I have MSD and a FMS tach. I hooked up the green wire to the neg. side of the coil, I astart the can and the tach doesnt work. I know im getting power to it, when then ignition is one, the shift light comes on for a few seconds But when i run it, it doesnt budge. There is a note on the instructions to that when using MSD ignitions to hook it up to the tach terminal, where the hells is that at. Pretty much, where are you guys who run MSD and an aftermarket tach running your wires. Thanks.