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2008 cayenne turbo wont start only Porsche logo on dash

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Dear all


 my cayenne wont start when i turn the key on ON position the dash logo well appear and i can use the radio 


pushing the brakes to start the car and turning the key nothing


looking forward to hear from you

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  • 3 weeks later...

There can be two supplies if you have a battery under the spare wheel but if you have only one battery it splits off to supply the electrics and the starting circuit. Follow the + line under the seat  and you will find fuses and the line to the power relay. Check where the power stops, could be a fuse or a starting relay problem.

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 Thanks Red and Rick!  great info and definitely gives me a couple of leads to follow!  Got my fingers crossed that it’s the starter relay .  In my 06 CTTS it is under the cover between the brake fluid reservoir and the windshield. 

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pull the door trim and left up the drivers carpet


you well see bunch of wires going to the fuse box some of the wires are joint by the factory 

there known to rust .

if bad wires joint found connect them back together 


keep us posted 


some videos in YouTube for cayennes and touareqs should be helpful too

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 I started pulling fuses around the starter relay under the hood and the car came back to life .  Not sure exactly which fuse was the problem but none of them were blown.  It’s like it just went to sleep and then woke up . 

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