RoadMaster 7-Wire to 4-Wire Straight Cord Kit

RoadMaster 7-Wire to 4-Wire Straight Cord Kit

Item # RM-98164-7

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Roadmaster Extension Accessories and Parts - RM-98164-7
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Product Images

  • Tow Bar Wiring
  • Extension
  • 7 Blade to 4 Round
  • Roadmaster
  • Straight Cord
Easily and effectively connect your motor home to your towed vehicle with this water-, oil- and chemical-resistant electrical cord. Perfect for RoadMaster's All Terrain tow bars and tow bars with cable channel guides. Call 800-298-8924 to order Roadmaster accessories and parts part number RM-98164-7 or order online at Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for RoadMaster 7-Wire to 4-Wire Straight Cord Kit. Accessories and Parts reviews from real customers.

  • All Info
  • Reviews (7)
  • Q & A (7)
  • Videos (2)
  • Photos
  • Why etrailer?

Roadmaster Accessories and Parts - RM-98164-7

Easily and effectively connect your motor home to your towed vehicle with this water-, oil- and chemical-resistant electrical cord. Perfect for RoadMaster's All Terrain tow bars and tow bars with cable channel guides.


  • Adapter cord can be used for multiple towing applications
    • Perfect for running power from your RV - with the 7-pole - to your towed vehicle or trailer
  • Straight cord model is ideal for all-terrain tow bars and other tow bars that have channel guides
  • Silicone-injected plugs prevent corrosion
  • Electrical cord is water-, oil- and chemical-resistant
  • Includes socket mounting bracket and hardware
  • Overall length: 6-1/2'
  • Made in the USA

98164-7 RoadMaster 7-Wire to 4-Wire Straight Cord Kit

Video of RoadMaster 7-Wire to 4-Wire Straight Cord Kit

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

Video Transcript for RoadMaster 7-Wire to 4-Wire Straight Cord Kit Installation

Speaker 1: Today, we're going to be taking a look at the Road Master Seven-Wire to Four-Wire Straight Cord Kit. Part number is RM-98164-7. Now this Road Master Straight Cord Kit is going to allow us to use the standard seven-pull connector in the back of our RV and convert it into a four-pull round signal for the front of our towed vehicle. This is going to give us ground, running lights, left turn and break signal, and right turn and break signal. Now, the overall length is six and a half feet. So, if that matches your need, this might be the perfect solution.

Now to connect from our motorhome here to our towed vehicle, you can see we've got our four-pull wire here. If you're tow-barring, the thing about the straight style cord is if your tow bar head's keepers will be able to slide that through.I also sometimes prefer these to the coil types because you don't have to worry about them bounding around so much. You can zip-tie these right off to your tow bar and keep it nice and neat rather than the coils bouncing. We're going to pull that little set screw out .. and slide that out.

Now our wiring will come through the backside just like that. Black plastic ring is going to go around, then we can make our connections on the backside of our plug. So, we'll start with the top one. It'll be on the right side looking at the front. That gets our right turn signal.

The top left gets the left turn signal. The bottom right gets our brown wire, which is our tail light signal. Then, our ground will be the last one.Now, we'll reassemble our plug. We'll slide our cover back over. Slide this back up inaudible 00:01:59.

Realign the nut with the hole and replace the little set screw. Now, we're ready to plug right into the front of the vehicle in the socket we previously installed. Now, you'll plug your seven-pull in right through the back of your RV. That's going to complete our look at the Road Master Seven-Wire to Four-Wire Straight Cord Kit, part number RM-98164-7.

Customer Reviews

RoadMaster 7-Wire to 4-Wire Straight Cord Kit - RM-98164-7

Average Customer Rating:  5.0 out of 5 stars   (7 Customer Reviews)

Easily and effectively connect your motor home to your towed vehicle with this water-, oil- and chemical-resistant electrical cord. Perfect for RoadMaster's All Terrain tow bars and tow bars with cable channel guides.

- RM-98164-7

Fast shipping, excellent product, great seller 460251

- RM-98164-7

Has worked great for a year now - no issues. Was easy to install. 251020


Product is working fine - no issues.

