Initial Inspection and Diagnostic Overview

1. Verify the customer's concern by following these steps:
a. Turn ignition switch OFF.
b. Turn headlamp switch to HEAD.
c. Check low beam headlamp operation.
d. Refer to Headlamps to service headlamp concerns before checking daytime running lamps control.
e. Check daytime running lamps system operation:
- Turn ignition switch to RUN.
- Verify parking brake control is fully released.
- Check for low beam head lamps ON at reduced intensity.

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

VISUAL INSPECTION CHART

Electrical
- Open battery junction box fuse: Fuse 15 (15 A)
- Open central junction box fuse: Fuse 6 (15 A)
- Circuitry open/shorted.
- Damaged ignition switch.
- Damaged daytime running lamps control module.

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