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International Automotive Technicians Network
Re: Speedometer Inop
Posted to HD/Fleet Forum on 9/9/2020

Do you have a way to look at the ECM inputs? The signal from the speed sensor should go to the ECM and then to the speedometer. If you can't see them coming into the ECM you may have a wiring issue, if they are coming into the ECM they may not be getting to th... Login to read more.