Just replaced all outer handles and 2 interior handles and a door latch on a sport track. The biggest problem with the locks were that they needed to be lubed. Take a spray like wd-40 and spray the latches. If the door panels are still off then it is easier. Also spray the window sliders to have them work easier. All the actuators work off the same signal. The one that does not work just may need a little lube.