I'm about to buy a subwoofer with a harness but I have no clue what the harness looks like. I have a pic of a subwoofer below does that have the harness because it doesn't look like the one at Subaruparts.com

The harness from my research is the important part because without it I can't connect it to the HU.

In the instruction manual: http://www.subaruparts.com/guides/44S_Subwoofer_IxI.pdf

Is the harness the long wire seen in picture 13? If not, does that come with the car? Or is the harness the one shown in the pic between 14 and 15 and is circled with dotted lines? Thanks!

 

the pic looks like it comes with all the wires. the wire that runs to the sub runs up to the dash connecting to a harness that fits between the stock harness and the back of the radio. think of that harness as an extension of the factory harness with a smaller harness that runs down to the sub.
i am not 100% on this as i have never seen a factory sub but just from the pic it seems like everything is in place.
i don't know whats up with the second pic. i cant really make out what that is. the pic doesn't expand.

 

i found this on Nasioc. it might be of interest to you.
http://forums.nasioc.com/forums/showthread.php?t=735683
talks about the sub harness at the bottom