MustangKid5.0

well i bought a tach and i was hooking it up....there a green,red,black,and white wire........but my problem is i cant get it to read rpm's i hook it up to my coil......i have everything else right.........i dont have a msd box so it goes on the coil help please

Black Snake

Green wire goes to neg side of coil.

MustangKid5.0

yeah man i've tried that......but once i gett everthing else wired up i gett back to yah

PONY GUY

www.autometer.com down load the manual , red power black ground , white is illumination green goes to coil

mcfomco

Sounds like your not getting a good power source or ground, check them good to make sure the are good.