Voltage regulation comes from the PCM, not the alternator and the state of charge is monitored by the IBS which is connected to the negative side of the battery. In your case it is most likely your batteries as I have a 2017 DD GT (had its original batteries) and I replaced both batteries several months ago as I was getting "battery protection" warnings during cool weather (ESS would almost never activate). Both batteries checked out good but after replacement I no longer get the warning. In my case, my commute is only 12 miles round trip so the batteries don't get much of a chance to fully recharge so about once a month I use a battery charger to top them off.
One thing you might want to do is check the fuses.
There are fuses at the + jumper post.
So its been a year since I've purchased my 2018 Durango GT. Haven't had a single issue.. then the battery died on me. I put plugged the truck to charge but quickly noticed that the battery wasn't holding the charge and kept loosing volts. my dealer warranty had expired so I went to replace the...
www.dodgedurango.net
And one in the battery compartment.
So its been a year since I've purchased my 2018 Durango GT. Haven't had a single issue.. then the battery died on me. I put plugged the truck to charge but quickly noticed that the battery wasn't holding the charge and kept loosing volts. my dealer warranty had expired so I went to replace the...
www.dodgedurango.net