Problems with automatic locks

Something is up with my locks and I don't know what to do. When I lock the doors sometimes not all of them will lock. Usually there is always one that will not. And when all the doors do lock, the lock system must think it is not locked because it keeps trying to pull the lock down even though it already is. Any suggestions?

I'm guessing you have a 94-97 model correct??? These models have a common problem w/ the door lock actuators. the actuators run about $90/ea for the front and about $100/ea for the rear. if you're not wanting to spend that much...just manually lock/unlock the doors.