I've revisited a long-running problem that's been occurring in my 01' Deville. My Driver's Side Seat doesn't respond to any of the power seat controls. I went through the alldata troubleshooting process. The circuit breaker tests good, the passenger seat works, there's voltage at the harness in the rear of the seat. The kicker is that the seats started to move when I used the memory controls! Driver 1 -> Exit -> Driver 2
I have the pinouts for the seat control switch module. I found the orange bat + wire but I didn't get any voltage on it. There is supposed to be a black ground wire on pin 'L' , which isn't there. Not only is it not there in the harness, i can't find it anywhere back in the splice. I went ahead and wired my own ground to the battery and put my multimeter across the battery ground and the orange wire for the seat control module and I still got nothing. Plugged it into the module like that just to be sure and sure enough nothing.
Any Idea of what could be causing this?