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Old 06-14-2003, 10:37 PM   #1
hjalbert
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tach wiring ??

on the back of the factory tach, there are two prongs for wires, one i am sure is for the ground, the other goes to the distributor, My question is which one goes where, or does it matter? for reference purposes lets refer to the the drivers side of the panel as you looking at it sitting in the truck, and the passenger side. other wise, post a pic possibly. thanks for the help HJ
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Old 06-14-2003, 11:30 PM   #2
Low69CST
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One should go to the distributor and the other says 12V so it should plug to your fuse box. Then I don't know bout ground.
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Old 06-14-2003, 11:51 PM   #3
Longhorn Man
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Here you go...
One to the coil, the other to IGN UNFUSED terminal on the fuse box. Everythign you see there that is metal is (supposed to be) a ground. If there is a bad ground, your dash lights won't work, nor your fuel guage, and your blinkers would do real funny things.
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Old 06-15-2003, 12:43 AM   #4
Roberty
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Quote:
Originally posted by longhornmail
Here you go...
One to the coil, the other to IGN UNFUSED terminal on the fuse box. Everythign you see there that is metal is (supposed to be) a ground. If there is a bad ground, your dash lights won't work, nor your fuel guage, and your blinkers would do real funny things.
The one that is marked "Coil" goes to the negitive side of the coil is memory serves me correctly. If your running an HEI then it goes to the terminal marked "coil". Hook it up to the positive side of the coil and it won't work.
Robert
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Old 06-15-2003, 01:27 AM   #5
Longhorn Man
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Robert, that is 100% correct.
I don't know how I failed to say that...
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Old 06-15-2003, 05:30 PM   #6
hjalbert
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im asumming that if i hook up that wire to the "spot marked tach" on my hei dizzy, that it will work, unless im going bonkers, that is my negative side, but i appreciate the help, the pic was most informative thanks again
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Old 06-17-2003, 08:41 AM   #7
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HJAlbert,

I hooked mine up last night in the way that you mention. It matches the hand-held tach exactly up to 1500 RPMs. Then it seems to hit a brick wall.

What has your experience been? Did this work for you? Perhaps my tach is bad.

Brian
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