Hi everyone....

My 92 LX power door locks work this way now: I can close all doors by turning the driver's door key **** but will not open (all the same time) if I do the same thing. How should I trouble shoot the problem?? Is it the relay or something else?

 

it could be a few things....the switch inside the door to tell the others when to lock or unlock could be bad....broken connection on the unlock side somewhere or a bad relay.

Does the underdash relay click when you unlock? If so, first double check the output from the relay, as it may click, but not output anything...if alls good there, look between the relay and the other doors....

if no click at all, first double check the inside the door switch wires at the relays, does it get to the relay? if so, then the relay is most likely the cause, replace with a new one and test. If there is no output from the switch at the relays, you'll need to pull the drivers door panel off and test the switch directly, if still no output, replace the switch, if there is an output, check the wires from the switch to the relays.

start with that....i bet you get it working in no time.