Peter2 wrote in message
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"N_Cook" wrote in message
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Peter2 wrote in message
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I was not told what its from. Googling I only found references to
overdrive
inhibitor switches not tachometer type sensors. So a standing 12V across
them ?


Your description is an inductive tachometer pickup coil... I don't think
you
will find any biased with 12 volts across them either.



I hope gearboxes make good Faraday screens against ignition EMI, there is no
braid screening around the signal wires though.