[/quote]Thats very odd as theres no connection between the circuitry inside and the body of the speed sensor. The two wires simply connect to a reed switch and resistor in series. The rotating magnetic pickup opens and closes the reed switch. Theres no connection to earth via the casing. Still worth a go as its easy to accomplish. Thanks
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Maybe I just jiggled something inside the sensor that resolved it, I didn't take the sensor apart.
