305_M@ck
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BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. The forums are not affiliated with Mack Trucks, Inc.
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I have 99 CH613 with the fan always on, no bad fuse.
in Electrical, Electronics and Lighting
Posted
check the connector that plugs into the valve and see if you have 12 volts and ground. if you don't have ground at the connector check the cable that comes from your ecu because the ecu send ground to the fan to turn it on and off.