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Thread: Both brake lights out. Where to check first?

  1. #1
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    Both brake lights out. Where to check first?

    It's highly unlikely that both bulbs blew out simultaneously so What do they have in common?

  2. #2
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
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    Is the 3rd brake light coming on?

    And you replaced both bulbs and they are not working?

    Yes it is possible for both to burn out at once, while not very likely.
    Darin
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  3. #3
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    Start with the bulbs where else would you start, then connector wiring

  4. #4
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    OK. Here's an update.

    The lights are all illuminating. No problem with them. Still, the dashboard indicator shows bulbs out on both sides. Jeez. Now it's getting tricky. Could there be a problem with my brake light switch?

    Thanks for taking the time to consider this puzzle.
    Paul

  5. #5
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    Clean and tighten up brake light sockets.
    Do you have any aftermarket additions to the car in the lights department?

  6. #6
    dworthy's Avatar
    dworthy is offline Wagon meister :) BMW Tech Expert
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    +1

    Cheap bulbs will do this, IIRC they have to be the tin/gray color bottoms. If you get ones with the bronze/copper looking contact, then those will throw the "bulb out" light on the dash.
    Darin
    Current:
    16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
    05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
    05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
    Past:
    95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
    84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
    91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
    82 528i euro Saphire Blue Met/Blue Leather RIP
    79 525 euro Green/Green RIP
    79 318 Silver/Black - The first one that got it all started
    M-Flight Member

  7. #7
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    OK. Great tip! I'll try some Osram brand bulbs or get some from the dealer.

  8. #8
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    No mods except the heat sink on the bulb holder to dissipate heat. I have had that mod working for years. I'll clean the contacts and get some good quality bulbs and report back.

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