RV dealer messed up wiring...
The time had come for me to test hooking up my car to the trailer after I upgraded the house batteries and installed my big inverter. When I bought the trailer, I also bought a brake controller, 7-...
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I'm sorry- I don't see the OP doing anything wrong. If the dealer installed a heavy duty charge line, they most certainly should have installed a heavy duty ground- in fact just having electric brakes makes a minimum of a #12 ground absolutely required.
