93 S10 4 wheel drive problem "UPDATE"
have a 4.3 ltr. automatic, s10 pickup (93) with the 4 wheel drive selector on the floor it has a shift "lever", as opposed to the ones with the switch mounted on the dash (button). Its not been drive...
Forum Discussion
It is engaged by a thermal expansion device on the differential. If it does not move the switch giving you the light indication does not become engaged. You can get under and check the wiring connector, a simple unplug and plug in sometimes fixes the problem. The device is easy to replace and is not very expensive. However my experience was with a 94 K1500.
