Check that the radiator fan rotates when battery voltage is applied between the terminals (as shown in the table below).
Check that abnormal noise is not produced while the motor is turning.
Remove the radiator fan motor relay (High and Low) from the relay box in the engine bay.
Check the continuity of the terminals "2" and "4" with an ohmmeter.
Item | Terminal No. | Yes or No |
ON | Terminal 1-3 | Continuity |
OFF | Terminal 1-3 | Non continuity |
Terminal 2-4 | Continuity |