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05 boxster s top issue?


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Just got boxster knowing top didn't work.,.makes no sounds no display message.., nothing. Checked windshield micro switch... Checks OK....relays check OK. Releasing top lever doesn't drop windows. Windows work with door switchs. Also checked fuses and top switch. Really stuck on this one. Any ideas appreciated.. Thanks

 

 

 

 

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You are likely going to need a Porsche specific diagnostic tool to find out what switch or motor is not working correctly.

Durametric software or a shop with a Porsche diagnostic tool (PIWIS) will shorten the diagnosis and repair - and much better than guess and replacing parts.

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There are two relays (one for opening and one for closing) and switches in each transmission.

Fuse E3 and the console switch. Additionally the the switch at the top center of the windshield (microswitch in locking hook).

And of course the control is through the Rear Control Unit.

 

So unless it is the fuse or an obvious broken switch your best bet is still a Porsche diagnostic tool.

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Thanks Loren, Relays checked ok as well as micro switch in latch. No power going to top motor but I can trip relay manually to open top. I agree with your statement seeking a scan to accurately diagnose issue. Just trying to eliminate simple things. There is power going to latch micro and even with jumping it no effect. Is there another controller above relay module that can affect this condition. I truly appreciate you taking the time to help.. Also, rear control unit..is this the one under driver seat?

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  • 2 weeks later...

Well, had to replace both transmission plastic gears and only one transmission had the micro switch. Replaced both relays, checked fuses, checked windshield micro-switch as well as console switch...all ok. Fuses also ok. All that is left is the control module underneath the driver seat. So..removed the seat and gained access to the module traces on the board and nothing out of the ordinary. I guess its time to visit the local dealership... Seems odd to me that everything that the module controls works fine except the windows don't drop and no power is getting to the top motor...thus the top doesn't work..

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  • 2 years later...

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