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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1551 (Horn System) >> Diagnostic Tests >> Horn >> Symptom Chart

Symptom Chart

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart

Condition Possible Sources Action
  • The horn is inoperative
  • Fuse
  • Wiring, terminals or connectors
  • Horn
  • Horn relay
  • Steering wheel switch harness
  • Clockspring
  • Horn switch (part of the driver air bag module)
  • The horn is always on
  • Wiring, terminals or connectors
  • Horn relay
  • Lighting control module (LCM)
  • Clockspring
  • Horn switch (part of the driver air bag module)
  • Steering wheel switch harness