What Causes Automatic Daytime Running Light Control Failure?

1 Answers
VanCalvin
07/30/25 1:47am
Automatic daytime running light switching failure may be due to settings issues, blown fuses, or potential vehicle wiring harness faults. Below is an introduction to troubleshooting methods for automatic daytime running light failures: 1. Handling setting faults: Turn off the daytime running lights in the vehicle settings. Simply rotate the headlight switch to the automatic position, and the automatic daytime running lights will turn the headlights on/off based on ambient light intensity. 2. Blown daytime running light fuse: When fuses blow, typically both sides won't illuminate, requiring fuse repair or replacement; if only one side fails, it's likely not a fuse issue. 3. Wiring harness fault: Inspect the wiring between the headlight control module and daytime running lights. If wiring issues are found, replace the wiring harness.
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