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International Automotive Technicians Network
Re: Mack Vision Fan Clutch
Posted to HD/Fleet Forum on 5/20/2010

I don't have specific knowledge on this system but here is some ideas to diagnose it.

Check for voltage at the clutch plug disconnected, if you have voltage, plug it back in and read the voltage drop across the clutch. If you have the same voltage you read w... Login to read more.