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Trunk lock cylinder rehab or swap.

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Old 01-15-2009, 07:13 AM
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Default That is a very simple circuit, so it should be easy to troubleshoot.
I use that button all the time. Like Dave said, the ignition has to be on for it to work. I rewired mine with constant power because that was pissing me off. It is much more usable now. It should also be noted that if you trunk is in valet mode (key in trunk turned 90 degrees clockwise) the red button also will not work.

Troubleshooting should be easy, it is an "ignition on" powered circuit with a momentary contact switch that activates a single actuator. It is not tied into the central locking system at all. I am not sure which fuse runs it. I would check your trunk lock "status" and make sure you are using it with the ignition on.
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Old 01-15-2009, 10:30 AM
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On my '97 S6, it is always live.
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Old 01-15-2009, 10:31 AM
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Pressed print to the color laser printer at work...many thanks.
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Old 01-15-2009, 10:35 AM
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could this work in door locks too?
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Old 01-15-2009, 10:39 AM
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Default Maybe, I have never taken one apart, BUT I have a spare and will look into it.
C H R O N I C B O R E D O M ; )
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Old 01-15-2009, 10:51 AM
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The button does more than unlock - right ? It also opens the trunk ?
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Old 01-15-2009, 11:19 AM
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Default Yes. It "pops" the trunk. Actually I do not know if it will pop it if it is locked. Never tried.
I know that it won't if it is in valet mode. But never tried it when just locked.
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Old 01-15-2009, 11:16 PM
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Default Well that's the not so simple to troubleshoot part
Electrically it's fine. But something fails in the part that makes it pop open. It seems to be a common failure.
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Old 12-31-2009, 03:25 PM
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wow! what a great guide, it told me everything i needed to know. My trunk hadn't worked on my audi since the day i bought it (obviously not brand new ). I had no idea where to even start, I thought i would need to buy a new trunk lock. But thanks to your guide my trunk is working again!
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Old 01-01-2010, 08:23 AM
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Wow. Great write up!
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