i have a autometer 5 inch tach
got the power working red wire
got the ground hooked up black wire
but the green wire cant figure it out i looked at the coil but saw no negative hook up the to the cap off and heard there would be two screws one that says batt and one that says battery but there are two screws one says tc and the other has something like brge any ideas
this is on a chevy 350 1989 l05
thanks in advance

 

http://www.egauges.com/ATM_Tips.asp?...green_wire.htm

Did that work? If you don't see any info there, that applies. You might email autometer, they have a web-site.