I have a 2001 Sequoia, using info found on this forum I was able to repair the motor of my rear window and replace the acuator in the rear liftgate. Unfortunately, my rear door still does not lock. When using my key, switch or remote, I can lock all the other doors but rear liftgate still will not lock. The rear door opens and closes fine, but will not lock. Does anyone have any suggestions? Could the actual lock be bad or something else?