Replace break light bulb.

2007 MERCURY MARQUIS
63,000 MILES • 4.1L • V8 • 2WD • AUTOMATIC
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HARRY DAY
  • MEMBER
  • 1 POST
Driver side break light is out.
Feb 10, 2016 at 6:49 PM
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HMAC300
  • CAR REPAIR CONTRIBUTOR
  • 48,601 POSTS
assuming you have checked the bulb check to see if you are getting power at the lt. grn /org wire if you are then it may be a bad socket or ground if no power see if it is coming from multi function switch on steering wheel.
Feb 11, 2016 at 6:28 AM
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