I have a rear door in my '96 burb that sometimes simply does not respond to the lock/unlock switch on either front door. Am I looking at a solenoid issue here?
If so, is there a cheapo fix that I can use like some other vehicle make owners do that is sometimes called the "foil fix" (using a piece of aluminum foil on the solenoid)?
If non of the locks work it’s a fuse, maybe.
If it’s just one door could be a lot of things.
First get a helper to push the lock button while you are at the back door and listen for the solenoid. If you hear the solenoid then it’s a rod has come loose or broken.
If you don’t hear the solenoid then pull the access plate off the door side and look inside to see if it’s come unplugged, (not likely) if not unplug the wire going to the solenoid and put a 12 volt test light on it and have your helper hit the switch again.
No juice, you have a wiring problem.
If it has juice solenoid and it doesn’t even try to move then it’s shot.
If it just try’s to move but not enough then it’s a dirty, pull the rubber boot up and try cleaning it. If that doesn’t work it’s a dirty rod, take the door pad off and clean anything that moves that is attached from the solenoid to the lock switch and then to the lock.