Under fusebox is a gromet to get to inside under dash pull wire through. Remove front seat as well as trim panel. Remove back seat as well as trim panel. Run from under dash,under carpet, inbetween seat bolts, under back carpet, under backseat. It all in taking the seat out. I put 2 cadence amps in a 2000 for my brother. Don't know if it is the same for a 2004 or not.
I could never run it under the car. To afraid of rust, as well as wire wear. These amish roads out here are gravel.
4 American Bass VFL 6.5s
Ohio Generator 305 amp alt
4 Vifa Tweets.