Lazerwolf
Well-Known Member
Electrical is far from my expertise and can't figure this one out. Took the 74 Charger for a test drive and noticed the blower fan was not working. It was last fall. Quick check found the number 7 fuse blown, which says it's for the heater/AC blower motor. The car originally had AC but is not hooked up under hood. Replacing the fuse resolved only part. What I found was the fan does not work when the temperature control is on defrost. However, it works fine on vent, heat, AC and max AC. Checking some schematics I found on here, I don't see anything specific for a defroster fan circuit or relay. I'm guessing whatever shorted out took out the fuse too, but clueless what it could be. On all the other setting, all three fan speeds work. The switch works, the temperature control works, the vacuum works and the resistor work. What am I missing?
