[bensenvill]

ericf is right, your hood switch is your most likely culperit [look at vix's post in here for photos]. the trunk and doors use an open circuit to indicate that the doors are closed where the hood uses a closed circuit. easiest way to test would be to unplug the hood sensor and stick a paperclip in the wireharness and try again.

but to answer your question on where the wiring is located. It is all on the passenger side under the dash. you have your 'CONTR ASY-R/CONTR LK & ALARM SYSTEM' box [black mounted vertically] located right above your ECU [that ones a silver box]