ESS defaults to ON after each start (light off), press button (light on) to disable ESS. Scroll through EVIC screens, should tell you why ESS is not working.
It's in the EVIC Setup
Screen Setup Driver Selectable Items
Upper Left
None
Compass
Outside Temp
Time
Range To Empty
Average Econ (or L/100km, km/L)
Current Econ (or L/100km, km/L)
Trip A Distance
Trip B Distance
Center
None
Compass
Outside Temp
Time
Range to Empty
...
If you take the 76 to the the 79 you have the option of fueling at the La Jolla Trading Post, 22001 Hwy 76 Pauma Valley, CA 92061. Google maps says it's only 2 miles further, just a bit slower. Regular is currently $4.399. Lots of north county desert travelers stop there.
A little unhooking trick that was passed to me when I was having a difficult time removing the pins even though I was reasonably straight and level. If the pins are stiff/binding, set the parking brake on the jeep, start the engine and turn the steering wheel full left or right to loosen the...
If in stock configuration, YES. If Aux is bypassed, NO. You would have to connect the tender to the Main positive and the disconnected Aux negative and charge it separately.
Shifting the transfer case while stopped can be difficult, depending on how much it's been used. Although gently rocking the Jeep will usually make it much easier to shift. Might want to confirm it with the Tow truck driver, but I think I would leave the park released. They still have to get it...
So now your using 2 adapters, 4 to 7 and 7 to 6 and it's still not working. Why am I not surprised. You could have used a 4 to 6, but I'm sure that would not have worked either. Some basic troubleshooting will save you time and money. Slide the cover off the 6 pin trailer connector and look for...