Power is best run directly from the battery. The power lines in the cab often do not carry sufficient, clean power. Just connect to the battery and route the wire through any available grommet or other opening in the firewall or drill and grommet a small hole in a safe location. As for antennas, it depends on what band radio you are running. for VHF/UHF, I drilled and mounted a small antenna on the roof im the middle near the tailgate. You can take the trim off around the healiner inside the tailgate and drop the headliner enough to allow you to drill and mount the antenna. I prefer the NMO mouting system. Other options for VHF/UHF would be a on the glass mount antenna that sticks to the side cargo windows. For HF, you'll need something bigger like maybe a trailer hitch mount or ball mount on the side.
my fan went out on my wifes 2003 jeep liberty. i just spliced a wire from the wiring harness to another wire that turned on when the car turned on and the fan turned on.
No such circuit exists.
AnswerGo to your local auto parts store and get a towing light kit. It will plug directly into your wire harness in the back of your jeep.
go to this web page http://www.modifiedlife.com/car-stereo-radio-wiring-diagram-and-wire-colors-2002-jeep-liberty/ there is list on right side for each model year and type of Jeep
This is Jim. Thanks but I finally got it off and the heater fan NOW works.
The wire runs under the Jeep and has probably rusted out or has a bad connection.
Two wire connector, only has one wire in it though.
connect it to the memory wire to the radio.
Issue was found to be a tack in the wiring harness under the floormat, damaged the red/blue wire.
A loose wire can cause a radio to stop working in a 2008 Jeep Wrangler. A blown fuse is another cause and can be fixed by replacing it.
http://www.installdr.com/Harnesses/DCP-Wiring.pdf
Your 2003 Chevrolet trailblazer radio probably cut though because of a loose or corroded ground wire. The positive wire may also be loose.