Thedoor latch/lock assemblies are not repairable. Replace it with a new one.
The door lock, on your 1999 Mercury cougar, can be replaced by removing the inside door panel. The locking mechanism is easily visible and can be changed.
How do you repair drivers side door latch mechanism on 98 GMC extended cab pickup?
repair or adjust the latching mechanism
A sliding mechanism to repair a sliding van door can be purchased from a dealer for the vehicle in question. It is sometimes possible to find this part at an auto salvage yard.
The 1995 General Motors/GMC Sonoma has the door lock motors and actuator assemblies. These are located in the driver and passenger side doors, behind the door trims.
Take the oven to an appliance repair shop. It sounds like the door safety interlock has jammed the opening mechanism.
how to remove the door panel on a 1992 mercury cougar
chilton manuals at parts store
The inside handle has a screw at the base, just inside of the opening in the door. It can be reached with a screwdriver and removed to take the handle off.
Remove it and find out why it doesn't operate properly and correct the problem or replace the whole thang.
Not any relays, there are actuators inside the doors that move the lock mechanism. Also your switch in the door, the fuse, and the wires.
remove interior door panel to access power lock mechanism.