[jocko]

So, my truck had an ancient electrical trailer brake adjuster wired into the brake light switch circuitry - problem was that the only time my rear brake lights would actually come on was momentarily during pedal depression and again during pedal release. Hmm, weird. I don't plan on trailering, so just to get this thing safely on the road with functional brake lights, I eliminated the trailer brake bias box. Now the orange and white wires connect directly to the brake switch. I've checked clearances, pedal depression in fact releases the switch as it should and I've also checked the switch - infinite resistance with the pedal released, zero when pressed, so seems the switch is good to go also.

Interested in your thoughts as to what might be the problem. PO has a no-kidding rat's nest of wiring crap all over the truck. I'm gonna go stare at it awhile and scratch my head a bit longer, but wanted to see if anyone's ever had a similar problem (and, more importantly, what the solution is).

Probably going to run and grab a new switch just in case, even though it checked good, but just want to eliminate any funny bizness. But I think I've completely eliminated any input from the trailer brake setup by removing the box and wiring the original wires direct to the switch. Hmm.... Thanks in advance.