I keep reading about that resistor pack.. Fact is if the fan does not work AT ALL, it is NOT, and I can prove it NOT the resistor pack.
Why do I say this.. One of the wires on the resistor pack has two leads hooked to it. .This is the HIGH speed. one is "HIGH" and the other is the motor.. So HIGH will work even if the pack is bad.
On GM designed systems there are also 2 relays Low speed and High Speed, I have no clue where. And the switch itself (Had one of those fail on a car)
And there is the ever loveing FUSE. which on my coach was NOT the fuse labeled for the HEVAC but another one entierly.. With some help from OMEY's web site and the diagrams there I found the HEVAC is supposed to connect to the accessory convience terminal which on my coach is near the parking brake.. The terminal for the HEVAC was, however, vacant (power to it but no wire on it) Thankfully Damon or Workhorse, NOT SURE WHICH has a habbit of printing the function ON THE WIRE,, So there was a yellow wire that said HEVAC or AIR Conditioenr (Forget which) plugged into a DIFFERENT terminal on that same board.. This lead me to a circuit breaker,, An new breaker to replace the broken one and AHH.. (At the time (August) HEAT was not want I wanted but man did that COOL feel nice)
Home is where I park it!