I need help running my power wire from my battery in the fire wall on the passenger side to the back part of my supercab. I am currently running on my 05 stx my power wire from the battery across the back of the fall wall and down on my driver side into a boot. My problem is I can't figure out were the boots are coming into my fire wall behind my battery on the fire wall. I am running the power wire on the passenger side for a couple good reasons one a cleaner install and two it’s a huge waste of cable running it the way I have it now, and third for some reason I am picking up some alternator noise having my power wire and rca cables in the same place. HAS anyone run their wire in on the passenger side? If so what plug did you use and were did it come out at in the passenger side fire wall. Any help will be greatly appreciated.

 

See if this link helps you.
https://www.f150online.com/forums/sh...d.php?t=221042

Also, it is a good rule of thumb to run your signal cables on one side of the truck and your power cables on the other side.

 

I ran mine in the pass. side. Grommet below carpet on pass. floorboard. Rather easy to get it through...then down the door jamb, and into the back seat. Mine comes up through the carpet where the seatbelt goes through the carpet (hole already cut for seat belt.)

 

I just did my 2 weeks ago... I ran the power cable through the small grommet that is immediately behind your battery box. It's much easier to access it if you remove the battery. Just poke a small hole throught the grommet, then feed a wire clothes hanger through the grommet (from engine compartment into cab. you want the hanger to angle downward, that way it comes out under the dash right were the edge of the carpet is. Once the hanger is in the cab, attach the power cable, then pull the hanger & wire back into the engine compartment. Once I found the grommet, it was actually pretty simple.