need some help with my wiring.

i've found my main power feed, and that's hooked up to +ve.

i have lights (minus park - sep circuit...?), brakes, indicators, fan, interior lights, fuel guage and factory AM radio with remote switch...

now to the engine bay. one wire disappears under booster and presumably to my ignition. out of the same harness --->

i've got a +ve on 3 wires with ign to ON
i've got 2 of those ^^^ wires still lighting up when switched back to ACC, and the last wire drop out. however, when the last wire is tested on -ve with ACC, it lights up.

i've also got a whole bunch'o' wires on a sep. harness that light up when ON and ACC (about 7 of the lil' bastards) and tested on -ve but show nothing on +ve.

what fuse do a pair of 10in thermo's take? i've been thru 2x 10A fuses.

last of all - WHERE THE HELL IS MY IMMOBILISER HOOKED UP TO? i can't make that bitch flash for the life of me.

please help! if you're in WA i have a carton waiting for the person who can either
a) hook it up, or
b) send me in the right direction to hook it up myself.

cheers y'all