dubstar

well, went to pick the car up from the shop today, since they told me that it was fixed ...had to take it in because it wasn't getting any spark. my mechanic told me that one of the ecu pins had fallen out and also that a fuse was missing. i went and drove it for a while after that and everything seemed fine. well, i drove up to the store and on the way there i noticed a couple things. first, the dash lights started dimming, then the "abs" light turned on,after that the stereo died and the power steering and my safc cut off. got to the store and tried to start it again and nothing happened, so i waited a few minutes and tried again and it started up, so i decided to try and get the car home (i live about 2 miles away), and half way home it does the same thing again but just completely died this time. called a tow truck to come and pick the car up and when i tried to shift to neutral (automatic) it wouldn't even engage the shifter so it had to be drug up onto the rollback (poor brand new tires). so its back at the shop now awaiting morning so someone can look at it. anyone have any comments/suggestions? anything would be appreciated. thanks

btw, its a '92 sc300 1jz swap