Tach output wire

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05-16-2009, 04:50 PM

Mustangkiler

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Tach output wire

Wanted to know where on my 94 gt is my tach output wire that i need to run to my msd 6a box?

05-16-2009, 04:51 PM

AdderMk2

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you dont

05-16-2009, 05:10 PM

Mustangkiler

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Then how is my tach still going to work afterwards? Does it just read it off the 8874 harness i ran to the coil?

05-16-2009, 05:18 PM

Mustangkiler

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I just want to make sure my tach will still work right, last time i put a box in a car, the tach didnt work right after that, i need to know if i need to run my tach wire to the box for my tach to work right afterwards or if i dont need to mess with it at all and it will still read it right.

05-16-2009, 05:33 PM

AdderMk2

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tach is going to work the same way it does stock.. you ony run 6 wires from an MSD box.

2 to the coil, 2 to the harness that was connected to the coil, and 2 to the battery for power (or a switched power source)