My dad has a 1998 Ford Explorer fully loaded and the power lock function on the driver side door doesn't work anymore. I wanted to know if it was the button so I removed the button by taking the door apart and plugged the button in upside down on the passenger side. It worked perfect. So then I tested the power connections in the door with a voltmeter and the pink/yellow wire on the driver side is not getting power while the same wire on the passenger side is. There's 2 black wires, a red/black wire, a pink/green wire and a pink/yellow wire. The 2 pink wires are supposed to be hot and the blacks are grounds. The wires look perfect, I even sliced it up higher and tested it there but there's still no power in it anywhere. How far back do you think the problem is and what could it be? Any suggestions?