Originally Posted by tyler003
I have a 1997 Jeep Grand Cherokee that I have recently purchased. While taking a further look into the vehicle I noticed that the lock/unlock switch on the drivers side door only partially worked. I am able to unlock the car, but pushing it to the locking side does nothing. On the passenger door the switch works perfectly. If anyone knows a trick on how to fix this or do I just have to go behind the door skin and check it out for myself. Thank you, Tyler003
First, I'd check the harness at the door hinges, sometimes they come loose.
Second, check where the that same harness plugs into the door/window switch inside the door and make sure it is tight, too. (My old ZJ had this happen)
Failing that, it could be the switch itself or a broken wire in the harness.
Or, sometimes the physical slider mechanism gets so dirty that the power lock motor can't push it. (Current ZJ had this so I took out the whole slider thing and cleaned and lubed it)
In any case, there's a bunch of stuff you can do to check it before throwing money at it.
When you try to lock it, do you hear anything in the door moving or just nothing?