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This is a long shot, but figured it does not hurt to ask.  Just bought a '20 Grand Cherokee  to tow and was aware before I purchased it that from '18-'21 you can very easily get a death wobble because of the electronic power steering.  The fix per se is an upgraded wiring harness that keeps power to the steering only while towing so that it can moderate why hydraulic does naturally.  Question number one is are there any members here who successfully had that upgraded harness installed and where did you have it done?  Oddly enough if you called 10 Jeep dealers and asked to talk to the service manager at least 9 of them would say they have no clue what you're talking about and even if they do know they most likely don't have a tech that truly understands how it works as the instructions from Jeep SUCK and are not correct.  Harness still works as it should IF it's installed properly, but it's not for just something a run of the mill tech can handle.  Thought I had this all figured out as Jon Wehrenberg over at Prevost Community went through the gauntlet with his '21 and ended up working with senior management at Jeep before it was all over and along with an amazing mechanic it works to perfection along with a little custom coding required as Jeep botched that as well with the new harness and how it interacted with the steering right after disconnecting from coach.  My best laid plans may have went to crap as I planned to use his tech and dealer, but lo and behold that tech got a better job with the county.  Still might be a work around with him, but I'm looking for other options just in case.

Second question is does anyone have a preferred battery charger that is smart for the of a better term as the steering system uses quite a bit of juice and will drain the battery in short order.  Need something that will not overcharge the Jeep battery.  I believe Jon used something from Victron, but it was I believe 24V because of the Prevost.  Hopefully that a all made sense.