Blower Motor Relay: Description and Operation

DESCRIPTION





The blower motor relay (1) for the heating-A/C system is an International Standards Organization (ISO)-type relay. Relays conforming to the ISO specifications have common physical dimensions, current capacities, terminal functions and patterns (2). The blower motor relay is a electromechanical device that switches battery current through a fuse in the power distribution center (PDC) directly to the blower motor when equipped with the manual temperature control (MTC) system, or to the blower motor power module when equipped with the automatic temperature control (ATC) system. The blower motor relay is energized when the relay coil is provided battery current by the ignition switch.

The blower motor relay is located in the power distribution center inside the engine compartment.