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Hello all, we diagnosed it and it was indeed the relay that was bad behind the speedometer. Replaced that and the lights work. The only things that dont work yet are the brake and back up lights. We found out that the back up lights were disconnected and the part that is in the steering column...

Yeah, we tried that and it didn't really help unfortunately. Do you know if there is a relay in the dash somewhere? Or is it just a bad ground somewhere? Also what is defined as the "service lights" on the truck?

Hello all, Our CUCV M1028 at the fire company has no lighting that works, brake, reverse, turn signal, 4 way, headlights, parking lights. Me and my dad bypassed the toggle switches for the blackout lights on the lower left side of the dash with a paperclip and everything worked except the brake...