The monitor light for the Roadmaster InvisiBrake Supplemental Braking System # RM-8700 would need to be grounded to the chassis of the motorhome. The LED light and audio signal will both have a wire to run down to the chassis and another wire to run over to the towed vehicle to connect to the cold side of the brake light switch. To accomplish this you'll most likely need to extend to wire to run it down to the chassis and then use a ring terminal and self tapping screw to connect the wires... view full answer...
If you are installing a charge line from the Roadmaster Battery Charge Line Kit for Motorhomes # RM-156-75 to use the Extension Cord # HM47054, the 12 volt power line will be the one I pointed out in the accompanying diagram.
It will be the pin in the 1 o'clock position if you are facing the 7-way connector from the outside.
I have also added a link to a help article on wiring which has this same diagram available. view full answer...
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