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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 139 (Exterior Lighting System - F150) >> Diagnosis And Testing >> Headlamps >> Symptom Chart

Symptom Chart

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART

Condition Possible Sources Action
  • One or both low beams are inoperative
  • Fuse
  • Bulb
  • Wiring, terminals or connectors
  • Body Control Module (BCM)
  • One or both high beams are inoperative
  • Fuse
  • Bulb
  • Wiring, terminals or connectors
  • Multifunction switch
  • Steering Column Control Module (SCCM)
  • BCM
  • The low beam(s) are always on
  • Wiring, terminals or connectors
  • Headlamp switch
  • SCCM
  • BCM
  • The high beam(s) are always on
  • Wiring, terminals or connectors
  • Multifunction switch
  • SCCM
  • BCM
  • The flash-to-pass feature is inoperative
  • Multifunction switch
  • SCCM