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Old 02-11-2012, 07:08 AM
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tach wont work

i have a new harnness pro comp ignition autometer tach with shiftlight tach wont work. red wire 2 power green2trigger withshiftlight

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Old 02-12-2012, 09:00 AM
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The tach should also have a black ground wire, it needs to be connected to a solid chassis ground.
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