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Rear brake lights are not working - CLK Mercedes-Benz Cars & Trucks

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  • Anonymous Dec 29, 2008

    I was trying to change the fuse but don't know which fuse is for the brake light, I don't have the manual and ani info on the panel is gone

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Hi,

There are a couple of probable reasons why the brake light are not working, they are:

  • brake switch - underneath the dash. It is activated when the brake pedal is pushed. It is a spring loaded switch and is normally off. If the sprin is defective/missing then the switch will not activate;
  • brake light fuse;
  • bulbs;
  • corroded bulb socket - most brake lights are integrated with the rear park lights. The bulb socket would have 2 contacts, try checking if they are clean and reaches the mate in the end of the bulb;
  • wrong installation - the bayonet socket of most park/brake lights combo are offset, there is a right and wrong way if installing it into the bulb socket;
  • loose wire - it would be required to trace the brake wire to where it joins the rear harness;
  • loose ground - same as above or a workaround is to wire an additional ground wire from the housing of the bulb socket to any screw that is connected to the body ground.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 29, 2008

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  • 623 Answers

Check if the bulb is working,if its good to go,check the fuse

Posted on Jul 29, 2008

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