I have an 03 Accord EX. The front/rear door locks stopped locking when pressing the button. The auto door lock button on the passenger side doors will function as normal, and will lock the drivers side doors. None of the auto lock buttons will lock either passenger door, however.

Suggestions?

 

This is going to be fun.

Let me see if I understand. None of the controls inside the car will lock or unlock the pass side doors?

 

Correct

 

First thing I would do is test the actuator. You can apply power and ground to it and verify one/both actaully work.

Next will be to verify the connections from the multiplex to the doors/actuators. Last would be the multiplex unit.