Guys!!! he is talking about MSD BALLAST not MSD IGNITION!!!

brown and blue on diff sides of ballast doesn't have to be spliced together I REPEAT, DOESN'TY HAVE TO BE SPLICED TOGETHER... thats is just for MSD IGN MODULES, but not for the ballast with stock ECU modules

I state brown and blue wires on diff side ob ballast because on earliers, the wire going to coil is blue but with a brown splice on ballast coming from ign switch ( that changed since 70 with electronic regulator, getting brown to coil ). These also gets another blue on the other side of ballast.


All you have to check is if you have power on blue wire of ballast in RUN. and if you get power on brown wire of ballast in START.


BTW, ECU GETS POWER IN START, is not true doesn't get power in Start. What is true is ECU doesn't get power in Start directly coming from ign switch. It gets power in Start THROUIGHT teh ballast, what woks like a splice. Of course, reduced power, due the ballast effect, but enough to work.


The ballast making the splice function is what help you on check the correctnes wiring and ballast function if you get the brake light at cluster dimmed but still working when cranking