TomVertiz

So I rechecked the the ax pressure switch. That was the problem. I let another mechanic in out shop talk me into second guessing myself. Thanks for the advice!!

I am working on a 06 Mack with a cummins. The clutch fan will not go off. I have checked the ac pressure switch and I believe it is ok. The problem is I am only getting between 10 and 11.5 volts out of the Ecu, and the silonoide takes 12 volts to activate. The wire goes straight to the computer and not through a relay, there is also no corrosion or bad spots in the wire. I checked right out of the Ecu and there is not 12 volts. Any help would be appreciated.