2006 Chevy Trailblazer Low Beam lights went out

2006 CHEVROLET TRAILBLAZER
30,000 MILES • 6 CYL • 4WD • AUTOMATIC
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PHILBO
  • MEMBER
  • 2 POSTS
Both low beam lights went out at the same time for now obvious reason. Fuses and relays have checked out okay and have replaced bulbs. Still no low beam lights. High beams and parking lights work just fine. Bad switch maybe?
Mar 13, 2010 at 3:56 PM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Hi philbo,

Thank you for the donation.

It could be a fault with the light switch, Body Control Module or the wiring circuit.

At the light switch, test the Yellow/black wire for battery voltage. If voltage is present, ground it and if low beams comes on, the light switch is bad.

If voltage is not available, unplug the BCM and apply voltage to the Pink/White wire ( terminal # A5) and if light comes on, the BCM is faulty.
Mar 15, 2010 at 10:45 AM
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