Hi all,

My driver's side lock button isn't working. The unlock on the same button works but just not the lock. When I lock using the passenger side button, it works. Any ideas on what's going on with the driver's lock button?

 

Maybe some moisture got in there and caused oxidation or crud on the switch. Might take the door card off, remove the switch and inspect it, inspect the wiring connector, inspect each pin.

Then inspect the rest of the wiring. Maybe someone ran a screw through it installing a speaker or something, if you're not the original owner.