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Dennis C

2008 997 TT cruise control inoperative

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Hello everyone. My cruise control is not working on my 997 TT and I'm hoping it's something simple. The car is under warranty and I'll take it to my dealer if necessary, but I want to make sure I'm not missing an easy repair before I do that.

The green light in the instrument cluster will not illuminate when I attempt to active cruise control. I do have Depo LED tail lights installed, and they work perfectly without any error messages. I've read about LED tail lights causing problems with cruise control so I reinstalled my factory tail lights to see if that would change things. It didn't.  

I've checked the fuse box and there isn't a fuse specifically dedicated to cruise control. One obvious candidate to me was the fuse for the brake light switch (fuse C4), but that fuse was fine. I also checked fuse B3 based on a search on these forums, and it was also fine.  

I would greatly appreciate any suggestions.

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It's still inoperative, but I noticed that the green light in the instrument cluster does illuminate at start up.  I'm beginning to wonder if this is an issue with the control stalk...


I think a trip to the dealer is in order now.

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You have probably sorted this now but I once had a cruise play up in a BMW because of a corroded brakelight bulb! Obvious when I found it, but a hell of a thing to try to faultfind! Problem was, although one holder was corroded both brakelights were working fine!

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I haven't sorted it yet. I've checked the brake lights and that's not the issue. I did speak with my dealer and they are going to take a look when the car goes in for service.

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I did finally get the car into the shop for the cruise control issue.  It was a software issue that required some reprogramming by the dealer.  Everything is fine now.

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