I am looking for a wiring diagram for 2003 rear door locks. I have searched online everywhere and gotten mixed answers which only made it more confusing. I am trying to find which is the lock and unlock wires for the driver rear door lock. My driver rear door lock suddenly stopped working both the lock and unlock function but the power window up and down function works just fine, the speaker works good too. I looked at the harness between the rear door and the pillar but no wires were broken, so I was hoping to find which wires control the lock and unlock functions to test the actuator itself.

 

FSMs are available online, downloaded the 2004 from this forum.

I haven't pulled a rear actuator, but if its like the front one, there is a removable plug on the actuator itself. I've tested the front ones using test leads. Usually removing the actuator (3 easy bolts and a couple rod clips, and door panel of course) so that I get good connection to the pins.

You could perform a continuity test on the door harness once you remove the connector from the door pillar and actuator.

Here is the wiring diagram out of the 2004 FSM

 

Thank you so if I put ground to the unlock wire and power to the lock wire it should lock, and then if I switch the ground to lock wire and power to the unlock wire it should unlock if the actuator is indeed good correct?

 

If that works, yes the actuator is good. If it doesn't work, you don't know if its wiring from your test point to the actuator plug - or if the actuator is bad. Good luck.

 

Thank you I appreciate it.