where to wire a key-on 12v feed for alternator plug?

i have a problem of my IG1 fuse blowing instantly at key-on on a 4Runner - i realized if i wire the alternator 12v exciter feed from somewhere else the system works (aka avoiding that fuse altogether).....can anyone suggest a good place to wire it in ? only has to have power at key-on/engine-on

it seems that one of the 8+ things on that IG1 circuit is shorting it out