Diesel Data: Automotive Repair

High Beam Headlamps Will Not Turn On

Tests 1 - 4:




Tests 5 - 7:




SYMPTOM
HIGH BEAM HEADLAMPS WILL NOT TRN ON

POSSIBLE CAUSES
- Open fused B+
- Dimmer switch low beam output circuit short to ground
- Dimmer switch high beam output circuit short to ground
- Open fuse
- Dimmer switch low beam output circuit open
- Instrument cluster
- Multifunction switch