I don't have an underhood fuse box, just the one in the dash. But the fuse labeled air fan and air dryer is good.
I've got the solenoid and I replaced it with no change. I'm going to add freon next to test the high pressure switch. It's driving me crazy!
When the engine is off and there is not air supply to the fan, the clutch disengages and I can spin it by hand.
Brain fart...I know what you're saying now. I will try that next. Thx.
Sorry,I meant, where do I find the high pressure switch?
Dumb question, how do I do that?
Reversed the air lines with no change.
I have a 1995 Mack CH613. My fan is running constantly. I have run electrical continuity tests, air tests, and replaced the fan clutch solenoid...