Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
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Roadmaster/
Tow Bar Wiring/
Extension/
7 Blade to 4 Round/
Coiled CordItem # RM-164-7
Retail:$83.31
Our Price: $64.95
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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.
Features:
Please note: 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.
Video of RoadMaster 7-Wire to 4-Wire Flexo-Coil Kit
Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.
Today we're going to be reviewing part number RM-164-7. This is the RoadMaster 7-wire to 4-wire flexo-coil kit. The adapter cord can be used for multiple towing applications. It's going to be perfect for running power from your RV with the 7-way plug over to your towed vehicle or a trailer, by connecting the 4-wire plug. It's going to come with the mounting sockets. This one right here would be for the 7-way socket. It would mount through there, and it's going to allow you to connect the socket of the flexo-coil cord.
Same thing for the other side. This is going to be the socket that's going to hold your wires on your vehicle. It's going to allow you to connect our 4-wire plug directly in there. That way, you can feed power from your RV over to your towed vehicle. The flexo-coil cord can expand more than 8 feet, yet still contract to prevent dragging and tangling. It's also about making it easier for storage. As you can see here, with it fully coiled or contracted, it's only going to give us an overall length of about 15 inches.
That can be all folded up and moved to a nice stored position; whatever way you want. That's a very advantage to have for you; just a great feature to have when it comes to storage, and to prevent it from dragging once your connections are made. The plugs are going to be silicone-injected. That's designed to help prevent corrosion. The cord is going to be resistant to water, oil, and chemicals, and it's going to feature color-coded, 16-gauge inner 00:01:34 wires. Please keep in mind that the flexo-coil cords are not intended for use with RoadMaster all-terrain tow wires or any other tow wire that includes cable, channel guides. Only straight cords should be used with those models.
In the packaging, it's going to come with a nice little diagram that's going to indicate the socket pin numbers, as well as their function, on both the 7-wire and the 4-wire. That's just great to have. That's going to be found towards the back of the packaging that this system comes in. That's going to do it for our review of part number RM-164-7. This is the RoadMaster 7-wire to 4-wire flexo-coil kit. .
Average Customer Rating: 4.8 out of 5 stars (33 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.by: Vince L.03/12/2015
I recently purchased a Blue Ox tow bar, towed vehicle brake system and three wiring harnesses for towing my Jeep Liberty with our motorhome. etrailer.com was my first choice for the purchase for these items worth almost two thousand dollars. Even though these prices were set by the manufacturer, I knew I could trust these folks. Their salesmen, (in this case Wayne H.), are more than just order-takers. They know what they are selling and are a good source of information on a variety of related products. When Wayne wasn't available for follow-up discussions, the operator took my cell number. Surprisingly, Wayne got back with me right away and supplied me with his direct line in case I had any questions. I've had experience with others dealers who don't get back for hours if at all. Bottom line: etrailer.com will continue to be my first choice for RV and other related items. 178129
by: Irv D.04/29/2017
I needed to order a replacement connector and a Blue Ox tow bar. The website was extremely helpful, but I had some questions and called. Kevin helped be out on the order, getting me just what I needed. I had the items before the weekend, extremely impressive! The tow bar and electric connector are excellent products and a great way to tow my jeep behind our Nexus RV. 374037
by: Lloyd K01/14/2015
Was looking for a 7 pin to 4 pin Flexo Coil Kit. Found it on line at etrailer at ma reduced price I was willing to pay. When I checked with my local RV dealer, He said I needed to buy from e trailer. Their price was below his cost.. 168906
by: Tony P.07/09/2014
Proper product, received in good condition when I was expecting it. etrailer.com performed as they indicated they would. I'll certainly return to shop when necessary. 140413
by: Bob Oxley12/08/2013
This part solved my problem and after simply plugging the cable in, all lights worked perfectly. Thanks for the prompt shipping and delivery, it arrived in time for our holiday travels. 109572
by: Kenneth11/15/2017
