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Registered
Join Date: Jun 2013
Posts: 83
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ODO/trip doesn't work after repair question
Question for the knowledgeable folks on here. Recently had the ODO stop working on a 1982 911. Speedo works but not the trip/ODO. Assumed the two broken plastic gears (as Ive seen before on another car). Pulled the speedo and sent to a local shop. Tech confirmed broken gears, showed them to me after replacement, and bench tested in front of me where both trip and ODO worked.
I brought the newly repaired unit home and reinstalled. Speedo works but still no trip or ODO. everything "seems" to be in place- all connections and sender. Has anyone had this happen before or have any thoughts on what could be the problem? thank you all in advance for your time. Regards, MADC |
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09-18-2021, 05:09 PM
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Join Date: Jun 2013
Posts: 83
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Any help or thoughts would be truly appreciated.
MADC |
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09-27-2021, 03:30 PM
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Checked out
Join Date: Jun 2009
Location: On a beach
Posts: 10,127
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If the speedo is working, the problem has to be internal in the gears.
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09-27-2021, 03:40 PM
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Join Date: Mar 2005
Location: Northern CA
Posts: 4,703
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I had the ODO fixed at PA Speedo and plugged it in and it worked. Ask the shop.
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Sold: 1989 3.2 coupe, 112k miles |
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09-27-2021, 04:00 PM
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Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,530
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That is the problem for the speedo shop, not you.
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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09-27-2021, 04:36 PM
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Brew Master
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Double check your connections. My ground wire cluster was loose on mine and it caused the odo/trip not to advance. I had to pinch the female connector tighter to make better contact and it started working again.
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Nick |
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09-27-2021, 04:47 PM
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Join Date: Oct 2004
Location: S California
Posts: 7,985
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As mentioned above... if the speedo works and the odo doesn't then it's either the plastic gears or the stepper motor. I've seen a couple lately with intermittent stepper motors. It seems like they develop bad spots. If the gears are new and it worked after they were replaced then my guess is the stepper motor.
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1970 911E Sportomatic Albert Blue 1971 911T Sunroof Coupe w/ Twin Plug 2.5 MFI 1973 911E Glacier Blue 1973 911E RSR Tribute Viper Green w/ 3.5 Twin Plug MFI Last edited by jbell959; 09-27-2021 at 08:47 PM.. |
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09-27-2021, 08:14 PM
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Join Date: Jun 2013
Posts: 83
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Thank you all for the replies. I will check all connections and retrace my steps. If that doesn't work, back to the speedo shop.
Thank you again, MADC |
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09-28-2021, 10:06 AM
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1985 Porsche 911 Cab
