Thank you for the reply.
The problem started before the battery changeout. The main battery was at 11.5V
Bought Jeep new in 2020.
I went through the fender to change the start/stop battery. Both batteries were fully charged before installing. Disconnected both batteries, 1st the negatives...
Mr_Bill, The tow truck guy came up tonight and in the process recognized there were no break lights. We could not find the brake light fuse in the manual/online or the "Mechanics link" he has on his device. We pressed and wiggled all the fuses and not knowing which one it was, the brake lights...
‘20 Gladiator main battery was on its way out. Replaced and it starts but shows all codes stop/ start, service shifter/transmission/antilock. With all that the shifter is locked in place.
Replaced small battery though it still metered good. Now it will start on third try and continues to show...