My 1992 Jimmy has the electric push-button toggle switch on the dash to engage/disengage the 4-wheel drive. The engagement does not work. The indicator lights on the switch come on briefly when I turn on the ignition, which is right. But I used to hear a click from under the vehicle when I pushed that button, which is not happening now. There is no change in vacuum in the hose going to the front wheels.
Nov 16, 2009 at 8:55 AM