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Thread: Help!! None of my lights on the back of my car work at night!!

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    Help!! None of my lights on the back of my car work at night!!

    Just got this car 3 months ago, 2018 CX-9 Grand Touring. I did swap the license plate bulb and that was it. On my way home tonight i got pulled over by the cops and they told me none of my lights on the back end of my vehicle work, but the break light does work.

  2. #2
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    Check your fuses?

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    Make sure you have turned on the lights and are not just driving with daytime running lights.

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    Quote Originally Posted by Silly Wabbit View Post
    Check your fuses?
    Is it the fuse in the car or under the hood?

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    Quote Originally Posted by Midnight Rider View Post
    Make sure you have turned on the lights and are not just driving with daytime running lights.
    It was on auto, I then adjusted them with the cop helping me. I think it's def a fuse

  6. #6
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    Fuses don't just fail. Fuses blow to protect the wiring from overheating when there is a fault in the wiring. You need to find the defect and fix that, then drive happily with good wiring and a new fuse.

  7. #7
    ZOOOOOOOOOM ZOOOOOOOOOOOM mazdadude's Avatar

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    Quote Originally Posted by ninja729 View Post
    Just got this car 3 months ago, 2018 CX-9 Grand Touring. I did swap the license plate bulb and that was it. On my way home tonight i got pulled over by the cops and they told me none of my lights on the back end of my vehicle work, but the break light does work.
    You mention swapping bulb, are you saying that you swapped out the incandescent license plate bulb for LED?
    Mazda's I have owned over the years. (boom07)
    80' Mazda GLC SPORT MT - sold
    81' Mazda 626 DX MT - sold
    81' Mazda 626 LX AT - sold
    82' Mazda 626 DX MT - sold
    82' Mazda 626 LX AT - sold
    85' Mazda 626 LX MT - sold
    87' Mazda 626 GT Turbo MT - sold
    85' Mazda RX-7 GSL-SE MT- sold
    87' Mazda RX-7 Turbo 2 MT - sold
    91' Mazda Protege LX MT - sold
    92' Mazda MX-5 Miata MT - sold
    93' Mazda MX-3 GS-V6 Special Edition MT - sold
    00' Mazda 626 LX-V6 MT - sold
    02.5' Mazda Protege5 MT - sold
    92' Mazda MX-5 Miata MT - sold
    06' Mazda 5 Touring AT - sold
    13' Mazda CX-5 Touring AT - sold
    14' Mazda 3i Grand Touring MT - sold
    15' Mazda CX-5 Touring AWD AT - sold
    03' Mazda Protege5 AT - sold
    16.5' Mazda CX-5 Touring AWD AT - current
    09' Mazda Mazdaspeed3 GT - current

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    Quote Originally Posted by mazdadude View Post
    You mention swapping bulb, are you saying that you swapped out the incandescent license plate bulb for LED?
    yes

  9. #9
    Registered Member Atxyde's Avatar

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    Quote Originally Posted by ninja729 View Post
    yes
    It is possible for a bad led bulb to short and blow a fuse.

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    Quote Originally Posted by Atxyde View Post
    It is possible for a bad led bulb to short and blow a fuse.
    Dang it ok. Any idea what tail light bulb will work and won't blow the fuse

  11. #11
    ZOOOOOOOOOM ZOOOOOOOOOOOM mazdadude's Avatar

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    Quote Originally Posted by ninja729 View Post
    Dang it ok. Any idea what tail light bulb will work and won't blow the fuse
    You said license light previously, now are mentioning the tail lights, what bulbs were replaced and exchanged by you?

    If it were me, I would put the original bulbs back in that you took out, and see if that fixes your problem.

    Hopefully you just blew a fuse and not the Body Control Module.
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    Quote Originally Posted by mazdadude View Post
    You said license light previously, now are mentioning the tail lights, what bulbs were replaced and exchanged by you?

    If it were me, I would put the original bulbs back in that you took out, and see if that fixes your problem.

    Hopefully you just blew a fuse and not the Body Control Module.
    sorry I mean license plate bulb not the tail lights, having a pretty bad case of the flu over here so no fun at all this whole weekend lol

  13. #13
    Grand Poobah tex2670's Avatar

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    Quote Originally Posted by ninja729 View Post
    Is it the fuse in the car or under the hood?
    What's your manual say?

  14. #14
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    Fixed it, replaced both license plate bulbs with new Philips LEDs and all the lights in the back end of my car work again at night.

  15. #15
    Registered Member Atxyde's Avatar

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    Quote Originally Posted by ninja729 View Post
    Fixed it, replaced both license plate bulbs with new Philips LEDs and all the lights in the back end of my car work again at night.
    Great!

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