Spray some WD40 in it,have a rag with you because it will run back out you don't want it on paint or any other material.
Remove the door panel, find and repair the lock linkgage.
The linkage is not connected to the door lock barrel. You will need to remove the inside door panel. Connect the linkage to the door lock barrel.
It depends on what vehicle you need to repair it on.
Thedoor latch/lock assemblies are not repairable. Replace it with a new one.
If your windows still work on the switch than it is most likely that the switch is bad I had the same problem with mine and it was the switch
I need to know how to repair the power lock on my corola dx 95 rear right door the door panel must be removed there is a electronic lock solenoid that controls the lock eods to door latch. if it grinds or makes noise replace solenoid if there is no noie check for a 12volt signal at plgs to lock solenoid if ther is no power sometime wire breaksin the door jam harness from opening and closing door wires bend back and forth and are known to break 80 % its the lock solenoid
u will probably need to remove the door card and gain access behind the door handle to remove the lock. Glad to be at assistance
remove interior door panel to access power lock mechanism.
Either replace the lock or disassemble it for manual repair.
You have to take the trim pad off and get inside the door.
You can get a diagram for the door lock assembly in the Haynes 99 Mercury Mountaineer Repair Manual. The book is available at most auto parts and major book stores.
power lok actuators are located on door latch don't understand repair?