ok man I had the same problem with my coupe deville 81, It's probably the fuse ( mine was a 30 amps green one ) in your fuse box under the dash near your feet I guess.
I had to replace the ground in the door cuz It was always burnin my fuse up when I replace it, now it's perfect and my door lock, interior light n front light are well workin !
Check your fuse box man !
I had to replace the ground in the door cuz It was always burnin my fuse up when I replace it, now it's perfect and my door lock, interior light n front light are well workin !
Check your fuse box man !