We have a 1985
Bigfoot 175G with an
electrical issue. All driving (running, tail, brake, and signal lights) work EXCEPT the right tail, brake, and signal. Any time power is on to the trailer, the dual filament bulb (tail, brake/signal) glows with a vengeance (see 13.5 volts below). I checked the ground and there's continuity between the left and right grounds and the left
light works fine. When I energize the brake/signal by hooking the
battery with jumpers to the trailer's pigtail I get 12.65 volts at that side of the socket and likewise in the other pin when I energize the tail
light. Now for the weird. A voltage reading across the 2 positive socket pins yields 13.5 volts, even with the ground wire severed. I know, dead short, right? No burning smells, or damage evidence in the fuse panel, the converter, all connections seem tight. I just can't seem to locate the problem so hoping someone has seen this before.
I assume that since with just the
battery turned on the one bulb burns very bright it would seem power for the driving
lights does pass through the power center.
It worked fine last season, and the trailer was plugged in and heated all winter. There's no evidence of mouse activity, either.
Thanks in advance,
Alan and Barb