RAM 2500 Van V8-5.2L VIN Y (1998)
Blower Motor Switch: Description and Operation
SYSTEM OPERATION
Front
The front blower motor is controlled by a four position rotary-type blower motor switch, mounted in the heater-only or heater-A/C control
panel. The switch allows the selection of one of four blower motor speeds, but can only be turned off by selecting the Off position with the
heater-A/C mode control switch knob.
The blower motor switch directs the blower motor ground path from the mode control switch to the blower motor resistor, or directly to ground
through the high speed blower motor relay, as required to achieve the selected blower motor speed.
The front blower motor switch cannot be repaired and, if faulty or damaged, the entire heater-only or heater-A/C control unit must be replaced.
The blower motor switch knob is serviced separately
Rear
The optional rear heater-A/C unit blower motor is controlled by a four position rotary-type blower motor switch, mounted in the accessory
switch plate located to the right of the heater-A/C control on the instrument panel. The switch allows the selection of one of three blower motor
speeds and an Off position.
The rear blower motor switch directs the blower motor ground path to the blower motor resistor, or directly to ground through the high speed
blower motor relay as required to achieve the selected blower motor speed.
The rear blower motor switch cannot be repaired and, if faulty or damaged, it must be replaced. The rear blower motor switch knob is serviced
separately The rear blower motor switch also has a replaceable incandescent-type illumination lamp bulb.
