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Old 03-16-2016, 04:14 AM
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2011 Grand Cherokee Laredo trailer wiring

Hi all,
Its probably been asked, i can not find info on it. I installed a BTA towbar tonight and the next step is wiring it up for a 7 pin flat plug. Now ive looked high and low for a 7 pin flat wiring harness adapter like OEM. Unfortunately Hayman Reece only sell as a kit and the USA versions are 4 pin.
Has anyone spliced into the tail light wiring and ran and earth etc with no issues? Im worried about upsetting ECU or canbus (electrical isnt my forte)

Thanks in advance for assistance.

BTW I needed to buy the 2011 Jeep as my 2006 Jeep SRT8 was a complete nightmare with a drawbar for it.

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Old 03-16-2016, 09:20 AM
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Re: 2011 Grand Cherokee Laredo trailer wiring

Jeep does not recommend splicing into the lamp wiring for this application. In the US, all JGC have the factory harness so adding the electrical for towing is a matter of installing a pigtail to the connector under the rear bumper and having the dealer activate the wiring in the vehicle's computer system. (yes, they charge for that) From the context of your post, it sounds like you're somewhere else in the world, but you may want to check with your Jeep dealer to see if your vehicle is similarly equipped.
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Old 03-16-2016, 10:52 AM
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Re: 2011 Grand Cherokee Laredo trailer wiring

I have a 2012 that had no tow wiring at all. I don't know the sales codes, but apparently there is a towing package that includes everything (wiring and hitch receiver, along with other upgrades), then there is tow-ready package which includes unlit wiring under the rear bumper. Look around inside the rear bumper and you should see some wiring and a connector. If you have this, you are in luck. Just add a receiver/hitch and there is an adapter to adapt from this wiring harness to a 7-way and 4-way connector. You will need the dealer to enable the wiring by doing a flash. There should also be a plug socket under the dash to plug in a brake controller.

If you don't have a wiring harness under the bumper (like mine), it is much more complicated and if you DIY, consider it carefully; this could easily take a full weekend. The factory upgrade kit is here:
Wiring Harness #82212196AB
You can see the installation instructions there, too, which involves removing the TIPM . This requires a re-flash, too. I don't know if this kit includes a brake controller connector.

This vendor also has a factory hitch receiver that fits in the rear bumper if you don't want the aftermarket look.

I learned all of this after my installation, which is completely aftermarket. It cost a little less, but if I had known all this beforehand I would have gone factory upgrade on the wiring and the hitch and paid a couple/few hundred dollars more. Hope this helps someone else.
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