Condenser Fan: Description and Operation

How the Radiator and Condenser Fans Circuit Works

Voltage is provided at all times to the radiator fan relay contacts through fuse 4 and to the condenser fan relay contacts through fuse 1. With the ignition switch ON (II), voltage is provided to the coils of the relays through fuse 14 (in the under-dash fuse/relay box).

The relays are grounded by either the radiator fan switch or by the ECM/PCM. Grounding the relays energizes their coils and applies battery voltage to the radiator and condenser fan motors. Both fans then run until ground is removed from the relay coils.