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Courtesy of AMERICAN HONDA MOTOR CO., INC. RADIATOR FAN SWITCH CIRCUIT TROUBLE SHOOTING (OPEN) 1. Disconnect the radiator fan switch 2-pin connector. Turn the ignition switch ON. Measure voltage between radiator fan switch 2-pin connector, terminal No. 2 and body ground. See Fig. 4 . If there is 2. Turn the ignition switch OFF, and check for continuity between radiator fan switch 2-pin connector, terminal No. 1 and body ground. See Fig. 4 . If there is continuity, replace the radiator fan switch. See RADIATOR FAN SWITCH CIRCUIT TROUBLE SHOOTING (SHORT) 1. Remove the radiator fan relay from the under-hood fuse/relay box, and test it. See FAN RELAYS under COMPONENT TESTS. If the relay is OK, go to next step. If the relay is not OK, replace the radiator fan 2. Remove the radiator fan switch, and test it. See RADIATOR FAN SWITCH under COMPONENT TESTS. If the radiator fan switch is OK, go to next step. If the radiator fan switch is not OK, replace the 3. Disconnect the under-hood fuse relay box 20-pin connector. Check for continuity between radiator fan switch 2-pin connector, terminal No. 2 and. body ground. See Fig. 4 . If there is continuity, repair short in COMPONENT TESTS FAN MOTOR Disconnect appropriate fan motor connector. Apply battery voltage and ground between fan motor terminals. If FAN RELAYS 1. Although physical appearance of relays may be different, basic relay operation is similar. Remove relay to be tested. Check continuity between relay terminals No. 1 and 3. See WIRING DIAGRAMS . 2. Apply battery voltage between terminals No. 2 and 4. Continuity should exist between terminals No. 1 and 3. If continuity is not as specified, replace relay. RADIATOR FAN SWITCH 1. Remove the radiator fan switch from the radiator. Suspend the radiator fan switch in a container of water.
2004 Acura TSX 2004 ENGINE COOLING Electric Cooling Fans - TSX
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