Cooling System: Description and Operation
FansHow the Circuit Works
Battery voltage is provided at all times to the radiator fan relay contacts through fuse 11 (under-hood fuse/relay box) and to the A/C condenser fan relay contacts through fuse 9 (under-hood fuse/relay box). With the ignition switch in ON (II), battery voltage is provided to the coils of the relays through fuse 30 (under-dash fuse/relay box).
Both relay coils are grounded by either the radiator fan switch or by the ECM/PCM. Grounding the relays energizes their coils, which applies battery voltage to the radiator and A/C condenser fan motors. The fans will run until ground is removed from the relay coils.