Hi all. I have a '99 Yukon and the rear door lock seems to have quit working in "power mode". I can still lock it using a key, but when pressing the power switch it does not lock or unlock, nor does the remote cause it to function. All four of the door locks work normally. I don't see any wiring entering the doors via flexible conduits, so I presume this lock operates via radio frequencies. Does anyone have an idea where I should start the troubleshooting process?
Thanks for any assistance, Ray