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Brake lights work only when park and headlights are off


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Ok so don't know what pattern the brake like has maybe one bulb for park and then both bulbs light when brake is pressed or both light are always on and get brighter when brakes are pressed..in any case with park lights and headlights off when i press the brake all 4 brake bulbs in the rear light up and for hazard as well but when park lights on or headlights all 4 lights in the rear just stay on ..no changes to them when i press the brake or turn signal or hazard all 4 bulbs are new any ideas why its doing that?

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the rear bulbs are all double filament (except for the backup light of course).  one filament is parking lights, one is for brake lights.  as hippie said, you'll want to verify that all are the correct bulb.  :thumbsup:

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Verify bulbs are correct and in the sockets the right way.

Check grounds.

  

the rear bulbs are all double filament (except for the backup light of course).  one filament is parking lights, one is for brake lights.  as hippie said, you'll want to verify that all are the correct bulb.  :thumbsup:

  

Hi Newton,

 

Check the ground connection for the rear lights.

 

If the ground is defective, the electricity will try to "double back" through the second filament.

 

Good luck!

 

Gene

Thanks for the reply guys

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