Hi all

The fuse for the left turn/stop light blows immediately when power is applied either by brakes, left turn or flashers.

I've done a continuity test on the left turn wire from the junction box under the pin box and it shows a short to ground. I disconnected the left tail light and the short remains.

I want to trace wires and check for pinches and lost insulation. Also, I'd like to check the splice where they wired in the 4 way trailer connection in the rear.

Any recommendations on how to access the wiring? I see where the trailer wire enters under the rig but I don't see anyway to inspect it without cutting floor. Is there a better way?

Thank you
Bob