hey, i jave a 1971 stang that didnt originally have a tach. I bought a tach/cluster from a mach 1. I plan on putting this in soon. The tach has 2 wires( going to a plug) running out from the back of it. There isnt the other side of the plug in the mustang. Where should i run these 2 wires to, or where do they hook up?? -Jon

 

what colors are the wires?

I cant say for that mach1 setup...mustve joined the loom somewhere, but normally there are several wires.

red = to a positive power source (usually like the ignition switch so it only comes on when the car is running)
black = earth
blue = to the negative terminal on the coil

one or more pairs to the iluminating light in the tach.

not much help sorry.

 

Well.. the 2 wires coming out are both black. they have a male/female tpye plug on the end. there are no markings or anything. I guess ill see if my electrical book has anything... -Jon

 

Looked in the book, and found it! The Male side goes to a 12V power source and the female side goes to the + side of the coil! -Jon