ecu fuse keeps blowing, please help

[nothingFancy]

i got a 91 240 hatch with redtop sr and 62 ecu

im stuck in this biggest jam ever and i ran out of ideas, car was running great, i shut it off to talk to some 1 and i go to start it back on it fired up then it shut off. then it never wanted to fire again. it keeps crankin and cranking, it keeps blowing the fuse underthe dash to the ecu as soon as i put the ignition on the on position. i have no idea y.

thanx.

[Blown240sx]

You have a short some where. If you have an after market alarm you may want to remove it and test from there. Mine did the about the same thing but it was blowing the Ign Fuse. So if you dont have an Alarm youll need to trace the wiring back cause you have a bad ground or a power touching a groud somewhere which is over loading the fuse.