Auto Headlight not working after replacing the turn signal switch?

2008 CADILLAC STS
160,000 MILES • 3.6L • V6 • 4WD • AUTOMATIC
Avatar
CANDO1
  • MEMBER
  • 47 POSTS
My high beams were stuck on unless the left turn signal is on, so I put on a new turn signal switch. no more constant High Beams, however the auto lights I think are not working. When the old switch was on auto the icon would light up and the body lights with headlights would be on. I'm wondering, did I get a bad switch?
May 5, 2023 at 6:38 PM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
You could have a bad switch or the wrong switch, here is the correct part number for the switch and instructions on how to change it correctly.

Turn Signal Switch : 20808029 $107.04

Can I ask if the switch is aftermarket? Check out the images (below). Please let us know what happens.
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 6, 2023 at 11:44 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.