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E46 Convertible
The E46 vert forum. Talk about dropping your E46 top here.

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Old 03-29-2014, 09:39 PM   #1
Kay D Boss
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Brake lights stay on!! Help please .

325ci

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Old 03-29-2014, 09:45 PM   #2
tcphoto
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Check the tail light grounds, I had the same thing. I redid the grounds and the warning light disappeared.
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Old 03-30-2014, 12:13 AM   #3
Kay D Boss
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Okay, Thanks.

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Old 03-31-2014, 09:43 PM   #4
Nickvjr
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Is this the same car you were having the radio and horn problems with?

If the brake lights turn on as soon as the ignition is on (engine running or not) then the brake module is in a default mode because of a K-Bus issue.

Replace your ignition switch! And when you do and it fixes your problem come back and let us know if it worked (or not).

Good luck!
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Old 04-01-2014, 11:14 AM   #5
Kay D Boss
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Yes this is the same car. I will replace the ignition switch. I will let you know. Thank you.

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Old 04-01-2014, 11:16 AM   #6
3coupe
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Might be a bad brake light switch or bad connection to the switch.

Last edited by 3coupe; 04-01-2014 at 11:17 AM.
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Old 04-01-2014, 11:38 AM   #7
Kay D Boss
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Well this my baby and I will replace everything if I have to. Very frustrating! !

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Old 04-01-2014, 11:42 AM   #8
straight_beamin
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Check the fuse for the brake light. Im going to guess and say fuse #9. Check the diagram chart in your glove box. I had the same problem i fixed it by replacing the blown fuse. That was 2 years ago...

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Old 04-01-2014, 11:45 AM   #9
straight_beamin
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It is fuse 9 just checked . If not you have a short or ground issue/ corroded connections. Try what I said first though. Never know

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Old 04-01-2014, 12:46 PM   #10
Kay D Boss
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Okay thanks

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Old 04-01-2014, 12:47 PM   #11
tonycajjo
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its gotta be the brake switch under the peddle. had the same problem in my x5, wasnt even a broken switch, just came unclipped.
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Old 04-01-2014, 01:18 PM   #12
Kay D Boss
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Okay cool

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Old 04-02-2014, 01:33 PM   #13
straight_beamin
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Any luck?

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Old 04-02-2014, 01:47 PM   #14
Kay D Boss
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Not yet, So far my options are ignition switch, brake switch, fuses, k bus and the spring coil in the steering wheel. My heated seats dont work nor does any of the controls on the steering wheel work including the horn. Just all at one time!! No indicator lights are on either. Insanity.

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Old 04-02-2014, 02:42 PM   #15
tonycajjo
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much more than brake lights then. make sure you check your voltage first and test the battery before you go replacing stuff.
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Old 04-02-2014, 03:19 PM   #16
Kay D Boss
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Okay I will . Thanks so much.

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Old 04-02-2014, 10:35 PM   #17
tcphoto
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I remember replacing the brake switch first and the problem persisted. The dealership tried to sell the high dollar diagnostic test but I read about the ground problem and fixed it myself. Just go out and pull the bulb carriers already.
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Old 04-03-2014, 09:45 AM   #18
Kay D Boss
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Okay I will check ground problems too. Thanks!!

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Old 04-08-2014, 06:08 PM   #19
Kay D Boss
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Ignition switch

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Old 04-08-2014, 06:10 PM   #20
Kay D Boss
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Everything works now. Thanks guys your awesome! ! 107$ and 30 minutes of my time. Something so simple caused major problems.

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