Medium and Heavy Trucks
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If the ECM is reading the Vehical speed sensor and you have no response on the speedo gauge suspect the gauge has failed. once you get the gauge checked out/replaced you can install an offset in the ecm for the odometer to read with the proper software to make adjustments to the ecm. This information is stored in the ecm
Hi Erick, My name is***** will be glad to help. On the VSS at the tail of your transmission check if it is two wires or 4. some of the speed sensors were updated to a two function sensor where one half sends the signal to the ECM and the other is for the speedo. Check the harness and the actual sensor for problems. To adjust turn in to bottom out and back off 1/2 turn and lock the jam nut. I will post some schematics for you as well to help
Click here for some schematics to help
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Hi, Did you get this resolved?