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FUSE BLOWN (1) Verify condition of battery terminals and volt- age, refer to Group 8A, Battery. If battery connec- (2) Using a voltmeter, test for battery voltage at both sides of horn fuse 8. If voltage is OK, on both (3) Using a suitable ammeter in place of the fuse, test amperage draw of the horn circuit. If amperage (4) Remove the horn relay from the Junction Block. If the amperage draw drops to 0 amps, the (5) Disconnect both horns. If amperage does not drop with both horns disconnected and the horn (6) Disconnect the wire connector from one of the horns. If amperage drops and the connected horn (7) Using a continuity tester, with the horns dis- connected test continuity of the X2 cavity of the horn FUSE OK (1) Remove the horn relay from the Junction Block. (2) Using a continuity tester, Depress horn switch and test continuity from the X3 cavity of the horn relay to ground. Refer to Group 8W, Wiring Diagrams (a) If continuity is detected, go to Step 3. (3) Using a suitable jumper wire, jump across the fuse F62 cavity and the X2 cavity of the horn relay in (a) If the horn sounds, replace the horn relay. (4) Remove airbag/horn pad from steering wheel. Refer to Group 8M, Restraint Systems for proper pro- (5) Test continuity across horn switch connectors with horn switch depressed. (a) If continuity is detected, repair open circuit between the relay and the horn switch. (b) If NO continuity, replace airbag cover. (6) Install horn relay into Junction Block. a voltmeter, with the horn switch depressed test voltage across horn connector termi- (a) If voltage is detected, replace horns. (9) With the horn switch depressed, test for volt- age between the X2 circuit and ground. (a) If voltage OK, repair system ground at right cowl area. Refer to Group 8W, Wiring Diagrams. (b) If NO voltage, repair open X2 circuit between the relay and the horns. SYSTEM TEST CAUTION: Continuous sounding of horns will cause horn relay to fail. Check fuse 8 in the Junction Block, and refer to Horn System Test table. Refer to Group 8W, Wiring Diagrams for circuit and wiring information. JX HORN SYSTEMS 8G - 3 DIAGNOSIS AND TESTING (Continued) |