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JPAloha

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Soooo, we’ve run into a small problem on our road trip…quite a big problem actually…..

Since we’re towing the teardrop long distance for the first time I thought I’d have off-road pages open to monitor fluid temperatures, etc. What I didn’t expect to see being an issue was the falling number on the battery voltage.
We stopped in some small town in southern Idaho around 4pm and had it checked at an O’reillys - I packed basic tools but not a multimeter - they confirmed my suspicions…the battery is fine but the heavy duty alternator is not. Their device said the voltage regulator is the likely suspect but that it’s internal on this alternator.

The end result of this is that we are stopped overnight in Provo (ironically at a hotel because all the campgrounds are full) with our voltage reading 12.8.
‘Nobody we called either has an a 240 amp alternator or knows if they might have one because we called after the parts dept. was closed. We also tried calling numerous Jeep dealers in Vegas (our next stop if we can make it) to see if this was covered by the extended warranty and if they had the part and could fit us in.

My question to all you lovely folks isn’t one I’m expecting a yes to but….does anyone have a spare HD alternator for a 3.6, 8AT, knows of one at a breakers yard or has some other means of getting one anywhere between Provo and Vegas?

Of all places, a Fiat dealership in Henderson can get one by Tuesday morning and has said they can install it if we want. I’m planning to phone our local dealership in Canada on Monday to ask about the warranty part. All this is well and good but means two things:
1. We have to hope it makes it to Vegas without needing a tow.
2. Our plans to head out to Death Valley have to be cancelled because we can’t trust the Jeep to keep going and a mechanical failure of any kind in that environment could be deadly.
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Lateapex

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If you haven’t already done so, you might try:

Stephen Wade CDJR (St. George, Utah) 435-375-4755
Cedar City CDJR (Cedar City, Utah) 435-572-7240

Both of these are/can be along your route.
 

jaymz

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I’m not sure I’d trust a diagnosis from O’Reilly Auto Parts.
 

gsbrockman

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Occasionally....a failing battery will reject a charge from the alternator.

I‘d consider having the battery properly load tested.
 

Lateapex

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Not really what you asked…but…

If you need to ”wait out” the long weekend for your “new” alternator, or want a replacement adventure for Death Valley, consider the Zion area. Amazing scenery, fabulous hiking opportunities, and many other outdoor recreation activities. Not too far from Provo, and a 2-3 hour drive to Vegas.

I recently stayed at Zion Ponderosa (near the parks East entrance), and had a great time exploring the area. Also, much as I have enjoyed Death Valley on a couple of occasions, I would go there in the cooler months.

Oh, and I second @gsbrockman ‘s idea on the battery test.
 

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calemasters

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Soooo, we’ve run into a small problem on our road trip…quite a big problem actually…..

Since we’re towing the teardrop long distance for the first time I thought I’d have off-road pages open to monitor fluid temperatures, etc. What I didn’t expect to see being an issue was the falling number on the battery voltage.
We stopped in some small town in southern Idaho around 4pm and had it checked at an O’reillys - I packed basic tools but not a multimeter - they confirmed my suspicions…the battery is fine but the heavy duty alternator is not. Their device said the voltage regulator is the likely suspect but that it’s internal on this alternator.

The end result of this is that we are stopped overnight in Provo (ironically at a hotel because all the campgrounds are full) with our voltage reading 12.8.
‘Nobody we called either has an a 240 amp alternator or knows if they might have one because we called after the parts dept. was closed. We also tried calling numerous Jeep dealers in Vegas (our next stop if we can make it) to see if this was covered by the extended warranty and if they had the part and could fit us in.

My question to all you lovely folks isn’t one I’m expecting a yes to but….does anyone have a spare HD alternator for a 3.6, 8AT, knows of one at a breakers yard or has some other means of getting one anywhere between Provo and Vegas?

Of all places, a Fiat dealership in Henderson can get one by Tuesday morning and has said they can install it if we want. I’m planning to phone our local dealership in Canada on Monday to ask about the warranty part. All this is well and good but means two things:
1. We have to hope it makes it to Vegas without needing a tow.
2. Our plans to head out to Death Valley have to be cancelled because we can’t trust the Jeep to keep going and a mechanical failure of any kind in that environment could be deadly.

I had a very similar issue with my 2021 JLUR. I replaced "both" batteries and the Jeep has been perfect since. I also replaced my battery sensor P/N 68289207AC.
 
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JPAloha

JPAloha

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Thank you all for the prompt replies, it’s very much appreciated!!

I’ve also been reading this old thread and wonder if this is what I’m seeing….
https://www.jlwranglerforums.com/forum/threads/my-testing-of-the-ibs-ibm-system.79412/

My JL often sits for days, weeks, sometimes months without heading outside the garage (I work from home and we have three Jeeps so this has become the summer toy for the most part). I’m used to seeing 14.x as the voltage reading when I do look at it. This also fits my old school logic and experience with classic cars, etc.
‘Having read the thread above I’m wondering if my batteries are just fully charged and this IBS gizmo is doing its thing. This could also fool the test device that is maybe not geared up for such a thing.
My old school brain has been wondering why the battery has appeared to be discharging but has made it well over 1000km since we left home yesterday afternoon.

Some second opinions would be welcomed.

Thanks again to all who replied so far - I don’t often ask for help (in life in general as it happens) so when I do and I see people offering their thoughts and ideas it makes me glad to be part of this community.
 

aldo98229

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Sorry to hear about your troubles.

All I can say is: STAY AWAY FROM Provo CDJR. They are a bunch of thieves!
 

zouch

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@JPAloha
i'm not convinced you have an alternator problem.
if the folks that "tested" your charing system didn't disconnect the Auxillary battery while doing their "testing", there's no telling what they were seeing.

if those are the original batteries in your 2019, you've done better than many people already, and when those things start to go bad, you can get all kinds of strange behaviors.
i'd suggest you try replacing both (not just one!) of the batts and re-setting the IBS and see if you actually have a problem. quicker/cheaper/easier than dealing with putting a new alternator in, and if you got over 3 years out of your stock batts you're already doing better than average.

i hope it's this simple for you, and you have a great trip! DV should be beautiful this time of year.
 

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JPAloha

JPAloha

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Thanks for the additional replies.

These are both the original batteries, we have just turned 39,000km on this trip and the Jeep spent the first three years in a heated garage (last year we sold our place and rented in a new town to see if we liked it - the rental has a garage but it is neither heated nor insulated). It is possible the winter May have damaged the battery cells.

The person testing did not disconnect the Aux battery and it did not occur to me at the time (stress of a potential issue on day 2 of a 2 week trip is my only excuse).

I’m thinking the diagnosis may be incorrect and will try a quick “experiment” to turn a bunch of things on briefly to see if the IBS tells the alternator to send more power.
 
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JPAloha

JPAloha

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Started first time and showing 14.3v out of the gate. Something we’ll keep our eye on but hoping this means we’re in good shape.

Jeep Wrangler JL Assistance required…. IMG_6382
 

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I'd bypass your aux battery and see if that's fixes everything. My aux battery on my 19 went after about 3 years. I've been wheeling now twice and had to help people remove theirs because it was causing issues. I make sure and carry a 7mm socket with me now in my tool bag lol.
 

Bill_P

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Can't tell you..shhh
If it were me I think, since you are showing the start of an issue, I would replace the primary battery and delete the aux until I could get a proper altenator test done. Like others have said, if you're on the original batteries you're above average and you damned sure don't want a primary failure on the trail. Just my .02c.
 

aldo98229

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I’d say, based on the collective experiences on here, including mine, that it is 99% probable it is just a bad battery.

Happy traveling.
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