ok how to wire a tach up

[hofficergrover]

any body know how to wire a tach up on a efi festiva coil?

[Damkid]

the wire on an aftermarket tach for the tach signal needs to tap into the yellow wire coming off the coil to get the spark signal

[hofficergrover]

ok and the other wire is the one to the ignition right

[Damkid]

i'm honestly not 100% sure, which tach do you have? any pics?

[knux511]

here is what helped me do it.

http://www.fordfestiva.com/forums/showthread.php?t=13262&highlight=wiring+tach

[hofficergrover]

the green wire is the singal wire and the red is the 12volt sorce wire for a switch i inhanced the colers haha

[hofficergrover]

ok my tach needs a 12volt power sorce for when the key is turned on. when it was in the car when it was still carbed the red wire whent to the positive sid of the coil on this coil would the bigger black wire be the one i should splice onto? because all you aother guyses stuff jsut confused me and sounds way to hard when its seam it aint i just wana know if the bigger black wire is waht suplies the soil with a 12volt sorce with the key turned on.