My Dad's 1998 12 valve quad cab caught fire under the hood a month or so ago and he has almost everything working.
There are two problems though. We can't find where the vacuum line for the AC goes through the fire wall and the radio and interior lights don't work.
Fuses are good, and the wiring harness appears to be intact except one of the relays on the firewall is melted. Could that be the problem? Does anyone have an idea of where else to start looking?

 

The vacuum line for the Ac is a small black plastic line that passes through the firewall with the AC fittings going to the evaporator, through the foam gasket. The Radio may be grounded through the antenna so if the antenna lead is burnt off it may not ground as well as no radio signal.

 

Alot of people overlook the IOD fuse in the left dash fuse box. It's usually inside a yellow holder, top left I beleive.

 

Thanks gorms. You were right about the IOD fuse. What does IOD stand for? We are still trying to find what is left of the vacuum line.

 

IOD = Ignition Off Draw

Vacuum line passes though the firewall in the turbo area.

 

The factory vacuum line is hard enough you could just get another piece and stuff it through at the fittings then splice it in under the dash to the existing black line.