just finished 95 silverado now brake lights don't work and 3rd brake stays on

im new to this fourm ...i just finish a 95 silverado 2012 6.0 swap. everything works but my brake lights and my 3rd brake light stays on even when truck is off ?... tail lights turn signals work ..i changed the brake switch nothing ... i test lighted the wires for the brake switch orange 12v hot all time has power .. purple has power and turns off when brake is applied ...white has power all the time ( not sure its supposed to) ... I'm broken lol if any body could help me out i would be very great full... thanks

Sounds like you may have a ground problem buddy

In the process of removing your old wiring, did you get rid of any relays (whether it was in the glovebox, or on the firewall). I had this happen to me, all of my lighting was messed up because i cut the relay out of my OBS harness. I remember it had 2 yellow wires of the 5 all together. Mine was mounted on my firewall, but everyone else I have talked to had theres mounted under the dash or glovebox. Mine is a 94