Good points - I wasn't aware of the ESS high capacity fuse. My other question is why the vehicle won't jump start with a dead Aux? Is it because I truly bad Aux, that is maybe shorted, sucks all the power away thus not letting the main charge up to start? Because why not just disconnect the Aux and get an ESS error?Sorry I missed all the activity on this thread, I was busy buying a Gladiator.
@cbrenthus , I think you're mostly right on everything. Unplugging the PCR is mostly the same as using the jumper. But if the ESS high capacity fuse is blown, unplugging the PCR won't help, but the jumper will. The jumper also makes it easier to go back and forth by just installing/removing the fuse as opposed to crawling under the jeep to unplu/plug in the PCR.
The problem the fused jumper solves is when a bad aux battery can't be jump started. Early on, people were getting towed to the dealer for a dead battery. It wasn't until several months later that it was found that unplugging the PCR could also work. Since I have a fused jumper, I still prefer the jumper as opposed to crawling underneath to unplug the PCR.
I'm imagining the JT ESS will be identical, since it is the same system as the Pacifica as well.