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Roadmaster/
Diode Kit/
Splices into Vehicle Wiring/
Universal/
Tail Light MountItem # RM-15267
Retail:$151.43
Our Price: $123.95
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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.
Installation Details 
2010 - 2019 Ram 1500
2019 - 2019 Ram 1500 Classic
2011 - 2011 Mazda 2
2012 - 2014 Chrysler 200
1995 - 1997 Nissan 200SX
1989 - 1989 Nissan 240SX
2010 - 2019 Ram 2500
1980 - 1983 Datsun 280ZX
2004 - 2013 Mazda 3
1993 - 2003 BMW 3 Series
1991 - 1996 Mitsubishi 3000GT
2007 - 2007 Chrysler 300C
1999 - 2004 Chrysler 300M
1984 - 1984 Datsun 300ZX
1990 - 1994 Mazda 323
2010 - 2019 Ram 3500
2013 - 2018 Nissan 370z
1984 - 2019 Toyota 4Runner
2006 - 2012 Mazda 5
2012 - 2019 Fiat 500
2014 - 2016 Fiat 500L
2006 - 2008 Mazda 6
1983 - 1989 Dodge 600
1986 - 1997 Mazda 626
1993 - 1994 Oldsmobile 88
2007 - 2019 GMC Acadia
2017 - 2017 GMC Acadia Limited
1995 - 2019 Hyundai Accent
1990 - 1995 Plymouth Acclaim
1981 - 2019 Honda Accord
See All Vehicle FitsVideo of Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to take a look at the RoadMaster diode seven-wire to six-wire flexo coil wiring kit. Now, this will let your wire your vehicle to accept your RV's tail, brake and turn signal lights for flat towing. This will wire the tow car as a combined system so that your brake and turn signals will travel along the same wire. It will also prevent electrical feedback in the damage it can cause to your vehicle's electrical components. The diodes right here use a powder-coated aluminum case, which is corrosion resistant. They provide protection from the elements. Now, if this kit is used with supplemental braking system, it may require a brake light relay, part number RM-88400.
We do sell that separately on our website. The flexo coil cord right here is resistant to water, oil, chemicals, has silicone-injected plugs to help prevent corrosion. The center pin on the six-way plug, it can be wired two different ways. This one happens to be wired as a 12-volt power center pin. It includes everything shown here on the table. Includes the four high-power diodes, the 30-foot long, four-wire harness, all the wire connectors you'll need and cable ties, a nice three-foot long plastic loom to put around the wiring.
This cord right here is an eight-foot coiled cord, and it comes with a vehicle socket, the six-pin socket right here and the mounting bracket for that. All these parts are made in the USA and also covered with a nice set of detailed instructions on how to install everything. A few specs on this kit: The diode max. amperage is 85 amps. The diode max. voltage is 24 volts, and we mentioned the coil cord length is eight-foot, and when it's totally extended out, it's 15 foot.
One last note on this kit. For applications that'll have separate lighting, this kit will cause your brake lights to function as both brake and turn signal lights, so you would need to get a wiring converter, which is part number 118158, and two additional diodes, which are part number RM792. Those will be needed if you want to retain separate turn and brake signals. That should do it for the review on the RoadMaster diode seven-wire to six-wire flexo coil wiring kit.
