you "may" find this helpful...
don't know why, but, be gentle if you reply.
These are not uncommon problems that you've all described, and MANY of us have had the same issues, and right away, we ALL have thought, why me, why MY WK??..how come it comes up with these weird and untenable issues with it's electrical systems.
What did it for me, was the "service 4wd" issue...service what??...I too got the recall notice to reflash the all wheel drive module, and hesitated, as I have done a FULL ECU performance upgrade with a great performance shop in Oakville, and it's NOT uncommon for dealerships to COMPLETELY ignore your request/demand, to NOT touch the ECU in their "wisdom".
I did some digging...seems a common thread was the lack of continuity in the power supply in the vehicle.
We ALL have stories about our batteries, what we got, where we got it, how much we "saved" by getting one at some mysterious "bargain" location, or on sale, or "whatever.
This past year, my 2008 WK CRD was STILL running the same battery...lasted a long time in MY books, and just as a "preventative" measure, I thought..."what the hell, it's time for a new battery"...don't ask me why?....I LIKE long lasting "everythings" when I buy them...cheaper is NOT better in the long run!
I picked up a: Year: 2008
Make: Jeep
Model: Grand Cherokee
Engine: 3.0 Liters 182 CID V6
Model #: PC1350
BCI #: 49
Install Notes: No specific installation notes
Battery made by Odyssey, from a great battery dealer in Hamilton, well made, great reputation, and kinda expensive!!
Within 3 days, all my WK "troubles" seemed to miraculously vanish...INCLUDING my "service 4wd" message......how can this be??...le's just say in MY case...it COULD be, and it seemed to be, and for now, I'm going to leave it be!