Passenger door lock issue (odd)

[atckilla]

First off, thanks to all the people on here who assisted me via this site with my motor swap. The car's been running awesome since then, and the stickied common problems section has helped me fix my heater problem, and my speedo problem, and I am now down to only one issue with the pathy.

 

So, the problem.

1991 4x4 wd21.

 

The passenger door lock will not unlock when the drivers side is being unlocked by the key. Out of all four doors, when I unlock and lock the drivers door the passenger door is the only one that won't unlock. I have to do it manually by pulling or with the key. This isn't the plastic tab issue because it locks/unlocks with the key, but will only automatically lock. I grabbed a 2nd unit from the junk yard, and they both work exactly the same automatically lock, but wont unlock. I'm guessing it's not getting power from a wire maybe that sends the signal to unlock? but that's where I need the help of you guys.

Thanks for looking!

[Precise1]

I'd try running test wires right out of the driver side control switch to the lock actuator from the JY, bypassing all the wiring in the truck. See if it works right then If so, rerun wiress...

 

B

[atckilla]

so the drivers side is a master control for the rest, I guess that should have been obvious when it locks and unlocks the rest of them.

I'll give that a try.