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Most two-wheeled home bike mechanics have a multi-meter and are conversant with testing for continuity and measuring voltage, but in my experience, few test current flow.
The current in a circuit is every bit as important as voltage, but whilst many DIY-ers have a basic multi-meter, few of these will measure current in excess of 10amps, which is often inadequate for the current drawn in bike circuit. When I say few, I have never seen one that