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Home >> Lincoln >> 2003 >> LS 3.0 S >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Information, Gauges And Warning Devices >> Diagnosis And Testing >> Horn >> Symptom Chart >> Notes

Symptom Chart: Notes

SYMPTOM CHART

Condition Possible Sources Action
No communication with the front electronic module (FEM)
  • Central junction box fuse(s):
    • 20 (10A).
    • 29 (5A).
    • 30 (5A).
    • 33 (10A).
  • Battery junction box (BJB) fuse 25 (40A).
  • Circuitry.
  • J1850 standard corporate protocol (SCP) communication network.
  • FEM.
 REFER to MODULE COMMUNICATIONS NETWORK to continue module communication diagnosis.
No communication with the instrument cluster module
  • Central junction box (CJB) fuse(s):
    • 4 (5A).
    • 13 (5A).
    • 17 (5A).
    • 20 (10A).
  • Circuitry.
  • J1850 standard corporate protocol (SCP) communication network.
  • Instrument cluster.
 REFER to INSTRUMENT CLUSTER  to continue module communication diagnosis.
The horn is inoperative
  • Underhood auxiliary junction box (AJB) fuse: 4 (20A).
  • Circuitry.
  • Horn relay.
  • Horn switch.
  • Horn.
  • Front electronic module (FEM).
  • Instrument cluster.
 Go To PINPOINT TEST AF .
The horn is always on
  • Instrument cluster.
  • Horn relay.
  • Circuitry.
  • Horn switch.
  • Front electronic module (FEM).
 Go To PINPOINT TEST AG .
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