Two batteries dead one after another.

[Hemisfear]

>> My 2 YJ's were under engineered pieces of crap!

I also have had two of them. They surely have their problems! But, for sure, they are not over-engineered - that is the issue at hand here! Though they are primitive as stone knives and bearskins to most today, their simplicity frees the owner from having to deal with all the unnecessary (and often unreasonable) complexity I find in my 6G Bronco. Sure, the YJ leaf-spring suspension is that of the 19th-century buckboard, but if I want to replace the rear brakes, I don't need the dealer to unlock the (electric) emergency brakes for me. If the windshield gets busted by flying gravel from a nearby truck, I can easily change it out myself AND not have to have the nanny sensors re-calibrated. The ancient YJ came with an actual oil pressure gauge. I don't even get that in my Bronco, which was a staggering $40K more! What gauges the YJ does have are all analog and easy to read - no menus or screens. Parts are cheap and readily available, with loads of available documentation. Aftermarket support is mature and massive.

Sure, you get wet driving them and can't hear the radio over the racket. You feel every crack and crown in the road. They are raw and authentic, short-wheelbase, 2-door, light-weight, manual transmission, scrappy little boogers that go over or through wherever you point them. In the beginning, wasn't that the whole point? Heck, my YJ doesn' t even have door locks.

I maintain that much of my 6G Bronco is decidedly over-engineered. Even so, I love mine, and at my age it will likely be my last new vehicle purchase. I'll take it on the longer drives and vacations. I pamper it. It is a 2-door manual, which is the primary criteria, and is as stripped as I can get it. It's a blast to drive, and folks I meet love to talk about it. But is it simple? No.

For the going-to-town vehicle, I'll fire up the ancient YJ. It runs on cheap gas. I can fix it myself. Taxes, tags and insurance are next to nothing. It doesn't yelp at me about not having my seat belts fastened or check if somebody is in the back seat. It stays on until I turn it off, and when I turn it off it really is off. Lastly: I'm not alone in this. The cost of good examples of the CJ and YJ series are exploding now, because people want them.

You see: their charm is in their simplicity; what you are calling their "under engineering." I can do another essay on the "piece of crap" accusation if you like...

Nope, I have to disagree, they are nothing but crap along with the CJ series as well! lol
After my experiences, I swore to never again purchase a Jeep product and never will, but you be you! lol

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[Oneand0]

Follow up. My battery came back with reverse polarity and they gave me a new one. Put the new one in and Im still having problems. No new add ons. I had a dual air compressor installed 2 1/2 years ago and a hidden winch 4 years ago. Nothing else electrical upgrades. No 12v fridge, I have a 2.4 kw old bluetti for that.

New battery giving me warning on my screen saying screen its shutting off screen to save power and to service soon. Other warnings to service electrical.

I drove it home from parents and parked it and disconnected new battery. I’ll make appointment with Ford and flat tow it there with truck and drop it off.

 

[brkdncr]

Pull your addons off.

Follow procedure to do a full bms charge and reset.

do an ammeter test to see how much power draw there is when powered off.

check your grounds.

 

[Brian_B]

Sounds like an alternator issue

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