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1999 Mercedes Benz ML430 brake lights

Tiny
PETE KLUMB
  • MEMBER
  • 1999 MERCEDES BENZ ML430
  • V8
  • AWD
  • AUTOMATIC
  • 120,000 MILES
2 out the the three brake lights do no work, only the 3rd (center) light works. I have checked the bulbs and fuses and found no problem?
Can you help? Is it a wiring problem or what?
Thanks,
Pete Klumb
Friday, July 17th, 2009 AT 5:34 PM

3 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Suspect faulty brake light switch, located on brake pedal arm below driver side dash
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Friday, July 17th, 2009 AT 5:36 PM
Tiny
PETE KLUMB
  • MEMBER
  • 2 POSTS
If the brake light switch is faulty (your answer) why does the center brake light work fine?
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Friday, July 17th, 2009 AT 6:45 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Because the high mount stop lamp runs on a separate circuit. It is ran through a relay, the main brake lamps run through the switch.
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Friday, July 17th, 2009 AT 9:27 PM

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