pdale44
Member
- First Name
- Richard
- Joined
- Jan 4, 2020
- Threads
- 1
- Messages
- 12
- Reaction score
- 3
- Location
- Lancaster, CA
- Vehicle(s)
- 2019 Jeep Wrangler Sport S
- Thread starter
- #1
I have a 2019 JL Sport S 3.6L manual 50,000 miles. I’m trying to identify a low voltage issue. This is my first vehicle with two batteries so I’m not sure if the aux battery is at fault or not. I have had the battery too low to start the Jeep once. It jumped just fine and I had thought we must have left a door open or something on. A week later now it is starting slowly. This morning the voltage was 11.5 before starting. It did start but not as fast as normal. Now at idle and revving the voltage readout on the cluster is 12.6-12.7. My experience says this should be higher if the battery is drained, the alternator should be working overtime to charge it and probably be in the 14.x range. But I’m wondering if it is that high coming out of the alternator but that second battery is pulling it down and causing the low reading on the cluster? Anyone have any insight or run into the same issue? I have seen that the aux batteries go bad and pull the main battery down with it. But it’s the low voltage reading throwing me for a loop here. Any help is appreciated, thanks.
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