S SS90K5 Registered Member Joined Dec 17, 2008 Posts 69 Reaction score 0 Location palmetto georgia Dec 21, 2008 #1 I was given an autometer tach and am wonder how do i wire it up i have a 90k5 with a 350 TBI motor
4X4HIGH 1 ton status GMOTM Winner Joined Dec 14, 2001 Posts 22,423 Reaction score 662 Location Fremont, CA. Dec 21, 2008 #2 Red = 12 volt keyed hot black = ground white = light green = tach lead to white lead from coil