Just like said above, you can go to pretty much any car audio store and you can get a High/Low Converter. Best bet is to connect it to the rear speakers. You would Make a Y connection so you have the feed from the head unit but than brances off into the high low converter but still goes to the speaker so it continues playing it stuff. On the other end of the converter are the RCA Outputs, so you can hook up the Left/Right audio to that and than run that to the back of the sub. And the remote, you can run that to anything that has powere really but best bet is somethin that is ACC Switch, you can also connect that to the speaker if you want. So pretty much everythin that mjktg99 said is correct but I know people like getting a few options but his way is the best say.
00 White Ranger XLT Extended Cab
Truck has sorta went back to stock but still have
03 Sport Trac Cluster, 5% Tint Rear 20% Front, Auto Lamp and Dim Mirror.
6000K HID Conversion Kit, 2/3 Eibach Lowering Suspension, Billet Grill