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Super,
Terry is correct that the counter only drives the warning light, and serves no other useful purpose! It apparently uses a transistor circuit to drive Your Noise Source ... an electromechanical counter similar to an odometer, that triggers a switch that closes after 30,000 miles.
One solution would be to locate the counter, and wrap it in a box of R-19 pink fiberglass insulation and duct tape ... similar to the Lithium Hydroxide contraption the Apollo 13 Astronauts built of scrap materials to save themselves from rising CO2 levels ...
Another fix would be to disconnect the brown ground wire at terminal 31 on the mileage counter module from the ground common piggy-back at the oil pressure gauge. That should kill your ticking noise! Don't disconnect the Red/Blue wire and leave it dangling around uninsulated, as it is raw +12 Volts from the speedometer piggy-backed connection! The G terminal White/Red wire that supplies the drive pulses for the counter from the speedometer can be disconnected, but I would insulate it to keep from harming the speedometer. The worst thing that could happen would be for it to bump into some 'loose' +12 volt connector by accident!
I get the impression that the mileage counter module doesn't have quick-disconnect connectors, just wires coming out in a bundle ... did I read between the lines correctly, Super?
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Warren Hall
1973 911S Targa
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