Blower Motor Switch Resistor

BLOWER MOTOR SWITCH RESISTOR
The heater blower motor switch resistor assembly operates in the following manner:
^ The assembly is located in the engine compartment on the A/C evaporator core housing.
^ Three resistance elements are mounted on the resistor board to provide four A/C blower motor speeds.
^ Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor ground circuit to decrease or increase A/C blower motor speed.
^ An overheating protective device (thermal limiter) prevents heat damage to the A/C evaporator core housing.
^ Overheating of the resistor coils can occur when the system airflow is stopped or reduced as a result of the A/C blower wheel becoming locked or unable to turn freely.