Jeep 2008 unlimted trailer wiring

Sounds like a diesel. Glow plugs usually need to be warmed up before starting an engine. Smaller diesels either warm up quicker or it is less critical than a tractor trailer. So either your glow plug light is normal letting you know it needs time to warm up or it's letting you know they are weak and need to be replaced. I'd check the owners manual to be sure.

The Left Turn signal is DARK GREEN/RED
The Right Turn signal is WHITE/YELLOW
The Left Brake light is WHITE/ORANGE
The Right Brake is WHITE/RED
The High-Mount Brake lamp is DARK GREEN/WHITE

Now, with all that said, your Jeep should be already equipped with trailer wiring unless you have the cheapest model of Jeep Liberty available. I would check your Owner's Manual on the subject.

Also, your rear lighting is controlled by the Body Control Module (BCM) and the signal and brake inputs/outputs are all transmitted to the Instrument Cluster Module for your lamp-out warning system. Anything you connect to this wiring can adversely affect BCM function or can cause your lamp out warning to malfunction and come on all the time. I would use extreme caution unless you really want to destroy some HIGH DOLLAR electronics in your vehicle.

This is the OEM / Factory set up for trailers from my 1990 FSM. Note that they used a flat-5 connector instead of the typical flat-4 plug that 99% of the known universe uses. I don't know if newer XJ's came with the flat-4... The 7-conductor schematic is typical although you'll find that some agricultural / horse trailers are wired differently (click image for zoom)...


Here's a scan of the "instruction sheet" that came with my utility trailer's flat-4 wiring kit. (Retouched for clarity.)




Hope this helps.

I tow my 2005 Jeep Wrangler behind my motor home. I installed a Jeep trailer towing wiring kit to the rear lights. the bought a long trailer wiring kit and ran it from the front of the Jeep to the Jeep tralier wire plug. Pluged it in and pluged the other end into the motor home trailer light recptacle. I used only four wires plus ground. There is probably a way you could tap into the wiring harnes under the hood but not having a wiring diagram this is the best I could come up with and all lights do work. You can buy a test plug with led lights that plugs in both male and female, real handy for checking connections.

Also try http://www.etrailer.com/faq-wiring.aspx. They have easy to follow directions and color codes. Plus you can order anything you might need. Hope this helps.

http://www.accessconnect.com/trailer_wiring_diagram.htm
this might help ya its what i found when i googled it

Review this post, Wiring harnesses & adaptors

Good luck (remember rated this help).

some times the tailers come with diffent wiring move some wires aroud