Driver side door locks windows mirror turn signals stopped working checked wiring from the door to fuse box inside the door all good did find in fuse panel 12 volt on half of the fuses rest are only 2.5 v there are two bigger red wires that plug into the back of the panel only one is 12v the other nothing looking to find out if both red wires are supposed to be 12v or not

I have an 03 2500hd, swapped out the standard bed for a flat bed. I connected the flatbed lights to the trailer light pigtail. It’s been 9 months since I did this conversion and have had no lighting issues whatsoever until just this past week. Parking lights, blinkers, hazards and reverse lights all function properly except for the brake lights will not turn on when you apply the brakes. I have checked every fuse, main switch, brake switch and the wires, but I can’t seem to figure out what is going on. The third light works but I can’t get a blip of a signal from the brakes on the trailer side of the harness. Any clues would be greatly appreciated.

Front left turn signal does not blink nor emergency flasher

Running lights and low beams work fine. Highbeams do not turn off; had to pull fuse

Can’t find head light fuse lower by l/s

I went to start my truck and the service 4wd came up on the dash, then my cluster gauge light last quick working, my lock unlock function quick working both with the fob and inside the truck, also my auto head light switch does not work. I have to manually turn on my head lights but the HI beams don’t work.

The right turn signal and brake light do not operate when switched on