I THINK.... (no blame me for being wrong..NO LIABILITY!!!)
Top wire = go to tach lead
2nd wire = constant 12V + lead
3rd wire = Ignition 12V + lead
4th wire = NO CLUE , but a 12V +
5th wire = looks like a ground
The pic to the right is one of a ignition coil (similar to a blaster 2 coil MSD yeah?) but I have no clue which wire goes there, plus it says to hookup to the NEG side of the coil..Al the wires except the ground wire from the diagram are all POSITIVE it seems...
And you dont want to ground the light to the neg side of the coil..Id rather ground to battery of bare metal...
Hope this helps! anyone else??????