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Speedometer help
Replaced the speed sensor with a brand new unit. However, my speedo still does not work! Can someone please help me with this problem. I have checked all fuses and still no speedometer. Is there something that I may have missed? I though this would be a easy fix. Now I'm just waisting money because this is the second sensor that I have purchased.
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06-05-2010, 11:45 AM
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What would Darth Vader do
Join Date: Feb 2001
Location: Orange, California
Posts: 1,324
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It might help if you provided a description of your car, model number and year. Diagnosis is predicated upon that information. Best to put that in your commentary section of your profile such as the way mine is set up. Thanks
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1983 944 (2002 to now) 3-924's (Sold) 1967-912 (Traded) NEVER put a used water pump in your car... |
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06-05-2010, 12:40 PM
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The car is 1987 944S.
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06-05-2010, 07:50 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
Posts: 24,705
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speedo gear?
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-05-2010, 08:25 PM
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What would Darth Vader do
Join Date: Feb 2001
Location: Orange, California
Posts: 1,324
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Very nice car, Jess.. By "sensor", I assume you are talking about the one on the transmission?
Possibly the only other component you could check is the relay. That might be interchangeable with another relay on the relay board so checking that should cost nothing unless you need a replacement. Also, since you bought two sensors, assuming they were both good, you might offer the second one for sale on the classified for sale board here on Pelican..
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1983 944 (2002 to now) 3-924's (Sold) 1967-912 (Traded) NEVER put a used water pump in your car... |
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06-06-2010, 02:39 AM
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The one on the transmission is correct. I will be checking for a bad relay today. Thanks for the information. I hope this works.
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06-06-2010, 03:36 AM
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Unfortunatly, I could not find any information about a relay that has to do with the speedometer operation. The speedometer gear is what generally causes the miles to stop rolling on the car right? I would not think that it would stop the mph reading to stop or does it?
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06-06-2010, 05:49 AM
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Porsche 944S Club Sport
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Where can we purchase the speedo gear at a reasonable price? I have the same problem on my 87 S as well...
Thanx,
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Guru944  2006 955 Cayenne S Titanium Series - Marine Blue, 1987 Porsche 944S Club Sport. 1987 Buick Turbo-T Lightweight "Great White", +500HP, TA49 Turbo. http://www.blackbirdmotorsports.com, 944/951/968, 911 and 955/957 Performance Solutions. Thank you Lord, for your Loving Kindness, Tender Mercy, and Grace. Only You are Faithful. |
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06-08-2010, 03:25 PM
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winter-hater club member
Join Date: Oct 2003
Location: salt lake city, utah
Posts: 24,705
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Quote:
bad connections at the back of speedo unit?
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2000 Corvette - ????, 2007 Buell XB9R - Astrid, 1996 Discovery - Piglet, 2000 Forester "COOL PRIUS!" - Nobody Ever |
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06-08-2010, 03:29 PM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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Quote:
Pelican Parts - Automotive Parts and Accessories - Porsche & BMW How to: Odometer Gear replacement for Electronic Speedometers (long) OR Pelican Technical Article: Porsche Dashboard Gauge Repair and Refurbishment More gears and stuff.. Odometer Gears | 72 Croatan Road | Newport News, VA 23606 | 757.593.3478 Read the warning in the above link carefully GL John
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1988 924S, 85,750K ..+ 1987 924S, 154K DD (+15K est. bad odo) |
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06-08-2010, 04:00 PM
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Porsche 944S Club Sport
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Thanx John_AZ and all you Guys, great thread and Topic...
Later, Jean.
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Guru944 2006 955 Cayenne S Titanium Series - Marine Blue, 1987 Porsche 944S Club Sport. 1987 Buick Turbo-T Lightweight "Great White", +500HP, TA49 Turbo. http://www.blackbirdmotorsports.com, 944/951/968, 911 and 955/957 Performance Solutions. Thank you Lord, for your Loving Kindness, Tender Mercy, and Grace. Only You are Faithful. |
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06-09-2010, 09:29 PM
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Registered
Join Date: Feb 2010
Location: Hastings, Minn.
Posts: 146
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Well grounded
Consider checking and/or redoing the grounds. From the searches I've done on this site, poor chassis and dash grounds will cause a few ills. I plan to do the same to see if it will help my speedo on an '87 944 turbo. When the car has been sitting a few days it won't indicate speed until a few blocks from home. The needle then jumps up and works fine until the next time it sits for a while. I also replaced the sensor and it helped but not a complete cure.
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06-10-2010, 07:12 PM
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What would Darth Vader do
Join Date: Feb 2001
Location: Orange, California
Posts: 1,324
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Sorry, I assumed since the speedo was electronic (sensor wise) there must have been a relay like most things electrical and/or Porsche. Apparently I was wrong and I sincerely apologize for the error. I also researched this and located no mention of said relay.
Quote:
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1983 944 (2002 to now) 3-924's (Sold) 1967-912 (Traded) NEVER put a used water pump in your car... |
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06-10-2010, 10:55 PM
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"Le Mans II"
"Big Blue" 955STi
NYSE Carrera
