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Test D: Poor Horn Tone

  1. If horns diagnostic system check has been performed, go to next step. If horns diagnostic system check has not been performed, go to HORNS DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Press horn switch on steering wheel. If horns sound harsh or make buzzing noise, go to next step. If horns do not make any noise, repair by symptom. See SYMPTOM INDEX  table.
  3. Check torque of horn mounting and bracket fasteners. Fasteners should be torqued to 89 INCH lbs. (10 N.m). If no problem is found, go to next step. If problem is found, repair as necessary and go to step  7 .
  4. Disconnect horn assembly 2-pin harness connector. Horn assemblies are located on front bumper impact bar, below right and left headlights. Connect a fused (15-amp) jumper wire between positive battery terminal and horn assembly harness connector terminal "B" (Dark Green wire). Connect another jumper wire between negative battery terminal and horn connector terminal "A" (Black wire). If horns do not make any noise, go to next step. If horns sound harsh or make buzzing noise, go to step  6 .
  5. Repair high resistance in horn control or horn ground circuits. See WIRING DIAGRAMS  . After repairs are made, go to step  7 .
  6. Replace appropriate horn assembly. After repairs are made, go to next step.
  7. Operate horns. If horn operates normally, testing is complete. If horns do not operate normally, go to step  1 .
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