Hey guys, I got a bit of a problem with my reverse lights on my '93 F150. It has the 4.9L inline-6 with the ZF heavy duty transmission with the granny gear. When I bought the truck, the reverse lights didn't work. I just recently replaced the Backup Light switch on the transmission and they still don't work. I checked the bulbs, and they're fine. I know that I've been leaking transmission fluid from the mating surface between the transmission and the transfer case. Could it be because there isn't enough fluid? Maybe there isn't enough pressure to push in the switch? Or maybe it's electrical? Please help, I've been trying to figure this out and it's starting to bug me haha. Thanks in advance!

 

Get a multi-meter and a wiring diagram and chase the circuit. Start at the fuse block and work your way along the circuit till you find the problem