Originally Posted by tom harris
4 wires at back of tach which one does what? there in a north south east west positions, this is a old tach and the wires have all be replaced with black. also can this tach be hooked up to a flame thrower 2 coil? Thanks, harbor rat
You might find the original wire colors at the point where the wires were spliced.
Typical tach wiring layout:
Black = ground
Red = 12VDC switched
Green = coil "-" terminal, will be the same terminal as the wire going to distributor
White = lamp
It will work w/the Flame Thrower 2 coil. If you are using an ignition amplifier, follow their instructions.