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Old Mar 8, 2012 | 09:29 PM
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r2000f150's Avatar
r2000f150
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Mountain Pass
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From: GRINNELL
tach hookup
thanks in advance can anyone give me tach hookup on a 74 f-250 with a 390 thanks
 
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Old Mar 8, 2012 | 09:33 PM
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HIO Silver's Avatar
HIO Silver
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Joined: Dec 2009
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From: NorCal
Green - Tach signal from coil
Black - Ground
White - Instrument Lights
Red - 12VDC

Don't forget to set the tach switch to 8 cylinders.
 
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Old Mar 8, 2012 | 10:28 PM
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r2000f150
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From: GRINNELL
positive or neg side of coil the green wire thanks
 
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Old Mar 8, 2012 | 10:49 PM
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fmc400
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Joined: Apr 2004
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From: Austin, TX
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Originally Posted by r2000f150
positive or neg side of coil the green wire thanks
Negative side.
 
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