I have an '06 Lariat and was told that a subwoofer harness was under the rear seat, but I can't seem to find it. I have the audiophile premium sound in the truck, but don't know if it comes with all F-150's or not. If not, where can I find a wire?

 

I have a 2006 F-150 and I didn't see a plug either.

I just ran a new power wire and all, its not hard.

 

It's on the driver side under the rear seat right next to the bracket. It is a PITA to find but it is there. It's got a plug on it that is about 1/2"x1". I used it for ground and switched lead. I ran a power line to the battery and ran my RCA's down the center of the truck to the back of the HU.