Passport EX 2WD V6-3.2L SOHC (6VD1) (1997)
Blower Motor: Description and Operation
With the engine running, the alternator applies voltage to the heater-A/C relay. The heater-A/C relay energizes and allows battery voltage through fuse
EB-16 to the blower motor.
The fan control switch then applies ground to the blower resistor for the desired blower motor speed. Each time you turn the fan control switch to a
higher speed, another resistor in the blower resistor is bypassed. This increases the blower motor speed one step at a time. When the fan control switch is
in position 4, all of the resistors are bypassed and the blower motor runs at the highest speed.