Total Electrical Freakout, Dead Jeep [SOLVED]

[Ryanfold]

Looking for some advice, or seeing if anyone has run into this.

At a stop light and my 2019 Jeep JL 2dr's Auto Start freaks out, but the jeep starts again. I got a battery warning light, and an autostart icon with a ! next to it. Also, a warning on the main console says essentially "Pull your jeep over to a safe place, it will turn off soon"

I dont get that far tho. The battery voltage gauge looked like it went from 14-0 in about 5 seconds. The jeep died, and it wouldn't start again, but all the lights were flashing and windshield wipers are going. It's like it had a stroke!

Tested the Main Battery and got 12.7v. Not sure how to check the Aux Battery, and what the volts should be. I personally replaced batteries were replaced a year or two ago with quality replacements (Odyssey). Checked the wires attached to the main battery. The positive terminal clamp was a little loose, but I tightened it. wasn't ready to dig out the Aux battery on the side of a busy street. Just parked the jeep there for the night.

I got some codes before it died. P063A P2AF5 P2504 P00FD

There is a crazy days long wait at the dealership. Wondering if this is something I can fix, or a bigger electoral failure.

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[mrtm1970]

Did you replace the Aux battery when you said you replaced batteries?

Also if you have a bad alternator, no matter how new a battery is, it won’t get charged while in use.

 

[Ryanfold]

Did you replace the Aux battery when you said you replaced batteries?

Also if you have a bad alternator, no matter how new a battery is, it won’t get charged while in use.

Yep. Replaced the main with an Odyssey Battery and the Aux Battery with a Super Start Platinum.

Could be the Alternator, but seemed very sudden, and the the main battery still had a good reading. 12.7V

 

[Beachcomber72]

What Odyssey battery did you put in for the main? A single or dual setup? Also what engine do you have?

 

[Jebiruph]

Looks like a blown N3 fuse preventing the aux battery from charging. Move the wire from the N3 terminal to the N4 terminal and see if that fixes it.
https://www.jlwranglerforums.com/fo...on-and-ess-n3-fuse-warning.66247/post-1401203

 

[58Willys]

The 12.7 volt reading is both batteries. Separate the batteries, and test for voltage on each. Test alternator output. Reconnect main battery and check voltage between positive battery and a ground on the vehicle. Check all ground connections and cables. A fully charged battery should be 12.6 to 12.8 volts.

 

[Ryanfold]

What Odyssey battery did you put in for the main? A single or dual setup? Also what engine do you have?

Odyssey Battery ODP-AGM48H6L3 Performance Series Battery

Single Battery Setup, and it's a 3.6l

 

[Ryanfold]

Looks like a blown N3 fuse preventing the aux battery from charging. Move the wire from the N3 terminal to the N4 terminal and see if that fixes it.
https://www.jlwranglerforums.com/fo...on-and-ess-n3-fuse-warning.66247/post-1401203

Oh Crap, Awesome Advice!! thank you, I'll check it out. you rock!!

 

[four low]

The loose positive terminal might have been a factor in the problem too. A good voltage reading at rest, with no load, can be misleading. Load Testing will show if there are defects in the battery .

 

[Ryanfold]

The loose positive terminal might have been a factor in the problem too. A good voltage reading at rest, with no load, can be misleading. Load Testing will show if there are defects in the battery .

Thanks! i think a loose positive terminal caused the fuse to blow.

 

[Ryanfold]

Looks like a blown N3 fuse preventing the aux battery from charging. Move the wire from the N3 terminal to the N4 terminal and see if that fixes it.
https://www.jlwranglerforums.com/fo...on-and-ess-n3-fuse-warning.66247/post-1401203

That solved the problem! Thank you!

 

[mwilk012]

Thanks! i think a loose positive terminal caused the fuse to blow.

The fuse blows when you remove the positive lead from the aux battery and allow it to touch the body or any other short to ground.

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