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Home >> Lincoln >> 2004 >> Aviator AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Information Gauges And Warning Devices >> Diagnosis And Testing >> Horn >> Symptom Chart

Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
  • No communication with the vehicle security module.
  • Circuitry.
  • Vehicle security module.
  • The horn is inoperative
  • Circuitry.
  • Horn relay.
  • Horn switch.
  • Horn.
  • The horn is always on
  • Circuitry.
  • Clockspring.
  • Horn relay.
  • Horn switch.
  • Vehicle security module.
  • Tire pressure monitoring system (TPMS) module.
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