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Home >> Ford >> 2002 >> Crown Victoria Base, 4.6 9 >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Exterior Lighting System >> Diagnosis And Testing >> Headlamps >> Symptom Chart

Symptom Chart

SYMPTOM CHART

Condition Possible Sources Action
  • No communication with the lighting control module (LCM)
  • Central junction box (CJB) fuses:
    • 21 (15A).
    • 23 (15A).
  • Circuitry.
  • J1850 communication network.
  • Lighting control module (LCM).
  • No communication with the lighting control module-unable to enter self-test
  • CJB fuses:
    • 6 (15A).
    • 15 (15A).
  • Circuitry.
  • LCM.
  • Both headlamps are inoperative - high beams and low beams
  • Bulbs.
  • CJB fuse 27 (20A).
  • Circuitry.
  • Multifunction switch.
  • LCM.
  • The headlamps are on continuously
  • Circuitry.
  • LCM.
  • Headlamp switch.
  • The high beams are inoperative
  • Bulbs.
  • Circuitry.
  • Multifunction switch.
  • The low beams are inoperative
  • Bulbs.
  • Circuitry.
  • Headlamp switch.
  • Multifunction switch.
  • LCM.
  • The flash-to-pass feature is inoperative - the high beams are operative
  • Multifunction switch.
  • The high beams are inoperative - the flash-to-pass feature is operative
  • Multifunction switch.
  • One low beam headlamp is inoperative
  • Bulb.
  • Circuitry.
  • One high beam headlamp is inoperative
  • Bulb.
  • Circuitry
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