Will the Roadmaster Battery Charge Line Kit Charge the Battery With the Motorhome Off

Question:

I have this system hooked up to my 2020 RV and 2007 Jeep Wrangler. Do I need to turn the key off or unplug it in order to keep the battery charge when not moving?

asked by: Sue

Expert Reply:

In order to determine if the Roadmaster Battery Charge Line Kit for Towed Vehicles part # RM-156-25 will charge your vehicle's battery with the tow vehicle off you simply need to test the 12 volt power pin in the 1 o'clock position on the vehicle side trailer connector. If you get power on this pin with the motorhome off then power will be sent to the vehicle's battery so long as the trailer connector is plugged in. If you get power to this pin only when the motorhome is running then you know the vehicle's battery will only be charged when the motorhome is running. This has nothing to do with the Roadmaster Battery Charge Line Kit per say but rather how your motorhome is wired.

If the 12 volt power pin is only hot when the motorhome is on and you need it hot all the time then you can just run your own wire from the trailer connector to the battery on the motorhome with the Roadmaster Battery Charge Line Kit for Motorhomes part # RM-156-75.

expert reply by: Conner L