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Stelvio NTX ABS error and no speedo

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Dingo1:
My 2012 Stelvio on a ride noticed ABS error light on constantly and no speedo reading. Have checked all fuses, wiring and earths that I can see. Replaced front and rear (new)  ABS sensors, checked Guzzi Diag for codes, battery is good. To me its like ( as a novice ) that the ABS module has no power hence no wheel sensor data sent back to the module but has voltage at the module on both positive feeds. Checked instrument panel for codes and none logged for panel and ECU.  I'm running out of ideas , help much appreciated.

Bulldog9:
There is a speed sensor on the swingarm. Check the connections and wiring first, but may have to replace it. Not an uncommon problem.

Dingo1:
I have replaced both front and rear ABS sensors with new ones. 

Bulldog9:
Have you disconnected the battery and taken the bike out for a ride after swapping the sensors out? Sometimes needs a few miles to recalibrate.

I'm not 100% sure (don't own a Stelvio), and there are variations in the CARC bikes, but I believe the rear speed sensor for the speedo and ABS is the same on the Stelvio. https://www.af1racing.com/883768-OEM-Moto-Guzzi-Speed-Sensor---883768-ex-GU06765400

Dingo1:
Battery was disconnected when working on bike, only rode short distance 100M on driveway to see if speedo registered after replacing sensors and it didn't. Both new sensors are genuine Moto Guzzi and correct part number.

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