Radiator Cooling Fan Control Relay (Diamante)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Mitsubishi Outlander, 2003 Mitsubishi Montero Sport, 2003 Mitsubishi Montero, 2003 Mitsubishi Lancer, and 2003 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.
Remove radiator cooling fan relay. Check continuity between radiator cooling fan relay terminals No. 1 and 3. See Fig 1. Continuity should exist. Connect jumper wire between battery positive terminal and radiator cooling fan relay terminal No. 1. Connect second jumper wire between battery negative terminal and radiator cooling fan relay terminal No. 3. With relay energized, continuity should exist between terminals No. 4 and 5. With power source removed, continuity should not exist between terminals No. 4 and 5. If relay does not test as specified, replace radiator cooling fan relay.