Dodge Diesel - Diesel Truck Resource Forums

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- - Fan (https://www.dieseltruckresource.com/forums/24-valve-engine-drivetrain-89/fan-36714/)

Fenderstrat72

Jan 4, 2004 07:24 AM

Fan

I have an 2003 SO and was wondering what the cable hooked to the fan hub is for? What is it's purpose?

wannadiesel

Jan 4, 2004 08:17 AM

It allows the computer to engage and disengage the fan clutch. Fan engagement is based on engine temp, under hood temp, road speed/engine rpm (for increased fuel economy), exhaust brake operation (fan kicks in to help slow the truck) and A/C pressure (makes the A/C work better) on "big truck" applications. I don't know how many parameters the Dodge PCM looks at when controlling the fan.

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