Vp central locking problem?

[93vp1car]

Hi guys, I've run into a problem with my central locking. The doors unlock but my back doors don't lock? I heard something a little while back about the rear wiring harness maybe? how do I check this? and is there other possibilities to what it could be?
Thanks for any help.

[93vp1car]

oh by the way its a 93 vp v6

[HSV.006]

this is a common as **** problem, dont know how to fix it though

[spark79]

i to have a 93 series 2 vp with the exact same problem, will unlock , but wont lock! but in sayn that if my car is left in the sun , like only in summer time(38-40 degress) the rear doors will unlock, it has me f@*ked as to what causes it?????

[Twisted]

VN, VP Commodore Power Door Locks fail

Recently my right rear door stopped locking/unlocking properly. I pulled out the door lock and took a gander at the power door lock actuator. The thing can't be triggered without power, so don't bother, but when trying to lock/unlock, it wasn't moving anyway, as if it had no power, and because that wasn't moving, it was stopping the mechanical lock operating manually. The problem with these GM actuators is that they aren't easily servicable, by the user. However, if you want to have a go, here it is:

Open the actuator at the seams. It can be quite difficult, I did it by shoving a flat-blade screw-driver down the cable-end, into the verticle gap closest to the edge, which started it opening. Then, I shoved another screwdriver down the same side at the other end -- by the actuator. Don't worry if it sounds like things are breaking, they are, and there isn't much you can do. Once you have it open, have a look at the wires connecting the motor to the circuit board. On mine, the red wire had disconnected. I soldered it back on, and put it back together (using masking tape to seal it again - it won't reseal), and it works perfectly again.

Hope this helps!

From: Phillip O'Donnell


Before you go ripping actuators apart, first simply look at the connector. Mine was dirty, all it needed was a clean, and a fine pick to bend the pins back out to make a firmer connection.

From: Ash

Maybe this might be of assistance to any of you.

-Twisted