Daytime Running Light (DRL) System

Headlight does not light when lighting switch is in OFF position and engine is running.
- Lighting switch faulty, then see DAYTIME RUNNING LIGHT (DRL) CIRCUIT in COMPONENT TESTING.
- Parking brake switch faulty, then see INSTRUMENT PANEL .
- Generator faulty, then see GENERATORS & REGULATORS article in CHARGING SYSTEMS.
- DRL controller faulty, then see DAYTIME RUNNING LIGHT (DRL) CIRCUIT in COMPONENT TESTING.
- Wiring or grounding faulty, then see HEADLIGHTS in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
Headlight lights even if parking brake applied when light switch is in OFF position and engine is running. See
1. Parking brake switch faulty, then see BRAKE WARNING INDICATOR in COMPONENT TESTS.
2. DRL controller faulty, then see DAYTIME RUNNING LIGHT (DRL) CIRCUIT in COMPONENT TESTING.
3. Wiring or grounding faulty, then see HEADLIGHTS in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
Headlight lights even if engine stop and lighting switch is OFF position.
- Generator faulty, then see GENERATORS & REGULATORS article in CHARGING SYSTEMS.
- DRL controller faulty, then see DAYTIME RUNNING LIGHT (DRL) CIRCUIT in COMPONENT TESTING.
- Wiring or grounding faulty, then see HEADLIGHTS in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
Headlight Lights at low beam even if lighting switch is in HIGH BEAM position.
- Lighting switch faulty, then see HEADLIGHTS in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
- DRL controller faulty, then see DAYTIME RUNNING LIGHT (DRL) CIRCUIT in COMPONENT TESTING.
- Wiring or grounding faulty, then see HEADLIGHTS in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.