1996 7.3 F-350

[richardndawnc]

wiring on brake lamp switch gets hot , only when trailer is connected. If you wiggle the wires inside the column it will work for a few min. and then the lights get stuck in the on position once again, the only way to get them to go off is to unplug the switch on the pedal at this point. The plug on the boo switch is melting its getting so hot, but w/o trailer plugged in ,I have no issues, but the only way to make it woirk is to wiggle wires going to the turn sig switch -- any ideas?? my driver is broke down with this issue over 400 miles away and its hard to diagnois without being there, hopefully someone may have run into this before
thanks.

[MrJohnWayne]

hmm. Not sure if this is any help, but my brake controller was shorting out internally causing the brake lights to stay on, but that also happened with no trailer connected. The only other thing i can think is the wireing on the trailer. Does it have a hot wire to charge a battery for trailer brakes. Maybe the plug or wireing is shorting out and it is sending that constant power to the brake light circut...

[richardndawnc]

I had him cut the wire to the controller , and it still is doing the same, I will have him look at the wiring to the brake away -- thanks for the help

[Bestroken]

Sounds like the problem is on the trailer end. Check that the break away batterie is not shorting anywhere. I have even seen where bulbs have burned one element and it falls inside the bulb and touches the other element, feeding current from one circuit to the other. Good luck