I recently picked up a camper shell for my 22 PB and I have been having a hard time finding 12v for the third brake light hookup. I located the wire under the air box but unfortunately it is dead. I double checked on a co-worker's truck (23 5.0) and found that he had voltage on this wire when the brake was pressed so I know I am on the right wire. I have checked all fuses that seem relevant, and everything looks good. I have asked the dealer for help, but they have not been able (or willing)...
12v out for 3rd brake light on camper shell?
12v out for 3rd brake light on camper shell?