10 hours in a fully equipped auto shop. The estimate the next one will take about 5 hours and only charged for that. This leads to a couple of points. 1. If you choose to do this in your typical home garage, plan on a day or two. 2. Once installed properly, it is a really slick system.
Kim - 10/03/2020The Roadmaster wiring system for my Ford Fiesta work great. No problems I am very satisfied with. However I did use it with the Blue Ox baseplate because it had a good fit for the Fiesta chassis.
Installed by my Mechanic in my 2018 Ford flex. We have gone LA to Tacoma and LA to Tampa St Pete. A lot of highway travel but also enjoying the back roads in our 28' Leprechaun.The system has performed flawlessly. Will highly recommend.
Easy to follow instructions! Installed on a 2011 Mini Cooper S hatchback. Hardest part was figuring out what wires went to what bulb on the Mini. Once I got that squared away, install was a snap! I did mount the 6 round plug socket to the Mini's front license plate bracket. Not a great spot. May switch location or go with a 7 round to flat 5 coiled wire.
My first complete install for Motor-home to flat tow vehicle lighting, follow the instructions included it was a snap. kit provided was of good quality materials, color coded to American standards.
I have a problem with this part. Towing at night time the head light mode seems to back fees into the Colorado truck and set off ABS check engine light. Also activates the windshield wipers after towing for a while.
Tyler M - 03/26/2021This wiring kit was very easy to install. My daughters and I had our new jeep wired and ready to tow in a couple of hours. Great learning experience for my girls. And after a year we haven't had any problems with it. Great product!
Running this wiring on my Wrangler 4 door is a bit of work, aside from that the wire/plug setup has gone 20 thousand miles now and no issues, works well. I am also running the trickle charger through this connector/cable a separate item just wanted to mention it is easy enough to use with this. On a side note, on my RV i had to fix the plug wiring, they had it wrong from factory. So if you get funny light behavior after hooking this up, check your vehicle wiring for accuracy, especially on RV's it is all hand done and mistakes happen.
Works as it should wires could be 3’ longer. Had to do a re-route going to rear of vehicle. 2019 Buick Envision. I used this with a Demco Stay in Play Duo. Very happy with etrailer videos and customer support folks. Had to call several times during install of baseplate, braking system and taillight kits. The auxiliary brake switch is a real bear to put in. As in recline seat all the way back lay upside down and try to see the correct bolt. There were a few working words spoken that day. Once installed and setup the systems works flawlessly. The videos are just awesome. Would have gave it 5 stars if I didn’t have to do wire re route. (I used the path in video)
Towbar wiring system arrived within 4 days of placing my order. This 7 to 6 wire system is an upgrade to the simpler 4 wire plugs I've used in the past and will allow me to add on a battery charge line or brake system later on. The demonstration video was indispensable in hooking up the wiring and diodes. Though running and connecting the wiring does take longer than a 10 minute video. Now I can tow my 2016 Jeep Wrangler behind my RV.
Good instructions and very easy to install tnx to Lori AB to getting everything put together for me on order
You’ve got to have this. A simple harness with everything you need to light up your tow vehicle. Enough wire to follow the existing wire run on a 2020 Civic.
Wiring kit and tow brackets showed up on time. Robert was very helpful on the phone. I've also ordered from etrailer many times good company. Install wet very well. Their videos help also sometimes easier than reading directions. Quality of the hardware and base plates and removable arms are well-made.
Works as expected. I hook up and check lights and it works after numerous hook ups
Everything installed as described, good quality and excellent instructions.
Shayne - 06/17/2021I reviewed your installation video and decided to run the wiring through the inside of the vehicle so I needed to extend the wires to make it work properly. I used a flat 4 wire connection set from AutoZone which gave me the additional length I needed.
Even the wire colors were right for the '19 Cherokee T-hawk! The T-hawk is high enough so n inch or two of jacking allows access to run the wire aft, behind coverplates, etc. I cleaned the diode attach points with alcohol to aid adnesion of the tape. Suggest using a quality wire strip/crimp tool. Having no hitch, the rear bumper cover has 4 100mm bolts on the bottom lip. Removal allows pulling it away to run the 'crossing' wires, easily , hidden and secured.
Michael - 04/23/2020Good wiring kit with all you need to insure that towed vehicle rear lights work properly during towing. Medium level wiring skills would be good for a proper install.
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