Average Customer Rating: 4.8 out of 5 stars (144 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.All was straight forward and the video was spot on for the installation. Wasn’t easy but well worth it. Had a broken part on the original delivery and the part was delivered fast. 654435
Great customer service 683031
Overall this would be a five star review except for two issues. One being the wire provided was not 30 ft but was closer to 25 ft as I checked before using. I wired the same as the great etrailer video for my vehicle Cadillac SRX and ended up short. Fortunately I had additional wire and was able to complete the run. Secondly, the female spade connectors used on the diodes needed to be tightened as they were not very tight as provided by Roadmaster. These were all Roadmaster issues and of not fault of etrailer. Everything else looked of good quality. 428886
The quality is good, straightforward install. I’m happy with the kit 568004
I found the installation video to be more helpful than the written instructions. The toughest part of the installation was routing the wires to the front of the Forester. The video was helpful in figuring out the best path for the wires. 460332
I like the coiled cable in RM-15267 At one time I owned an Airstream travel trailer that had a tow cable. The Airstream did not have a coiled cable and I had to tie it up with bungy cords to still allow flexibility while traveling. That lasted for one season and the bungy cords stretched out and the cable started touching the road, scraping off the insulation! The coiled cable in the RM-15267 prevents the cable from dragging on the road! 446459
Everything installed without any issues. I'm very particular so it took 2 days to complete everything. I'm sure a pro could do it much faster. Have towed the 4" lifted (and loaded) Jeep accross the Rockies about 6 times and everything is working perfectly!! Very happy camper!! 301003
The product is a good quality I installed this before. This time I needed 4-5 feet extra wire to route it properly. That's why I give it a 4 start. On the end its worked fine. 252634
The wiring kit included all the parts listed and the video was most helpful with the installation. The installation went fairly easy until I got to the portion of running the brown wire from one taillight to the other taillight. The brown wire was not long enough. I had to splice another piece of wire on to the brown wire to make it longer. etrailer should consider making the length of included wire approximately 3 feet longer. That would have helped a lot with the installation. Also include a longer piece of the split protective plastic. Other than those two issues, I am satisfied with the product. 459131
After one year of use and the wiring installation has worked great.
Steve - 12/11/2018Towbar 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. 444983
Great kit for auto to motor home connection. Watched the video while installing the kit. Very good video and spot on for making the connection and explaining how to route the harness. 502226
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. 616795
Great service. Outstanding delivery time. Very helpful customer service. 575415
Great package. Took my time and followed the videos about 2 1/2 hours. Finished product worked great. 501364
Good product and quick shipping. What was best of all was the on-line video that showed how it install. Made the installation much easier. etrailer has good prices and excellent customer service. 466905
I’ve been a great full user of etrailer, been using them for all my hitch and all wiring needs since 05. They have been a great company to work with with great customer assistance and knowledgeable technicians. Thanks for all your help over the years. 565168
Excellent company. Great communication, fast shipping and the products worked perfectly. I had some trouble installing this to my rear brakes, but that was my own fault. I didn't realize that the brake lights are grounded when they are mounted to the Jeep. So I kept testing the lights once they were hooked up, however they weren't mounted back on the Jeep. It wasn't until everything was mounted back on that it all worked without any issues. 305606
My son and I really appreciate everyone at etrailer.com! When I emailed you awhile ago, Jameson C. answered with everything we would need to hook up my RAV4 to our motorhome. Our order came today and my son has already installed the hitch to the RAV4. Now to install everything on the motorhome! He has watched your videos and read your instructions and the installation wasn't that difficult. Thank you for all your help! 414621
I ordered an entire setup to flat tow my Subaru with my RV. Having never done this before I was nervous about missing something I might need. etrailer made it very easy when I called them on the phone. I told them what I was trying to do and they made sure I had everything needed to complete the job. I was given a name and phone number to call the same person if I had any issues. When one of the boxes was opened it was missing two pins from the manufacturer. A quick phone call and they had them in the mail in a matter of hours. This kind of personalized service is missing in our ever changing world. It was a pleasant surprise to find it here. Great Job etrailer. I will favorably recommend to everyone. 493275
