Blower Motor Relay: Description and Operation
BLOWER MOTOR RELAYThe blower motor relay is a International Standards Organization (ISO) -type relay. The relay is a electromechanical device that switches battery current to the blower motor.
When the blower motor switch is in any position except OFF; and the ignition is turned on, the blower motor relay is energized and provides battery feed to the blower motor from a fuse in the fuse block module through the blower motor resistor.
The blower motor relay coil is controlled by a voltage signal from the blower motor switch.
The blower motor relay is installed in a wire harness connector located near the passenger side outboard end of the heater-A/C housing in the passenger compartment, next to the heater-A/C wire harness connector.
The blower motor relay cannot be repaired and, if faulty or damaged, it must be replaced.