95' Blazer Won't Start!

I Have a 95' Chevy Blazer 4.3L 4X4 4Dr and a little over a moth ago driving on the freeway, shifting into overdrive the truck stoped and stalled out! Was able to coast to side of road & wouldn't start so I Towed it back home. I've Got Pressure to the Fuel rail, Got Spark with 12 volts off battery. Pulled the starter & kicks just fine. The Check Engine light had came on when it happend. My Truck is a OBD1 compliant with a OBD2 16 pin connecter and I'v used a OBD 1 & 2 type scan tool & it was unable 2 pull anything up! I Have used a jumper wire & pulled a 12. The battery had died from trying 2 turn it over several times so I jumped charged my battery and from that, with no key in the ignition & everything off, the starter started kicking with the engine cranking over! Weird! I've put the key back into the ignition & jiggled the handle, From this point on I have checked everything that I can think of & to this day if I put the negitive lead back on the battery the starter keeps on kickin! I don't know what eles do I have an Electronic Transmission I'v checked the Neutral Safety switch with 12 volts and now I have my steering colum pulled apart to check the ignition but @ this point Im fresh out of Idea's! ? :(