chances are its not the main fuse because there wouldnt be power goin to the tacho then unless u ran the power from the main power wire. get a wire tester or voltmeter and check both power wires for power coming to them
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chances are its not the main fuse because there wouldnt be power goin to the tacho then unless u ran the power from the main power wire. get a wire tester or voltmeter and check both power wires for power coming to them
did u join both wires for your power??all you need do is join into one and it will be powerful enough. join it to the ignition one. that could be your problem
ya will need both for the tacho i taught u meant u joined the 2 power wires coming to the radio together. try the wire tester an see are both your powers coming to the radio working