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Is the signal to the Tach the top or bottom prong? I just had my I/C rebuilt, most of the capacitors were in bad shape and were replaced. Now the fuel gauge works but the Tach is still flakey. Worked for about 20 minutes then turned off again. So I am assuming the I/C is in good shape. Now I must check the wiring to the Tach, and the condition of the OVP.
Can I take my multi meter and take a measurement at the tach plug to see if a signal is getting through?
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