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Croydon
Nürburgring


Joined: 21 Jun 2003
Posts: 421
Location: UK


PostPosted: Wed Jul 24, 2019 9:53 pm    Post subject: Dead speedo needle Reply with quote

My car was collected today by local boys for new eibach kit. All went well but the guy said that when he took the car the Speedo needle was dead and just stuck in its natural pre ignition point. I drove the car up the road last night on its return and in to my garage and the needle indeed didn’t move.

Car had been on trickle charge and in the garage for the previous 6 weeks and prior that I’d had a perfectly working Speedo.

As ever thanks in advance

Ian

Last edited by Croydon on Thu Jul 25, 2019 7:11 am; edited 1 time in total
 
  
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ch3tman
Imola


Joined: 08 Dec 2012
Posts: 793
Location: South Bucks

1995 Porsche 911

PostPosted: Wed Jul 24, 2019 10:13 pm    Post subject: Reply with quote

Not a proper solution by any means, but when driving, try giving the glass on the speedo face a tap.

Mine has done this in below zero temperatures, and a tap has always sprung the needle into life. Though tt's not happened often enough to really troubleshoot or replicate. On two occasions, I wanted to see what would happen without the tap... and both times as the vehicle speed reached above 20mph, the needle jumped right up to the expected position with no issues thereafter... Dont know
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decgraham
Barcelona


Joined: 17 Sep 2008
Posts: 1377
Location: Spain


PostPosted: Thu Jul 25, 2019 6:59 am    Post subject: Reply with quote

When I had my 964 Targa my speedo stopped working as well as the rear spoiler stopped going up. The problem was a sender which works the speedo and in turn the spoiler. Not sure if its the same on the 993 but perhaps worth a check.

ATB Smile
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Tobesetc
Albert Park


Joined: 02 Jun 2014
Posts: 1606
Location: West London, UK


PostPosted: Thu Jul 25, 2019 7:23 am    Post subject: Reply with quote

Mine had same issue. Tap worked for a while. Eventually it stopped, as did odo, and would not restart, so got it fixed. Nylon thread/teeth wear out. Happens to us all, in the end.
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Croydon
Nürburgring


Joined: 21 Jun 2003
Posts: 421
Location: UK


PostPosted: Thu Jul 25, 2019 7:28 am    Post subject: Reply with quote

Tobesetc wrote:
Mine had same issue. Tap worked for a while. Eventually it stopped, as did odo, and would not restart, so got it fixed. Nylon thread/teeth wear out. Happens to us all, in the end.


Who did you use to do that may I ask?
 
  
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decgraham
Barcelona


Joined: 17 Sep 2008
Posts: 1377
Location: Spain


PostPosted: Thu Jul 25, 2019 7:48 am    Post subject: Reply with quote

Hi Croydon,

I had my speedo respired a few years back by a guy in London, good job and good value for money. See post below.

http://911uk.com/viewtopic.php?t=129064&highlight=speedo

ATB Smile
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ToreB
Approved Trader


Joined: 13 May 2010
Posts: 617
Location: Oslo, Norway


PostPosted: Thu Jul 25, 2019 9:04 am    Post subject: Reply with quote

I would start with checking the instrument fuse in the fusebox.

Sometimes the instrument connector pins corrode and causes intermittent contact. It could be a good idea to extract the instrument, and pull the two connectors off and on 2-3 times. This can remove corrosion. Be careful to not use 5-56 or similar oils back there, use good electronics cleaner and do not let it drip into the instrument housing.

Cheers,
Tore
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'95 993 C4

Bergvill F/X
Porsche electronics specialists, products and repair services.
 
  
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Croydon
Nürburgring


Joined: 21 Jun 2003
Posts: 421
Location: UK


PostPosted: Sat Feb 08, 2020 11:36 am    Post subject: Reply with quote

Me again ., thought it had sorted itself but appears it hasn’t. Will explore fuses then removal of gage before sending off.

Ian
 
  
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Marky911
Sepang


Joined: 04 Jun 2009
Posts: 2816



PostPosted: Sat Feb 08, 2020 7:00 pm    Post subject: Reply with quote

I’m amazed you haven’t had a load of “You see! They don’t like being not used” comments, from all the high mileage guys. Grin
 
  
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Tobesetc
Albert Park


Joined: 02 Jun 2014
Posts: 1606
Location: West London, UK


PostPosted: Sun Feb 09, 2020 3:23 pm    Post subject: Reply with quote

Tobesetc wrote:
Mine had same issue. Tap worked for a while. Eventually it stopped, as did odo, and would not restart, so got it fixed. Nylon thread/teeth wear out. Happens to us all, in the end.


Annoyingly, this has started again and it's not long been fixed! But it's away for an facelift so not going to be dealt with for a while!
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Croydon
Nürburgring


Joined: 21 Jun 2003
Posts: 421
Location: UK


PostPosted: Mon Feb 10, 2020 7:44 am    Post subject: Reply with quote

hi, could someone confirm what fuse is associated with the speedo? is it fuse no 15 and its 5 amp?

next phase, popping the gauge out to disconnect/reconnect power clean connections etc.. easy job?

I'm really hoping that's it job done and I don't have to send the thing off but we will see.

Experiencing a bit of a double whammy, no speedo and a terrible heater fan noises which is another proper pain in the arse job. some aspects of the cars design is ridiculous!

as ever thanks in advance gang

Ian
 
  
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Croydon
Nürburgring


Joined: 21 Jun 2003
Posts: 421
Location: UK


PostPosted: Mon Feb 10, 2020 2:42 pm    Post subject: Reply with quote

C'mon team!?!

ok did a bit more research and its a 7.5 amp fuse and its no 18.

Purchased electrical contact cleaner so ill pop the dial and unplug, clean and see how that goes.

Also been pointed in the direction of .. ABS ECU and Speedo sender cable as possible causes.

Ian
 
  
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cableguy
Watkins Glen


Joined: 10 Sep 2007
Posts: 2105
Location: North Yorkshire


PostPosted: Mon Feb 10, 2020 9:10 pm    Post subject: Reply with quote

Some info here: http://911uk.com/viewtopic.php?t=47920&highlight=speedo+needle

C.
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Croydon
Nürburgring


Joined: 21 Jun 2003
Posts: 421
Location: UK


PostPosted: Tue Feb 11, 2020 8:19 am    Post subject: Reply with quote

cableguy wrote:
Some info here: http://911uk.com/viewtopic.php?t=47920&highlight=speedo+needle

C.


Nice find, thank you CG.

Ill blat up the dual carriage way and see if the spoiler is deployed and the needle is still stuck dead. The odo and trip are actually working fine.

Ian
 
  
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