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 Post subject: Porsche 928 Electrical woes
PostPosted: Wed Feb 24, 2010 12:09 pm 
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Joined: Sun May 31, 2009 4:59 pm
Posts: 924
Location: Bath, UK
TIPEC membership: 5406
Hi All, and especially Rav!

I have the following issues:

Drivers seat wont move backwards/forwards but does up and down

Electric windows - drivers window was working only, now both not working at all. I get nothing. I did have a bad rubber on the drivers side.

no 'tell tale' on dash for fog light - I am not even sure what should light up when fog lights on?

x1 rear fog not working. I have not checked bulb yet. So hope easy fix.

I have a seat motor and a window motor bought in case.

Gentlemen please throw your thoughts at me as I will start work as soon as she is back from having the brakes, CVs and wheel bearings done at the end of the week.

Thanks in advance!

Regards
Paul

_________________
1985 928 S2 Iris Blue
2006 A6 3.0 Quattro
2003 4.7 H.O Grand Cherokee

Gone but not forgotten:
1986 944 Lux
1988 944 Lux

Location - Near Bath in South West


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 Post subject: Re: Porsche 928 Electrical woes
PostPosted: Wed Feb 24, 2010 1:17 pm 
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Joined: Mon Nov 05, 2007 4:15 pm
Posts: 2410
Location: BOURNEMOUTH
Hi Paul :)

I can help with some of those lol...

The fog light warning light is built into the round switch you press, on both front and rear fogs..

So... Turn on headlights while ignition on and push switches IN...light in switch SHOULD illuminate....if not its a tiny little bulb in switch...

Drivers seat.... different motors for up/down and front back.... so could be switch or motor or cable disconnected.....try pressing switch with your head near seat and see if you can hear the motor turning....

Windows are switched seperately, fuses ???

All the best Brett :)

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928S2 AUTO V8 4.7 1986-XPIPES ANDERSON RACE EXHAUST,K&N, WIZARDS OF NOS MAXX RACE CONTROLLER & WON RACE REVO NITROUS KIT 2000 HP CAPABLE.
-UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk


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 Post subject: Re: Porsche 928 Electrical woes
PostPosted: Wed Feb 24, 2010 2:05 pm 
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Joined: Sat May 09, 2009 12:33 pm
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Location: The New Forest
TIPEC membership: 928
Skype ID: andrew.fenwick928
Note this applies to my 91 S4.
The windows, sunshine roof and rear wiper (if fitted) seemed to be all activated by the window controller, which is hidden under the passengers seat - when trying to operate ie the window do you hear a clicking noise coming from under passenger seat?

I have just removed my controller - cleaned up the main relay (there are 6 in total) my passenger window now works again, but not the other which has been kaput for sometime....... still checking the pcb board etc. will let you know what happens.

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Andrew





928 S4 1991 White/Grey
Cayenne GTS 2009 Black/Black
http://www.holidayhomes4u.com


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 Post subject: Re: Porsche 928 Electrical woes
PostPosted: Wed Feb 24, 2010 2:27 pm 
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Joined: Sun May 31, 2009 4:59 pm
Posts: 924
Location: Bath, UK
TIPEC membership: 5406
Hi Andrew,
That is only on 88 or 89 onwards models. The earlier models don't have that box fitted.

I haven't investigated too much yet, and had checked the fuses when first got the car. I suspect could be the relay, but after all advice and thoughts still.

Regards
Paul

_________________
1985 928 S2 Iris Blue
2006 A6 3.0 Quattro
2003 4.7 H.O Grand Cherokee

Gone but not forgotten:
1986 944 Lux
1988 944 Lux

Location - Near Bath in South West


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 Post subject: Re: Porsche 928 Electrical woes
PostPosted: Thu Feb 25, 2010 12:52 pm 
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Joined: Sat May 09, 2009 12:33 pm
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Location: The New Forest
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Skype ID: andrew.fenwick928
Hi Paul,
Sorry I did think there was a possibilty that it did not apply to your cars "year" - but when I get it sorted hopefully it may help others, as these electrical problems on 928’s are sometimes really baffling.

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Andrew





928 S4 1991 White/Grey
Cayenne GTS 2009 Black/Black
http://www.holidayhomes4u.com


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 Post subject: Re: Porsche 928 Electrical woes
PostPosted: Fri Feb 26, 2010 2:34 pm 
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Joined: Sun May 31, 2009 4:59 pm
Posts: 924
Location: Bath, UK
TIPEC membership: 5406
Thanks Andrew and helpful to others I am sure who have that box under there. I found out as I bought the later window switches in error that run to that box (which I didnt have) :-)

Regards
Paul

_________________
1985 928 S2 Iris Blue
2006 A6 3.0 Quattro
2003 4.7 H.O Grand Cherokee

Gone but not forgotten:
1986 944 Lux
1988 944 Lux

Location - Near Bath in South West


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