How To Add Towed Vehicle Battery Charge Line Kit To Setup With 4-Way
Updated 07/14/2026 | Published 07/12/2026
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Question:
I have a 7 pin to 4 pin cable and connector with my Air Force One system. What can be used to add a trickle charge to my 2017 Jeep Wrangler?
asked by: Bill F
0
Expert Reply:
Hey Bill! You can swap out the 4-way for a 6-way and use a 7-way to 6-way adapter which will allow you to add the charge line # DM66VR. The Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit # RM-146-7 has what you need to complete the installation.
Where are you headed once you get everything set up for towing?
expert reply by:
Robin H
0
Roadmaster Wiring Diagram
(click to enlarge)
(click to enlarge)
Product Page this Question was Asked From
Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit
- Accessories and Parts
- Flat Tow Wiring Harness
- Adapters
- 7 Round - Blade to 6 Round
- Coiled Cord
- Roadmaster
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Scott B.
7/14/2026
It's what I use mine for the last year. Works as advertised