You buy a direct plug in kit from the Dealer.
Dead short in the trailer wiring or one of the trailer light sockets.
Trailer wiring harness part #118382 - any local Auto Parts Store should care this.
you do not need the extra 7 pin if your not running electri brakes
It is the round connector, with a cover over it, about 6 inches left of and about at the same level as the hitch receiver.
A 2007 Jeep Liberty does not have a cabin filter.
19.5 The 2007 Jeep Liberty holds 20.5 gallons
yes or no if your are towing a trailer or a boat.
The liberty is capable to towing up to 5,000lbs when properly equipped
No, Jeep is made be Chrysler.
Using the search term " 2004 jeep liberty wiring diagram" in Google, it displays an oversized image. If you click on the image, it goes to a website where you can save or print it.
buy the wiring kit from parts store then just plug it in
The trailer wiring kit is available from Jeep at about $125 and plugs into a wiring connector accessible through a panel in the left rear (inside) fender panel (behind the spare tire, near the left rear turn signal) with the trailer wiring harness routed through a grommet in the bottom of the compartment