MSD 6AL and Altnator Idiot Light

[elev8_dude]

Wanted to get some info on MSD 6AL installation. I have also replaced my coil with an MSD blaster coil. My question is, the old coil system used a black wire that ran from the coil post #15 directly to the fusebox. With the removal of that coil, the black line was omitted. The MSD box has a thin red wire which I have assumed would take the place of that previous black line.

In the end my issue is that my alternator idiot light is inconsistent on turning on. Turns on in the morning for 2 to 3 minutes then goes off. Then will work for 2 to 3 days then not work again. I have rewired my alternator (no voltage regulator) and have checked everything. Don't know if this will fix the issue but its all I can figure. Any help would be appreciated. I drove in today to work on 10 volts