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Re: 2004 freightliner m-2 blower motor
Posted to HD/Fleet Forum on 1/9/2010 5 Replies

The electrical system is multiplexed but the BHM (and J1939) has nothing to do with the blower motor circuit. For some reason, Freightliner made the blower circuit independent of the main elctrical system on the truck.

The HVAC control head sends a 2kHz PWM ... Login to read more.

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