Guys I have a 1988 GMC Sierra 3500 4x4 SLwith stock windows and locks without power. I recently bought a set of new doors off a 1988 2500 SLE. They have power locks and windows however I do not have the wiring harness that connects from each door to under the dash to get power to the doors. I have had hell trying to get the harness and have had no luck. What I need is a diagram on how to wire these up so they work. PLease help