Truck harness or trailer harness issues.
This is a runoff from a previous post I had. I'm not getting brake lights or blinkers on my camper. From a suggestion on my previous post I checked the terminals of the harness on the truck. Yellow wa...
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Sounds like the truck is OK, you confirmed you have voltage on the left stop/turn (yellow), the right stop/turn (green), the charging line (red) and running lights (brown). If there were any fuses blown on the truck you wouldn't have seen those voltages at the connector.
The most common problem is a bad ground in the camper lights. Take off the lenses and look at the bulbs and sockets, check for corrosion on the ground connections. That's the reason you're not getting any lights at all, because all tail/stop/turn functions require a good ground.
Also look on the frame under the batteries or where the umbilical cord terminates at the camper. Usually the white ground wire in the 7-wire cord is grounded to the trailer frame, and then the frame is used as a common ground throughout the trailer. Take those connections off of the frame, clean them up and apply some di-electric great when re-attaching.
The most common problem is a bad ground in the camper lights. Take off the lenses and look at the bulbs and sockets, check for corrosion on the ground connections. That's the reason you're not getting any lights at all, because all tail/stop/turn functions require a good ground.
Also look on the frame under the batteries or where the umbilical cord terminates at the camper. Usually the white ground wire in the 7-wire cord is grounded to the trailer frame, and then the frame is used as a common ground throughout the trailer. Take those connections off of the frame, clean them up and apply some di-electric great when re-attaching.
