Factory tach install
I'm sure this has been covered before, but I searched and couldn't find an exact answer. I am installing a factory gauge cluster from an 86 Grand Prix in my 80 LeMans. It came with idiot lights. I know all I need to do to for the oil pressure and water temp gauges is change the sending units.
What I don't know is about hooking up the tach.....did the factory wiring harness include the tach plug? If not, how do I wire it from the harness plug that goes into the back of the tach/speedo unit? Do I need to put a filter on it (I have seen different opinions on this).
Any insight anyone has would be appreciated.
-Dave
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2 wrongs don't make a right, 3 lefts do. 4 lefts make a NASCAR race but who cares?
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2004 Grand Prix GT daily driver
1974 LeMans GT 455
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