Flow of Diagnosis

1. Verify the customer's concern by following these steps:
a. Turn ignition switch OFF.
b. Turn headlamp switch to HEAD position.
c. Check low beam headlamp operation.
d. Turn high beam headlamp ON with dimmer switch.
e. Check high beam operation.
f. Turn high beam headlamps OFF.
g. Turn low beam headlamps OFF.
h. Check high beam indicator located in instrument cluster for proper concern.
i. Check daytime running lamps system operation:
- Turn ignition switch to RUN.
- Check for high beam headlamps ON at reduced intensity.

2. Inspect to determine if one of the electrical concerns apply:

Electrical
- Open fuse junction panel Fuse 12 (20 A)(B), 5 (15 A).
- Power distribution box Fuse high beam headlamps (20 A).
- Damaged connectors.
- Circuitry open/shorted.
- Damaged ignition switch.
- Damaged daytime running lamps control.
- Damaged parking brake signal switch and bracket.

3. If the inspection reveals obvious concern(s) that can be readily identified, service as required.
4. If the concern(s) remains after the inspection, determine the symptom(s) and go to the Symptom Chart. Symptom Related Diagnostic Procedures