Just in time for snow, my 4wd decided to stop working. I have the 4wd without the push button selector. I narrowed the problem down to the 4wd switch on the top of the transfer case. No matter if the transfer case is shifted into 4wd or not, there is no continuity. To see if I could get the ADD control system to function, I temporarily put a toggle switch in place of the switch on the transfer case, and i can get the ADD system to engage, and the dash light to come on.

I lifted the car off all four tires to check if the front wheels spun, and no matter if shifted into 4wd high or 4wd lo, the front drive shaft does not spin. It worked properly a week ago, and I cant see why the transfer case would suddenly stop working. Any input would be much appreciated. thanks

 

its prob just a bad sensor.