Well from the symptom it gave me this morning, I'm thinking it may be more of a starter or solenoid issue than a battery/charging issue.
It tried to not start again this morning. It clicked once, I turned it off & then I tried again and it started. My OBD+Link app says that the battery was at 13.9 when the truck is running.
I'm talking a little more with Michael Jefferson, we think from all of the water we were running through in Moab, and all of the puddles that Vixen is drawn to like a bug to a porch light, the starter or starter solenoid may have gotten water in where it shouldn't be.
What's your best suggestion for purchasing an OEM starter for a 19 4Runner?
Michael also mentioned that there are two starter options for my year truck. One being more heavy duty than the other. Does anyone have any insight into that topic? I think I'd prefer the heavy duty version.