I'm having the same problem you had, tail lights and dash lights on a 96 lumina are not working.
That went on for a while, now the brake lights (left and right) don't work either, but the center one in the window does.
Mechanic tells me it's due to the contacts in the Driver's side under the hood Fuse block being corroded. Problem is, he's looked everywhere, even checked hardware stores, GM dealers, and can't find replacement contacts! (He calls them "female ends for the maxi fuses". )
When he ordered a new Fuse block from the GM dealership, he got just the plastic honeycomb, no contacts inside. He needs the ones specifically for the maxi fuses he says.
Where did you buy or find the contacts? We've looked at some junkyard parts (get the fuse block with wires still attached) but the contacts are just as corroded!
Any clues would be MUCH appreciated, it's either find the contacts or junk the car at this point for me.
Monday, November 12th, 2018 AT 8:16 AM