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8D–119 WIRING SYSTEM Diagnosis Horn Do Not Sound Step Action Value(s) Yes No 1 Is the fuse F–2 normal? — Go to Step 2 Replace the fuse 2 Disconnect the alarm & relay control unit connector Is the battery voltage applied between harness side Approx. 12V Go to Step 4 Go to Step 3 3 Repair an open circuit between the fuse F–2 and the Is the action complete? — Verify repair — 4 Disconnect the horn switch connector. Is there continuity between harness side connector — Go to Step 6 Go to Step 5 5 Repair an open circuit between the alarm & relay Is the action complete? — Verify repair — 6 Press the horn switch. Is there continuity between switch side connector I–32 — Go to Step 7 Repair or replace the switch 7 1. Disconnect the horn connector. side connector terminal 1. Does the horn work? — Go to Step 8 Replace the horn 8 Is there continuity between harness side connector — Go to Step 9 Go to Step 10 9 Replace the alarm & relay control unit. Is the action complete? — Verify repair — 10 Repair an open circuit between the horn and the alarm Is the action complete? — Verify repair — Horn Do Not Stop Sounding Step Action Value(s) Yes No 1 Disconnect the horn switch connector I–32. Do the horn stop sounding? — Repair or replace the horn switch Go to Step 2 2 Disconnect the alarm & relay control unit connector Is there continuity between harness side connector — Repair short circuit Replace the alarm & relay control unit |