Auto Door Locks

First time poster,long time lurker.

I have a 99 Taco I bought new in 98 and just recently had trouble with the passenger side door lock not wanting to unlock with either the key from the outside the driver side or the rocker switch mounted in the arm rest on the driver side.But I can manually unlock the passenger side with the key from the outside
My question which door lock switch actuator pass/driver side needs to be replaced to remedy the problem?
Thanks in advance for any insight.

 

Pull the passenger door panel in there you can test and see that power is getting to the actuator when you press the switch that will help you determine if it is the actuator or he wiring if the drivers door lock still works from the switch it can't be a bad switch. Chances are its a bad actuator they aren't very durable. Also if you unplug the actuator you can use a battery like one from a rechargeable drill to test the actuator itself and see if it moves with power allied directly to it.

 

Thank you I will go that route!