I just bought my wife a 03 venture and there is a light on the dash that says awd disengaged. I did some searching and found that the wiring harness gets corroded where it passes through the floor. i checked the harness and cleaned it but the light is still on. I have heard there is a sensor in the rear differential and maybe one on the transmission. Any info on these sensors or any other common fixes for this? Any help would be great. thank you!