2002 E46 316ti - rear 3rd brake light not working

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  1. 2002 E46 316ti - rear 3rd brake light not working 
    #1
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    stevemc's Car Details
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    Hi all,
    need a little help, bought a 52 plate compact about 3 months ago
    all good love the car.
    problem i have is the 3rd brake light will not work.
    put 12 vaults to the light by it's self, works fine
    not to sure which fuse it is or rely or anything else to check
    need a good starting point (hoping it's not a big job)

    please help!
    thanks.
     
     

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    #2
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    nick316ti's Car Details
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    check the wiring where it comes into the tailgate could be a broken wire ........

    Alpine white
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    when you say you've applied 12volts to the light its self do you mean the bulb or to the actual fitting, my hunch is there is a fault in one of the cables to the holder, is the bulb fitting correctly in the holder is the bulb holder making contact with the housing of the light unit,try a new bulb.the fuse will be the same as your brakelights if they are working it wont be a fuse.
    Brakelights dont have relays so it wont be that either.
    There's an alternative. There's always a third way, and it's not a combination of the other two ways. It's a different way

    I see you've made you're decision now lets see you enforce it.

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    Hi,yeah we put 12v to the bulb holder.
    had a look at the wires seem fine, think they go to a little black box in the n,s,r roof area.
    also got some guy to look at it charged me £20 and said your fixed,, great.
    nope he had run a wire down to my rear light. ok when no lights are on but at night with lights on the 3rd brake light is on.
    so removed his wire and now back to normal with 3rd light not working.
    thanks steve.
     
     

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    sounds like you have a break in the loom somewhere,what you could do is run a cable from the 3rd brake light lamp holder to the brakelight switch,not ideal but a get you out of jail card untill you can sort it properley,or just make do with that fix.
    There's an alternative. There's always a third way, and it's not a combination of the other two ways. It's a different way

    I see you've made you're decision now lets see you enforce it.

    The search facility on here is your friend

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    #6
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    just another suggestion if you have a cut in the loom wiring you could run a new live and earth to one of the rear lamps and take your feed from the brake light and it will apply itself when ever the brake lights are put on job done hope that helps
     
     

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    #7
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    Quote Originally Posted by d9n_dk View Post
    just another suggestion if you have a cut in the loom wiring you could run a new live and earth to one of the rear lamps and take your feed from the brake light and it will apply itself when ever the brake lights are put on job done hope that helps

    sorry i should have read all the comments before posting ive just read after that you had someone run new wires to the rear lamps it sounds like he tapped off the sidelight feed you need a testlight or a multimeter to find the brake light feed.
    a way you could possible do this is if you can get hold of a test light with all lights off engine running get someone to apply the brakes,make sure your tester is earthed out and prob cables and wait for a feed tap off that wire sorry its a bit complicated but its hard to word it hopw this helps
     
     

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