Diesel Data: Automotive Repair

DRL Relay Circuit

DRL Relay Circuit

DESCRIPTION

When all of the following conditions are met, the daytime running light (dimmed high beam headlight) comes on.
- Ignition switch is in ON position.
- Engine is running.
- Low beam headlight is OFF
- Parking brake switch is OFF.

When both of the following conditions are met, the high beam headlight comes on.
- Low beam headlight is ON.
- Dimmer switch is in HIGH position.

Wiring Diagram (Part 1):




Wiring Diagram (Part 2):






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INSPECTION PROCEDURE