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Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit

Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit

Item # RM-146-7
Our Price: $83.29
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Shipping Weight: 3 lbs
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Easily and effectively connect your motor home to your towed vehicle with this water, oil, and chemical-resistant electrical cord. Flexo-Coil technology allows cord to extend more than 8' and then contract conveniently for storage. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-146-7 or order online at Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit. Accessories and Parts reviews from real customers.
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  • Reviews (202)
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Roadmaster Accessories and Parts - RM-146-7

  • Tow Bar Wiring
  • Adapters
  • 7 Round - Blade to 6 Round
  • Roadmaster
  • Coiled Cord

Easily and effectively connect your motor home to your towed vehicle with this water, oil, and chemical-resistant electrical cord. Flexo-Coil technology allows cord to extend more than 8' and then contract conveniently for storage.


  • Adapter cord can be used for multiple towing applications
    • Perfect for running power from your RV with the 7-pole, round plug to your towed vehicle or trailer with a 6-pole, round plug
  • Flexo-Coil cord can expand more than 8' yet still contract to prevent dragging and tangling
  • Silicone-injected plugs prevent corrosion
  • Electrical cord is resistant to water, oil, and chemicals
  • Center pin on 6-Way plug wired to 12V power for RM-146-7, there are two industry standards
  • Assembled in the USA

Notes: Flexo-Coil cords are not intended for use with Roadmaster All Terrain tow bars or any other tow bar that includes cable channel guides. Only straight cords should be used with those models.

146-7 RoadMaster 7-Wire to 6-Wire Flexo-Coil Kit

Video of Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Roadmaster Flexo-Coil Kit Installation - 2016 Jeep Wrangler Unlimited

Today on our 2016 Jeep Wrangler Unlimited, we're going to take a look at, and show you how to install, the Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit, part number RM-146-7. We're going to be using a 6-pole round that's going to offer a 6-pole plug, and then that flex coil is going to go to a 7-pole, which is going to plug in to the back of most RVs for us there. Pull the boot off and we want to slide it down our wire to start. Just tuck that back here for now. Figure out how much wire we're going to need and cut that off. I'm going to strip the ends of these back. Now, I'm going to pull that ground wire off the back of that 4-pole plug, I need to have a ground however, for the lighting system here.

Now, I'm going to twist the two grounds that I'm going to be using together. We'll start by making that connection behind our 6-pole. Top of the plug here, looking at the back, our ground is going to be this one in the top left corner there. Use a little Phillips screwdriver, or a little flat blade, thread it, and then it's just a matter of tightening the screw back down. If we come down one, that's going to be our left turn, one more is going to be our right turn. The one up here is going to be our trailer marker.

The yellow, that's going to be our left turn. Green is going to be our right turn, brown is our trailer marker lights or our running lights. At this point, I like to use a little bit of tape and just wrap this all up, and I'll do it all the way back to where it goes in to the vehicle itself, just to keep it a little bit more protected and also looking nice. That'll slide over, and then what we have are the two self-tapping screws that came with our face plate. If you face plate doesn't have the mounting tabs, here, to secure your items to, you can also use part number 18140, it's just a tow-ready short bracket. We'll go underneath there and get our ground connected, and we'll be ready to test it out.

Figure out where we want it. I'm going to start my hole first with my self-tapping screw. Once you've got your hole started, lay your ring terminal over the top of it and get it secured down. We'll start by testing out the signal that will act as our turn signal, and our brake signal. We've got our running lights there. Look at that, right turn signal, got left turn signal.

Check the brakes, all right, perfect. Now with everything working properly, that completes our installation of the Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit, part number RM-146-7, on our 2016 Jeep Wrangler Unlimited.

Customer Satisfaction Score:

Customer Reviews

Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit - RM-146-7

Average Customer Rating:  4.9 out of 5 stars   (202 Customer Reviews)

Easily and effectively connect your motor home to your towed vehicle with this water, oil, and chemical-resistant electrical cord. Flexo-Coil technology allows cord to extend more than 8' and then contract conveniently for storage.


Vehicle; 2019 Chevy Equinox 2.0 liter Turbo AWD
I purchased the following parts from etrailer and installed them myself as per the instructions provided with the parts. The Roadmaster parts provided by etrailer are the best quality and there service is second to none.
Parts purchased;
RM-156-25 & RM-156-75 Battery charge kit.
RM-523193-3 EZ4 Base kit.
RM-751489 Stop light switch kit.
RM-98160 Brake master air brake kit.
RM-146-7 Power cord
Thank you etrailer for your great service & product support.

Rob K.


