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Old 08-29-2008, 05:09 PM
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brake light fuse

Anyone know where I might find the fuse for the driver's side brake light?
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Old 08-29-2008, 06:27 PM
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It's in the owner's manual. And on the fuse boxes as well.
But it's not going to be just the left one; it's going to be both. And maybe the tails too. Later.
JC
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Old 08-29-2008, 06:42 PM
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Good call with the manual, I'll take a look there later. I didn't think they would put that information in the owners manual, but a service manual instead.

I remember someone told me the brake lights are individually fused. If they're not what could be causing the left light to go out when I apply the brake (stays lit otherwise). I put LEDs in all 6 lights in the rear
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Old 08-29-2008, 07:49 PM
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So that's the problem. I bet it's not going to be the fuse buddy; LEDs draw much less power than incandescent bulbs... unless something is shorted inside the built-in (miniature) module. Let's find out.

First order of business is to check your car's circuit with a multimeter. You're going to have 3 contacts: one is ground (the different color), one the tail, and the other the brake. If you have power when the brake is applied, the problem is your LED bulb. If no power, look for the fuse and replace it if burned, then install the stock bulb and try your brakes. They should work fine.

Then swap the left LED bulb with the right, and see what happens. Most likely the right light won't work this time. Let us know and we go from there, but that easy troubleshooting should isolate your problem. Keep us posted and good luck.
JC
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Old 08-29-2008, 07:51 PM
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its your bulbs, one light doesnt just go out and the other keeps working, if fuse is blown you wouldnt even be able to move out of park, its your bulbs
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Old 08-29-2008, 08:43 PM
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Quote:
Originally Posted by elp_jc View Post
So that's the problem. I bet it's not going to be the fuse buddy; LEDs draw much less power than incandescent bulbs... unless something is shorted inside the built-in (miniature) module. Let's find out.

First order of business is to check your car's circuit with a multimeter. You're going to have 3 contacts: one is ground (the different color), one the tail, and the other the brake. If you have power when the brake is applied, the problem is your LED bulb. If no power, look for the fuse and replace it if burned, then install the stock bulb and try your brakes. They should work fine.

Then swap the left LED bulb with the right, and see what happens. Most likely the right light won't work this time. Let us know and we go from there, but that easy troubleshooting should isolate your problem. Keep us posted and good luck.
JC
Yeah I haven't done any troubleshooting yet .. I wasn't home and I was thinking about it a little so I just made this thread from my blackberry.
I don't think the LED is the problem because it lights up as a tail light but not as a brake light. Tomorrow I'll go at it with a meter and locate/check fuse.
Thanks!

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Originally Posted by Gosha View Post
its your bulbs, one light doesnt just go out and the other keeps working, if fuse is blown you wouldnt even be able to move out of park, its your bulbs
6MT FTW but what does a blown brake light fuse have to do with the car coming out of park? You think the auto trans looks for current going through the brake light to determine whether or not the brake is applied?
I'd have to say that's not how it works because it's pretty poor engineering to to it that way.
One of my professors told me about a problem Audi had with their cruise control at one point .. they had the cruise control system look for current in the brake light and when it sensed it, it would turn cruise off .. but people with blown fuses or bulbs had no current flowing (brakes still worked, of course) so the cruise never turned off ... when they started the car the next time, it would immediately accelerate to whatever speed it was cursing at before.
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