Thread: VDO Classic tacho Hay Wire
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05-29-2009 11:06 AM #2
CHR Member/Contributor
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- Mar 2005
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- Car Year, Make, Model: 63 Nova SS
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It sounds like you have a poor ground -
I believe that your tach has a modular connector on the back with 8 pins. Make absolutely sure pin 3 is grounded. If need be, run a wire to the negative post on the battery to test. The only other pins that are used are:
Pin 2 - goes to switched 12 volts
Pin 4 - goes to your tach output put on the MSD box.
Hope this helps,
Glenn"Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil
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