Since I installed these parts we have towed the Equinox about 20000 miles and havent had any problems with any of the products. They work exceptionally well. Very Happy


eTrailer was very helpful in choosing the correct hitch for our rv and car. They also provided a special brake application in the car that makes it super easy for toad braking.
I am 72, and I hook up this toad and pull it with confidence. The instructions to hook up the toad was presented with ease. They knew exactly what they were doing, and we didn't rush through the demonstration. I would recommend eTrailer to anyone.


Wired up the 6 wire receptacle in place of the flat 4 plug and mounted to the base plate. Looks great. Checked that wires from MH match this for proper operation.

J J.


Has worked flawlessly. Very pleased!


Works great, easy to install!



Great, No Problems


Had a safety pin come out [of the truck receiver] and cable broke, my mistake. not strong enough otherwise very pleased



Just fine. Breakaway cables should be stronger. bought different vehicle to tow and a new road master kit It took 2 mechanics 3 days to install 2022 Jeep. $xxxx. GRRRRR


Product Review:
This is my second set
of this kit. Setting up another TOAD. Very easy to install. Nice screw terminals with big enough holes for appropriate cable gauges. Everything you need is included. Even nuts/bolts.
Yes, I could have just ordered the receptacle for my second TOAD, but having a second cable as a spare is not such a bad idea ;)

Site Review: E-trailer is super easy to navigate. Easy to check out via CC or paypal...and you get follow up emails. No chasing after tracking numbers or order status' ... All diagrams and product data is available. If it isn't they'll get it for you ASAP. Top notch service IMO.


Efficient and exactly what I needed! Th anks!


Well made product. Have ordered a number of products and have never been disappointed. The service is excellent, all those I spoke with were knowledgeable and helpful. I would recommend anyone needing a setup to tow a vehicle behind an rv go to etrailer, outstanding company!


Sturdy connector to give us the extra flexibility and length


just what I needed


High quality. Received fast.


The 7 to 6 coiled cable from came the next day and is exactly as described. After having ordered the same item from another professional online hitch-seller in Texas, paying for the item, and waiting 3 weeks without even a thank you for your order or status of the order, I finally had to call and leave a voicemail, then call back the next day to find out the order might ship on Friday. Needless to say I cancelled the order and called and spoke to Jan at who handled my order and verified each item was in stock and would ship the next day. Boy was I surprised when the driver delivered my package at noon the next day. A real Professional company. Buy with confidence.

Ed R.


Perfectly. I always know the the electrical connection between the Motorhome and the towed vehicle will function as designed whenever I hook the two together.


Work well.... as described


Great products and service


This is a must have to connect your "toad" to your motorhome. It works very nicely with the Blue Ox Tow Bar Wiring Kit with 4 Diodes.

Highly recommened.

Dale H.


Its working out great


You get what you pay for, I paid for quality and that's what I got. This plug has not failed me yet, it was exactly the plug I needed to operate the towed vehicle brakes and additional line for battery charge while towing. Great product and I must say all the videos on etrailer are top notch quality and very helpful.

by: is a great place to shop. I experienced fast shipments and received orders were accurate. These products were just some of the products that I purchased for towing a 2014 Jeep Compass. I also purchased a Blue Ox Aventa LX tow bar and baseplate!


Purchased 7 wire to 6 wire coil kit and drop down receiver adapter. Had them sent to me while I was away on a trip. Timing was perfect.
Not my first purchase from e-trailer and definitely won't be my last.


Good quality and works very well.


Works great! Can't beat etrailer fast delivery. Had to change receiver female socket on RV to position above hitch bar as kept bending on driveway. Nothing to do with this product though.


If you're pulling a toad vehicle this cable has the 12v power going to the proper pin for charging your toad battery (some don't). It is well constructed and should last for years. I added a little silicon sealer to the ends where the cable meets the connector to assure water won't get in.


The coiled cord is a much better product than the straight cable supplied with my tow bar assembly. This allows for a straight run from the RV to the towed vehicle. The original had to be routed through channels and when being moved could easily pull the wires out of the connection.


The wire connector looks good so far (just got it). This is a replacement for another connector that I broke. I'm buying Roadmaster because I have had such good quality and service from them on other parts. I'm sticking with Roadmaster.


Received the product in a timely manor and installed it. Every time I hooked the toad all the lights worked the proper way. I only towed with the Motorhome on several trips and I am looking forward to another traveling season.


I replaced the 4 pin connector with this 6 pin connector so I could hook up a battery tender for my toad. It arrived when promised and was easy to install after a quick chat with the tech support team at e-trailer. Based on reviews I've read, I should be in good shape for my trip from NH go FL this winter

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