C 2500 Truck 2WD V8-379 6.2L DSL VIN J FI (1992)
Blower Motor: Description and Operation
Primary Heater System
The Blower Motor delivers air to the interior of the vehicle. Its speed is controlled by the Blower Switch and the Blower Resistors. When the Ignition
Switch is in RUN, battery voltage is supplied to the Blower Switch. With the Blower Switch in LO, voltage is supplied across both Blower Resistors and
the Blower Motor. The Blower Motor runs at its slowest speed. With the Blower Switch in MED, one of the Blower Resistors is bypassed and the
Blower Motor runs faster. When the Blower Switch is set to HI, battery voltage is supplied directly to the Blower Motor and the Blower Motor runs at its
fastest speed.
