The negative terminal from the battery grounds at the same spot on the head which everything else grounds to via a 2ga wire. A 2ga mil-spec wire goes...
I feel your pain. I've had excellent results with megasquirt. Twice I had problems one almost made me throw in the towel. Both times it was something...
I haven't gotten that deep into it. It's the MS3 pro mini, and they're fairly new. I got this one in June, so I may be a guinea pig on this. I bought...