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Old 01-20-2014, 05:03 PM   #1
ATCNastyNate
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Jeep Grand Cherokee question

I have a 2012 Jeep Grand Cherokee. Did not come with a stock tow package. I am starting to do track days this year, so I threw on a hitch. The Jeep has a trailer connector cord run to the back, under the bumper. So I bought a trailer, hooked it up...and no lights. I did some research and apparently I need to take it back to the dealer, to have them flash some missing component into my car. I guess because my Jeep didn't come with stock tow package, it doesn't have something, which enables the factory installed trailer wiring to work correctly. Just wondering if anyone else has run into this problem, and if so, which dealership fixed it for you, and how much did those bloodsuckers charge you? I'm really going to be frustrated if they decide to charge me an arm and a leg for something that should have been activated/turned on at the time of purchase. Ugh...first world problems. THANKS!!!
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Old 01-20-2014, 05:04 PM   #2
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You have like a brand new jeep, I feel like they should do that for free..
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Old 01-20-2014, 05:05 PM   #3
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Thats some silly sounding . I dont see how you would have any wiring installed without the tow pkg. Ive always had to buy an adapter that plugs inline
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Old 01-20-2014, 05:06 PM   #4
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no factory hitch but had a trailer lights hook up installed? Get a meter first, then trace back the wires. The wiring should be piggy backed off the tail lights therefore already hott and not requiring some reprogram....at least from what Ive seen



http://www.etrailer.com/tv-install-t...ee-118425.aspx
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Old 01-20-2014, 05:20 PM   #5
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I looked in alldata for this vhicle and I dont see anyting about reprograming anything. It does however say that tht wiring for the rear lights is on the bus and the wires are used for other things(so splicing a universal one in would not be a good idea) , and alldata says that ones with factory installed have two relays in the tipm(fuse box) trailer/tow R and trailer/tow L. hope this helps a little
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Old 01-20-2014, 05:20 PM   #6
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listen to what this guy says at the end up the video. This is what my problem is, using the same equipment.

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Old 01-20-2014, 05:23 PM   #7
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And my Jeep already had the fuse installed which he referred to as well. Tried swapping out fuses to make sure that wasn't the problem. So dumb that I have to go back and have reflashed! I called the dealership I got it from, and they had no idea what I was talking about...so I made an appointment.
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Old 01-20-2014, 05:37 PM   #8
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When i worked for Chrysler i remember re flashing the TIPM to enable trailer wiring to a dealer installed option or something to that affect. I also have a 2012 WK2 but its a 4x4 overland with factory installed towing. Hope that helps!
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Old 01-21-2014, 04:52 PM   #9
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Service guy at Gulf Gate Dodge/Jeep called me back today after talking with some of his technicians. And like I suggested and SuperDave mentioned, my Jeep needs a re flash to allow the trailer lights to work correctly. After talking with him a bit, he said they would take care of it free of charge. Woo!!

And SuperDave, why is it called a WK2? I saw that all over the forums, and obviously I don't understand so please enlighten me! =)
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Old 01-22-2014, 04:27 AM   #10
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Good to know since I will be needing this done sometime this year on my 2014 JGC.
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Old 01-22-2014, 09:40 AM   #11
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Quote:
Originally Posted by ATCNastyNate View Post
Service guy at Gulf Gate Dodge/Jeep called me back today after talking with some of his technicians. And like I suggested and SuperDave mentioned, my Jeep needs a re flash to allow the trailer lights to work correctly. After talking with him a bit, he said they would take care of it free of charge. Woo!!

And SuperDave, why is it called a WK2? I saw that all over the forums, and obviously I don't understand so please enlighten me! =)
WK2 is the fourth generation GC. Heres a link with a breakdown.

http://en.wikipedia.org/wiki/Jeep_Grand_Cherokee
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