Hi, I have a problem with some vdc, slip and abs lights coming on. I did have the truck scanned at the dealer and it came out with couple codes including the diff lock sensor. It seems to be consistant with the fact that it came on for the first time when i just disengaged the diff lock. Anyways, i was wondering if some of you knew how to diagnostic a broken diff lock sensor. From what I understand, it looks like a pain in the ass to replace and I dont want to change it if that is not the problem. My guess would be that it is a different resistance from the sensor depending od the position of the lock but I cant find those values anywhere. It might even be an open/close swith but I guess then the computer wouldnt be able to tell if the wire was cut or anything. Do you know where I could find the diagnostic charts for that or some wiring diagrams? Thanks.