Sig - 01/30/2018


- RM-98164-7

exactly what I was looking for and at a fair price. I'll definitely use them again. 226077

- RM-98164-7

You folks don't have a rating beyond EXCELLENT, so I'll have to stop there, however, it truly is beyond EXCELLENT. Thank You! 143813

- RM-98164-7

It will be a while before I get this installed, but was great at keeping me informed and getting me the part that I required. This is a replacement part and it is exactly what I needed, so I expect no installation problems. Wouldn't hesitate to order from again. 135110

- RM-98164-7

Great cable 13085

- RM-98164-7

The correct product, properly packaged, no damage. Working with etrailer was one of the best internet purchase experience I have ever had. 7884


Ask the Experts about this Roadmaster Accessories and Parts

Do you have a question about this Accessories and Part?

  • Recommended Flat Towing Set-up For 2015 Jeep Wrangler Sport
  • For your 2015 Jeep Wrangler Sport, since you already have your Roadmaster StowMaster Tow Bar, # RM-501, we will start with your base plate needs. The # 1175-1 Roadmaster base plates you have are not compatible with your Jeep, so I recommend going with the Roadmaster EZ4 Base Plate Kit - Removable Arms, # RM-521448-4, which is compatible with your Jeep and your current tow bar. For your Jeep tow wiring, I recommend the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles, # HM56200....
    view full answer...

  • How Long is the RoadMaster 7-Wire to 4-Wire Straight Cord Kit # RM-98164-7
  • I spoke to my contact at Roadmaster who told me that the 7-Wire to 4-Wire straight cord kit, # RM-98164-7, is 6-1/2 feet or 78 inches long. If you need even more length I recommend the Flexo-Coil kit, # RM-164-7 which is 8 feet or 96 inches long when stretched out.
    view full answer...

  • Wire Functions for 7-Wire to 4-Wire Kit RM-98164-7 with Black, Red, Yellow, and White Wires
  • Roadmaster has switched wire colors on 7-Wire to 4-Wire Straight Cord Kit Item # RM-98164-7 and now uses green, brown, yellow, and white. But in either case white is the ground, red is likely left turn/brake, yellow for right turn/brake, and black for running lights. But there is an easy way to figure this out. Check the other end of that blue cable where it goes into the 4-Way round connector. Looking at the back of that 4-Way round where the wires connect top right is right turn/brake,...
    view full answer...

  • Wiring Extension for Use with a Roadmaster Sterling Tow Bar
  • For your Sterling tow bar I recommend Roadmaster extension # RM-98164-7. It is a straight cable with the 4-Way unattached so you can route the wire through the guides on the Sterling tow bar. With an extension like # RM-164-7 you would need to wrap it around the tow bar arm instead of using the guide channels on the Sterling tow bar.
    view full answer...

  • Replacement Wiring Connector from Motorhome to Jeep for the Falcon All-Terrain Tow Bar
  • We do have a variety of wiring kits from Roadmaster that are used for flat towing with your Falcon All Terrain # RM-522. I am not quite sure which one you have but I will list the ones out that can be run through your tow bar. For blue wires we have the 7-Wire to 4-Wire Straight Cord Kit # RM-98164-7 and the 4-Wire Straight Cord Kit # RM-98164. If you have a larger connector on on your Jeep then we also have the 7-Wire to 6-Wire Straight Cord Kit # RM-98146-7 and the 6-Wire Straight...
    view full answer...

  • Umbilical Recommendation and Install for Use with Roadmaster Bulb and Socket Kit
  • To use the part # RM-98164-7 as an umbilical with the part # RM-155 you would need to cut the 4-way off the jumper wire of the # RM-155 and then wire it to the 4-way round female socket that comes with the part # RM-98164-7 that you referenced just like you said. You may not have to use the jumper cable of the # RM-155 either if the main harness can reach the front of the vehicle after the bulbs are installed.
    view full answer...

  • 7-Wire to 4-Wire Straight Cord Kit # RM-98164-7 Recommendation for Towing a 2007 Jeep Liberty
  • Yes, this RoadMaster 7-Wire to 4-Wire Straight Cord Kit, part # RM-98164-7, would be long enough to be used to go from the back of your tow vehicle along your tow bar to the front of your 2007 Jeep Liberty. If you wanted to use a flat 4-way instead of the 4 way round you could easily do that by installing a Tow Ready 4-way, part # 18002, onto the end of the # RM-98164-7 and then installing a 4-Pole Trailer End Connector, part # 18004, onto the tow bar wiring that is on your 2007 Jeep...
    view full answer...

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Info for this part was:

Photos by:
Theodore B
Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Video Edited:
Dustin K
Test Fit:
Randy B
Video by:
Zach D

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