I've been a member of this forum since 2009. We had a electrical issue with our liftgate that progressively got worse. I searched this forum many,many times for an answer. We tried many suggestion on how fix the problem. My husband finally got aggressive with looking at the wiring in the boot at the top of the liftgate Holy crap !!! He found 4 different wires that were broken. He striped them and put them back together. Now my wiper works, my liftgate locks and my back defrost works again. I am one happy camper.
Oh, BTW we have a 2006 Chevy Trailblazer 4x4