How Does the Charge Line from a Motorhome to Towed Vehicle Work Together
Updated 11/21/2024 | Published 06/27/2022
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Question:
How does the car and Motorhome Charging Kit work together. I have a hot wire on the Motorhome in the 1:00 Position 7 RV Blade socket and the towed car Hot wire in the center post socket 6 Pole Round I checked both socket with a Tester and they are hot.
asked by: Richard B
Expert Reply:
The Roadmaster Battery Charge Line Kit for Motorhomes # RM-156-75 uses a 12 gauge wire and circuit breaker to route to the positive battery post in your motorhome and the number 4 pin in the included 7-way photo.
The Roadmaster Battery Charge Line Kit for Towed Vehicles # RM-156-25 uses a 14 gauge wire and circuit breaker to route to the positive battery post in your towed vehicle and the number 2 pin in the included 6-way photo.
You would then need a 7-Wire to 6-Wire Cord like the # RM-1676-7 to connect the 7-way from the motorhome and 6-way from the towed vehicle.
(click to enlarge)
(click to enlarge)
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Roadmaster Battery Charge Line Kit for Motorhomes
- Accessories and Parts
- Flat Tow Wiring Harness
- Battery Charge Line Kit
- Roadmaster
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Wyatt R.
11/21/2024
I"m using the RM charge line kit. Hooked it up last night after getting my roadmaster tow bar. I did a voltage test on the 6 way plug and the charge line is HOT. Shouldn't it have a one-way diode or something to prevent the towed vehicle from sending a charge back to RV battery? I've read lots of posts online about charge line and only a few people have installed a one directional something. Some of the more expensive kits seem to have something like that. A few have commented that the towed vehicle can charge the RV battery if the RV battery is low. Thoughts? If i want to make it one-way what part do i need to install between the RV side of the fuse and the 6-way connector? Taillight hook ups use diodes which says it prevents the signal going back to the RV. thanks, Wyatt