What would make a 1983 Toyota Celica Supra keep blowing the EFI fuse every time I turn the key to ACC position?

1983 Toyota Supra keeps blowing the EFI fuse when I turn the key to Acc not even trying to start it?What would make a 1983 Toyota Celica Supra keep blowing the EFI fuse every time I turn the key to ACC position?A power wire is shorted out. When you turn on the switch, it sends power to the wire, which is grounding out, and popping the fuse. My guess would be a wire got hot and melted the insulation off and it's shorting out on you. Good Luck.