Here is what I have. No 4WD light and no 4wheel drive. When engaging no light and 4wheel drive. I checked the switch on the trasmission and it was good. Any ideas? I have a Haynes book that is useless when it comes to using it to troubleshoot the 4 wheel dirve system. It is like not being told to go into 4wheel drive....... Please help

 

have you checked the fuses? relays?

 

Yes, I checked all the fuses and relays. and the vac at the front drive. I need a schmatic to go by and the shop manual I have has nothing on the 4WD system