Installing a Autometer tach need help

[illeagleracing]

Cant find anything wiring wise for a 1990 zr1. Trying to find the signal wire for tach install. Rather do it without removing the plenum again but not sure which wire is the signal wire. Thanks fellas

[Ccmano]

Just search the "Solutions" thread, it's there.... But here you go.
H

http://www.zr1.net/forum/showthread.php?p=151359#post151359

[illeagleracing]

Thank you very much sir couldn't find that, tach installed