Relay

Decode the P0480 Fan 1 Control Circuit code without guesswork. Identify symptoms, safely test wiring and relays, and avoid costly replacements. Master step-by-step diagnostics to fix your cooling system and prevent engine overheating.

Learn how to tell whether a blower motor fuse or relay is bad, test both safely, and distinguish relay faults from resistor, motor, connector, and wiring problems.