NEED HELP! '91 ram need diagnostic help!

First thing would be to get yourself a factory service manual. From my quick search you do have a small cylindrical relay for the ignition and a crank position sensor. No old style control box though. Best thing is to get out a multi-meter or test light and start figuring what isn't getting power when it does die. Also sometimes you can do simple tricks like disconnecting the crank sensor and see if it will re-fire after it dies (some vehicles will go into a closed loop or kind of a limp mode that will bypass that sensors input) this may work on your setup. Check to make sure you have a good battery to start then go through the entire ign. system, make sure you wiggle the wires to check for any bad connections.