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one rear brake light out

paulm1964paulm1964 Member Posts: 1
edited November 2019 in Buick
one brake light out. replaced bulb and checked signal bulb holder both are ok? Any ideas what is next?


  • imidazol97imidazol97 Member Posts: 27,146
    edited November 2019
    Does the bulb flash if the 4-way emergency flasher lights are operating?
    With the turn signal flashing?

    You need to use a voltmeter to test the contact for the bulb to the ground side and see if there's voltage. Then if not, check to be sure there's voltage to a known good metal ground on the body.

    I've seen connectors in the lines for parking lights and turn signals on the front that are exposed to the elements that have connection problems within the connector that's close to the light housing. But brakes are usually inside the vehicle in the trunk. So go to the connector lines if you're not getting appropriate readings on the bulb contacts when the brake light should be on or turn signal is on if it's the same bulb.

    I'm not clear what you mean by signal bulb holder. Are the brake bulb and signal bulb the same in this case?

    Good luck.

    2014 Malibu 2LT, 2015 Cruze 2LT,

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