Freep wrote:
jmckelvy wrote:
Is it really the tail light or might it be the left turn light? Tail lights are normally wired in parallel with both rear tail lights as well as the marker lights on the same circuit. Either way it sounds like you have some sort of wiring issue.
It's the leftmost red light. So that would be tail/brake light.
The tail and brake are different lights or at least different filaments in a bulb. The point is if it's the tail light, the other side and the clearance lights are wired in parallel to it.
Since it's by itself, it's likely the brake/turn light (same filament).
I'd check inside the 7-pin (or whatever Lance uses) for a strand of wire that is bridging between the charge pin and the left turn pin. If it's the Lance plug, a diagram I found shows the left turn and +12V are next to each other on the bottom.
This guy had the same symptoms on a TT, but with a standard RV 7-way plug the right turn is next to the +12V. Unfortunately he never posted again.