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HID headlights not working

Tiny
BUMA
  • MEMBER
  • 2009 CADILLAC CTS
  • 3.6L
  • V6
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Headlights will not come on in either "auto" or "on" positions. Ambient light sensor is functional as instrument lamps dim/brighten as appropriate. Instrument panel headlight indicator is functional. Stack switch is functional. Relay?
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Friday, December 7th, 2018 AT 7:13 AM

1 Reply

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.

Did you test the headlamp control module? It is located in the engine compartment, near the front right side under the under hood fuse block. I have attached a tutorial for you to view. Hope this helps and thanks for using 2CarPros.

Danny-

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

https://www.2carpros.com/articles/how-to-check-wiring
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Friday, December 7th, 2018 AT 6:56 PM

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