I just went through everything again. checked the aux battery and it is connected properly and it read 12.63 volts. Checked the module and didn’t see any bent / broken pins. Reinstalled and everything went together smoothly So it seemed.Mike,
Whether or not you're a big Electronic Stop Start fan, the design and implementation of ESS has really complicated the JL ignition system. The most obvious first step is checking the charge on the AUX (smaller) battery. The AUX battery must be of sufficient charge to enable a pre-start relay. This pre-start relay does not engage the starter motor directly but rather closes a secondary circuit which allows the main battery to then engage the starter. It sounds like you're missing this first circuit step.
Are their any hints on the cluster?
Have you tried jump starting? If so, did you leave the jumper cables connected for many minutes before attempting to crank? Recall, these two batteries are connected in parallel. The Main will likely take most of the charging energy up-front, but it's the AUX battery that must be charged in order for the Jeep to start. This will require some charging time.
Lastly, double check all the connections and make sure all the fuse and relays are pushed firmly down and that they make good connections within the fuse and relay module. This is the most likely culprit because you have to move this module out of the way just to gain access to the AUX battery.
Don't panic. Everything was working. It's just now a matter of ensuring everything has been put back together and has sufficient charge on the new batteries. New batteries are not always received fully charged.
You'll get there...
Jay
OK, one more captain obvious question and I apologize up-front for it being so stupid (I'm embarrassed); the fridge isn't running while you're not using the Jeep is it? Do you ever forget to turn it off? Fridge applications tend to want their own power source independent of the vehicle (i.e. it's own battery).I had a dead battery a few times because of the ARB fridge that was left on and also I was leaving the FOB in the Jeep. It is not a daily driver and may sit for up to two weeks. I literally cranked the Jeep and backed in the garage. Changed the batteries and now nothing
Yes the fridge is wired to the main battery and has been for almost a year and I have left if on in low power shutoff a few times which has run the battery down until the Jeep will not crank. The Jeep is not acting like it is low battery. It is acting as if the main 12v battery is not connected even though it is.
I can't tell from the angle of this picture but there is a battery sensor directly under the top strap in your picture. Is it plugged in?
I'm really stuck. I'm voting for the original batteries just to see what's up. I haven't removed my batteries but every year I've had before had a sensor under the battery to monitor temp. Did you see anything like that when making the change?It is plugged in. I even swapped them from the other JL with no luck.