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Registered
Join Date: Apr 2004
Location: Calgary
Posts: 58
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Speed "o" Stop Working
Got in my 88* 911 & I noticed that the speedo was not working. The miles stop counting as well.
Where should I start looking first, second, third..... thanks Bello |
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04-05-2004, 02:18 PM
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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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04-05-2004, 02:21 PM
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911 user
Join Date: Sep 2001
Location: East of Eden, West of the Sun
Posts: 2,411
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Could also be the sensor.
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Where once the giants walked now Mickey Mouse is king. My other car is also a Porsche. |
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04-05-2004, 10:50 PM
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If you were doing any work around the fuse box recently, check to make sure your getting 12V to the power lead (black wire). Mine stopped working and I took it to a local place to be checked. The speedo was fine. I traced the problem to a loose connection at the fuse. Realigned the wire, tightened the screw and no problem since.
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Jim Dowty 97 911 Coupe (Forest Green metalic, sunroof, leather) PCA RSR region Insurance chair and Board member Gruppe B #309 |
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04-06-2004, 04:18 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,956
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If the speedo and odo stopped then it is not the plastic gear inside the speedo since that only applies to the odo. If both stopped then I would check connections, fuses, power (the speedo is electric, the odo runs off of the speedo). It could be the sensor, but more than likely not since the most common malady for the sensor seems to be loosing a magnet which just causes the thing to run slow.
Have you done any work anywhere on the car recently??
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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04-06-2004, 05:15 AM
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Is the speedo to the 88 driven by a cable? Undo the cable housing and pull on the inside cable. If it pulls out of the housing, its done broke. Mine broke about 2 hours after I turned the guage too far CCW and put a kink in the cable.
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'75 911S 3.0L '75 914 3.2 Honda J '67 912R-STi '05 Cayenne Turbo '99 LR Disco 2, gone but not forgotten |
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04-06-2004, 08:17 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 55,956
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no cable in '88, it's electric, sender with 8 magnets in the tranny.
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa SOLD 2004 - gone but not forgotten
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04-06-2004, 08:19 AM
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Registered
Join Date: Feb 2004
Location: South Elgin, IL
Posts: 1,084
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I had same proublem with my 86. The insulation on the wires was cut open conected to the sensor. It looked like the PO tryed to fix with electrical tape.
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Mike Minister of YEP 1986 targa 3.2 " RED" 1970 Little T (Wife’s car) Gruppe B # 917 |
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04-06-2004, 01:52 PM
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My 73's speedometer stopped working the other day so I crawled under and checked the cable at the transmission end, no problem there. Pulled out the speedo, no problem at that end.
Then I remembered the best fix for old speedometers that stop working... ring finger knuckle, tap once on the bezel right about the 100mph mark, works fine now. Shoulda started with that in the first place....
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Bruce Herrmann 97 C4S '04 330i '08 Cayenne S '07 4.8 X-5 |
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04-06-2004, 03:45 PM
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1997 Porsche 911
Helga
1975 Porsche 914
1973 Porsche 911S 2.4S 
