Originally Posted by
Shamrock
If I'm reading this right, the WT/DG wire on the door lock switch comes directly from the BCM and when the switch is activated, it connects to GND at G200. So if you can ground the WT/DG wire, the door locks should unlock. There is a resistor in the switch that changes the resistance to ground for the lock function. look at page 8w61-4 on the service manual to see the switch circuit. This should help you diagnose whether it is the BCM or a bad switch. Hope this helps.
Thanks for the reply, the switch and the BCM are fine. I tested the switch with a bulb and a multimeter the resistor is fine. I switched BCMs and they both function identically. My problem is there is no power in the switch circuit and therefore the locks cannot be operated using the console switch.
The ground is obvious and checks out OK, but the power is not there.