I was installing an amp power wire through the firewall of my 2011 f150 and I was fishing wire under the passenger side dash when I noticed a weird rubbery orange tube that runs out to the wheel well area. What is this? It is held in place well with a rubber nipple at the end at the side wall.

 

you have a sun roof? probably the drain line

 

Looks like the factory wire for your stereo antenna. They're usually orange or yellow.

 

This makes me curious too.

 

Could be the A/C Evaporator drain line but i would be interested to know for sure.

 

that was my first guess

what's on the other side of the fire wall, under the hood?

 

The line doesn't come out on the other side of the firewall it comes out the passenger side of the truck but in an area I can't see between the outside skin and the inside probably below the 5.0 badge I thought maybe a drainline too but ac drain usually looks like it drips from near the middle of the truck when I am backing up

 

Like I said before, it's the wire lead for your radio antenna that's mounted to the passenger side of your truck. Your A/C drain runs through the firewall.

 

Camping on fasttimez's what he is trying to tell youz: here is shot of where it terminates at back of head unit:

 

cool thanks. I guess they just want to keep water from coming in on that line