This product is incomplete. 4 feet more wire and five wires instead of 4 wires. The 4 wires are at least 4 feet short requiring you to purchase more from a local hardware store. This kit also does not combine the brake and turn signal requiring an additional wire. DO NOT be fooled by this kit. If you have a supplemental brake They want you to buy another kit that is impossible to install on the brake switch under the dash. I just added two relays at each taillight to keep the motorhome brake power from mixing with the Explorer power. Very simple and everything is easy to access. 519554
Very good product. Was fairly easy to install if you are a little mechanically inclined. Take your time and think it thru and it is not that hard to install. The wire was the perfect length. 574014
Lights work great 7 to 6 plug work perfect I have a charging wire 690558
Friendly service, Great prices, fast shipping! What else could a person hope for! 690216
This transaction went smoothly, This is for an replacement item that was lost in Harvey flood. Worked great on my H3 Hummer for braking. Plan on buying another hummer for TOAD. Had fast delivery. Have done business with etrailer in the past. Haley was very helpful and pleasant to deal with. Thank You 683181
This product worked flawlessly on my 2013 seirra 4 wheel drive. Shipping and customer support was lightning fast. Cudos to etrailer. 682353
as usual you guys pull through. great deaaling with you will certainly be back 680743
I bought and installed base plate and wiring on a 2018 Ford C-Max hybrid car. The wiring was a little complicated due to the hybrid setup on the car, however, everything worked out well. I have done this on several other cars I have towed behind my motorhomes. All products and help from etrailer.com was excellent. The video presentation was very helpful. 681636
Everything is here as promised. Now all I have to do is install it all. 679819
Pricey but works as it should. 679658
Worked as described. Had no issues would recommend without reservation. 677390
Great product and very fast service. 674119
Works great 671390
his product worked as advertised. Installed it on my 2010 Jeep Wrangler. shipped fast and the install wasn't all hard with the help of the great videos on line made it much easier. 670790
One year later and it’s still working great. The plastic area around the male prongs that go under your bumper is kinda weak and broke where you mount it but it’s really not affecting anything. Over all I’m happy and would buy it again if I needed to. 670502
Used the installation video and works fine. The spool of wire could have been another foot longer though. 669728
Called and spoke to a representative and got everything I needed to set up my GMC Acadia for dingy towing. Great knowledgeable staff. I always can count on them. 665626
Takes time to install, but easy with good instructions. Fast shipping from etrailer. Thanks! 661431
I am very impressed with service and product . I will use this company again for my future needs. 661412
I use etrailer because they always have what I want and good instructions on how to use it. 660815
All items were delivered quickly and were packaged so that nothing was damaged in shipping. The proof is in the installation so when that is completed I will let you know how it worked out. 659853
Very good service. William B was very helpful in getting me what I needed to hook up my GMC Terrain to my motorhome. Now, I have to install it all. Hopefully the installation instructions that William sent are as good as the rest of my ecperience with etrailer. 659341
Works great. Glad I went with the flat tow route rather than dolly. etrailer install videos made selection and installation as easy as possible. Will definitively use etrailer when setting up next tow vehicle. 658101
Sending a photo of our Jeep behind our Winnebago View with our Roadmaster Falcon tow bar. Great service and advice. 657072
Nice to get this all in a kit for you initial set up on a toad. Good quality plug cord. I added 2 diodes so I could do my turn signals separate from the brake lights and my toad (CR-V) tail lights all work as if the car was on its own. 655644
Looks like what I need. 653210
Simple instruction & instulation! Great service and quick delivery ! 650043
Everything is fine. 646422
A++ Thanks 646402
I have not yet installed the wiring kit I received but I received the item only 2 days after ordering. 644966
Everything needed to add tail light, turn signal and brake light's to your towed vehicle is included in this kit. The bracket for the 6pin connector is also included which is great. My main recommendation is that before splicing wires is to make sure your RV or towing vehicle wiring is as described in the documentation. I made my own table of 7pin wiring from the RV to the 6pin connector which is part of this kit. While all the documentation and was correct in an installation a few years back I wasn't as lucky and spent later many hours troubleshooting my connections only to find out that the RV was not wired the way the documentation stated. Again, do yourself good and check the RV wiring with a buddy so you know how it is connected. One other thing. Make sure the 27ft 4 wire cable is long enough for your application. With our truck it was on the short side and I had to splice some of the unused white wire. Lastly, and this is not part of this kit, but the provided 6pin connector has the provision for it, is if your RV has the 12V line and you intend to use this line to charge your towed vehicle, then make sure your umbilical cord carries that wire to your 6pin connector on your towed vehicle. Utilize that pin to bring 12V to your battery with an adequate breaker in place (I used 15A) with a diode to prevent the current going to the RV. 643832
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