I have a '91 trooper w/a strange problem.....
The air conditioner, fan, heater, vent, defroster - everything has
quit....worked fine one day - nothing the next.
It's been in the shop now for 2 days and the mechanic said he can find
nothing wrong except it doesn't work.
They've tried all the expected things - fuses, relays, etc. He is not an
Isuzu mechanic and doesn't have the wiring diagram though. Is there an
obvious place to try that we're missing? Any suggestions appreciated.