Diesel Data: Automotive Repair

Radiator Cooling Fan Motor Relay: Testing and Inspection


1. Disconnect electrical connector and remove relay. Fan relay is located in left front of engine compartment above battery.
2. Connect ohmmeter between white/black and white/green wire terminals on relay.
3. Meter should indicate no continuity.
4. Connect battery voltage across white and white/blue wire terminals on relay.
5. With relay energized, ohmmeter should indicate continuity between white/black and white/green wire terminals.