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Old October 30th, 2011, 10:00 PM   #1
BlooMule
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Tach hookup

I have a 94 F150 with the 300 ci six, where would I hook up an aftermarket (Sun, if it matters) tach to the ignition? GM's HEI has a dedicated tach output, but I see nothing marked as such on this.
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Old October 30th, 2011, 10:42 PM   #2
JeepManHuff
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Generally the tach wire is spliced into the negative side of the coil primary circuit.
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Old October 31st, 2011, 08:20 AM   #3
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Thanks, i'll try that. I was thinking along those lines but didn't want to risk killing the ignition module.


Still don't know why this truck has a 5 speed and no tach, my 89 has one.
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Old November 1st, 2011, 07:10 PM   #4
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there should be a tach wire running into the gauge cluster. i can check up with my school's program to find out the color and location of it.
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