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Old 05-13-2012, 09:19 AM   #1
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Dealer can't make Cooltech work with dealer towing package

Ok folks you seem to be my last resort in resolving this issue. Traded my underpowered 2011 Jeep for new Rubicon. Part of the deal was that dealer would remove Cooltech and base plates from 2011 and install on the 2012. They also installed a Chrysler hitch and towing harness for our ATV trailer. This is a round seven pin connection.

Our 2011 Wrangler had the factory hitch and wiring. This was a flat four connection. The Cooltech work flawlessly with the Jeep as a tow behind MH and as a tow vehicle. Since it had the factory harness we followed the Cooltech instructions and spliced the yellow wire into the 2011 as instructed.

On the new 2012, the Jeep dealer has been unable to make the Cooltech and the hitch/towing harness to work together. When first installed the Cooltech would work correctly with the MH. But the towing harness had no turn, running or brake lights on the right side of the ATV trailer.

I removed the left taillight on the 2012 and see that there is a small black module included in the dealer installed towing harness. I assume this is a diode pack. There was no such module on the factory towing harness in that location on the 2011.

Took it back to dealer for two days. They have the trailer lights working but the Cooltech is not. I have verified that I have power at the back of the MH and continuity in the flat four harness between MH and Jeep.

Cooltech will not return emails or telephone calls from me or the Service Manager. Never seen such poor customer service. Their answering machine says they check their machine and return calls. NOT!

Help! Taking the Jeep back to the dealer tomorrow. Since I have in writing they would install hitch, base plate and wiring, I can play hardball if needed. I'm going to give them two days more to play with it and then ask that they take it to a specialty shop that does wiring for motorhomes.
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Old 05-13-2012, 10:13 AM   #2
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If the dealer installed towing harness for your ATV trailer works properly, without the Cooltech harness, then probably the best way to solve this is to remove the Cooltech harness totally. Then install a separate wiring harness for the "toad" lights, using supplemental bulbs in the rear housings. Like the kit that Blue Ox sells.

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2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake
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