electrical problem!

[sc0braj]

first i would like to say i'm new to this forum, but i have been in manyyy other forums so i basically know the rules.. so i have a 89 s13 coupe with a red top sr20det swap.. interior is completely stripped(exposing all the metal) and there are some uncovered wires.. so anyways i drove to a friends house and stayed for about 10 min then i switched the car into the acc. mode. the lights come on for a quick second, then all the sudden everything is completely dead! i mean DEAD. i tried jumping the battery but still nothing would turn on.. including digital clock, headlights, brake lights, dome light or the door lights.. im thinkin i might've blown the ecu fuse or maybe the ecu itself?!? i hope its just a fuse if there even is one... so its parked infront of my friends house until i get help to figure the problem out.. please let me hear your ideas!