Sounds like it's miswired somewhere.
Many of them get their power from the parking lights (I'm coming at this from a trailer perspective, so not 100% about a class C). I have to have my parking lights on to use the backup camera.
So somewhere the wires are crossed up where yours is getting power from the brake light instead of the parking light.
Question is where. If you are confident that your parking lights and brake lights are working normally, then the miswire is in the back somewhere.
But remember, the brake light is supposed to be brighter than the parking light, so be sure of that before you decide the lights themselves work normally.
If the parking light is brighter than the brake light, then something is reversed somewhere else.
Also ground wires that fall off can create ground loops and do strange things like this, even when the red wires are correct
__________________
TT - 2021 Rockwood 2608BS
TV - 2020 F-250 XLT 4WD SRW 6.2L gas
|