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International Automotive Technicians Network
Re: Speedometer and Tach
Posted to HD/Fleet Forum on 3/20/2024

Sounds like you should get a scope on various circuits at the cluster and see what (if anything) happens when the gauges act up. Scope the signal wires, the powers, and grounds.

If everything external checks "good" when the symptoms occur, then it would have... Login to read more.