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2008 997 TT cruise control inoperative

Dennis C

Recommended Posts

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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  • 2 weeks later...

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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  • 2 months later...

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