A4 (B6 Platform) Discussion Discussion forum for the B6 Audi A4 produced from 2002-2005

Battery Draining Brake Lights...???

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Old 12-11-2005, 06:18 AM
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Default Battery Draining Brake Lights...???

Good morning. I have a 2004 A4 1.8T Quattro with a strange problem. Several times over the past week I've walked in to the garage and found the brake lights on! Twice now it has drained the battery overnight. Any ideas on what to check? I'm puzzled... Thanks!
Old 12-11-2005, 06:23 AM
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bad fuse?
Old 12-11-2005, 07:19 AM
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Default Check brake light switch at pedal, also the "central electric control module" may be defective.

Scan module 9 for fault codes.
Old 12-11-2005, 07:49 AM
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It's a known issue with Audi and they will need to replace the brake swtich assembly
Old 01-24-2006, 06:19 AM
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Default Re: Check brake light switch at pedal, also the "central electric control module" may be defective.

Yes, sounds exactly like a brake light switch. It may also have a fault in the ABS (03) module. Very unlikely the control module is bad.
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