I've only used this item for a week so I cant say if it maintains its coil. The only thing I'm not happy about is the 4 prong male / female end. It doesn't lock in good enough in my opinion. I feel with a slight tug or bouncing movement it will dislodge itself and drag on the ground. So what I do is wrap a velcro strap around it to make sure that does not happen. Should one have to do this? You decide. I did like the attach method of the wires inside the female connector. Easy and solid 452082
by: Dennis06/16/2016
I ordered this item to replace a similar harness that had been stolen out of my truck, but was very disappointed to discover that the 7-pin plug would not engage properly with the OEM receptacle on my Dodge truck with factory hitch and tow package! The spring loaded cover on the receptacle would not engage the retaining tang on the plug, and when I finally forced the plug in far enough for it to engage, the left rear turn signal and brake light on the trailer did not work. The plug on the previous harness fit perfectly, so the location of some of the 7 female slots on the Roadmaster plug was evidently not correct. I paid a premium to return it ASAP via UPS expedited shipment over the Memorial Day weekend; I eventually received a warranty replacement 17 days later. At least the 7 pin plug on replacement harness does fit correctly. I will admit that the metal 4 pin plug and receptacle on the trailer end of the Roadmaster harness are much better quality than the cheap plastic parts on the original harness. I would recommend that anyone buying one of these Roadmaster cables first check the fit of the 7 pin plug with your hitch receptacle before bothering to hook up the 4 pin receptacle for the trailer, in case you have to return it! 261794
by: Howard05/26/2018
This product meet my expectations on price and quality. Thanks to customer service for helping me find it 512966
by: Eric04/27/2018
Product arrived early then expected and was exactly what I ordered. 501519
by: Mark P02/10/2018
All good with the wiring harness. Exactly what I needed. 474539
by: Michael11/13/2017
After having my boat trailer powder-coated blue, this was a good match for the trailer. And I like being able to disconnect the entire harness. 451711
We sold the boat and trailer in August ‘18. The guy who bought it was impressed that I had completely rebuilt the trailer and that it had led lights and color matched cables instead of chains.
Michael - 11/13/2018by: RP12/02/2016
I am customizing my Jeep Wrangler to tow behind my motorhome. This coiled electrical plug was exactly what I ordered and needed. Excellent customer service always! I'm grateful to have etrailer to help me when I need it. I will always go to etrailer first! 321775
by: ikiebd10/01/2016
Wow, what great service, I needed it fast and they got it to me on time. I am so grateful and the product is exactly as described. 302291
by: Jim S07/02/2016
Great website. I used e trailer once before with great results. I purchased a new RV and needed to replace a 4-WIRE to 4-WIRE cable with a 7-WIRE to 4-WIRE. GOOGLE sent me to e trailer. Their price was $25 less than three places that I visited in person, even with their shipping. 267598
by: Dan05/31/2016
Installed very good to my Tiffin 34TGA RV. 254450
by: Johnny C04/21/2016
Hooks up fast and has weathered well the first year. 246427
by: Kevin C09/21/2015
Delivered on time. Works well. Best p rice. 226668
by: Ron W.02/13/2015
The product was delivered PROMPTLY. Thanks for great service. 173626
by: camphost Carl12/17/2014
Hopefully its excellant, I havent tryed it yet, but im sure its fine! I will shop here for more of my rv parts. the prices are very reasonable compared to CW! 165844
by: Bertram Pryor10/28/2013
Just what I ordered; fast response. Enjoyed doing business with you! v/r, 105416
by: Theresa08/06/2013
Great product but even GREATER SERVICE from eTrailer!! Thanks for the quick shipping & telephone assistance ! 93577
by: MARK V.08/05/2013
Thanks 93223
by: Charles04/12/2013
Product looks to be of good quality although I have not installed it as of this writing. Shipping was very fast and materials packaged securely. 75452
by: michael K03/08/2013
Works Great. A price need to be a lot l ess! 69654
by: Mark12/05/2012
Product as expected 60678
by: spence02/23/2012
This wire kit is easy to install and makes quick work of unhooking my toad. 32321
by: Paul B12/16/2011
Arrived on time, perfect condition too. The whole kit was perfect for my application. 28204
by: Kathy05/19/2011
This is exactly what I needed. I am very happy. The order got here quick too. 14833
by: Mike05/02/2011
Easy install. Great product. 12668
by: Carl G.04/25/2011
Seems to be will made and extremely quick service on shipping out the product. 12327
by: Mike04/12/2011
Very nice 7 to 4. 11556
by: Mark03/01/2011
Great Products and great service 8180
by: Billy Smith02/25/2011
Exactly what I wanted. Etrailer is excellent seller. 7878
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