In one of mine with electric fans I run a relay as well the thermostat provides ground to the relay to turn on and off. I spliced into the thermostat wire and have wire running to switch that’s in cab. It grounded to dash. It can be flipped to provide ground to relay and turn fans on even when thermostat is not on.
Just check on your parts. I’ll bet that relay blew as well
Last edited by hcb3200; 05/12/2024 1:38 AM.
