Diesel Data: Automotive Repair

High Beam Headlamps Will Not Turn On

Test 1 - 4:




Test 5 - 10:




Test 11 - 13:




SYMPTOM
HIGH BEAM HEADLAMPS WILL NOT TURN ON

POSSIBLE CAUSES
- Open fused B(+)
- Relay ground open
- Fused Low Beam output CKT open
- Fused Low Beam relay output short to ground
- Switched High Beam Relay control circuit open
- Switched High Beam Relay control circuit shot to ground
- High Beam Relay output CKT open
- Multi-function switch
- HI beam relay
- High beam relay
- High beam relay