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Eternity

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That is what it felt like this morning.

'21 Diesel

On the Oregon coast, damp, cool, foggy. I've had a problem over the last couple days when randomly I'd come back the Jeep and the battery was dead. Jumped it, ran it to charge. Later, started fine, started fine again, drove again, stopped, 1hr later, dead. Not an old battery just got it in June.

Now, this morning, it needed a jump, went to breakfast with friends, got in and it barely started after 1 hour, but it did. I had 1 gallon of gas left, so I calmly began to drive down the road doing about 30mph and a few blocks later, I heard a sound underneath and felt a little shudder like I dropped a rock or stick. Didn't think to much of it but about 10 seconds later, the engine simply sputtered and died. I still have fuel. It started and ran for about 20 seconds, sputtered and died. was barely able to roll it back off the road and now it would start for 2 seconds and shut off.

Now after start and start, the battery is getting tired. I put a jumper battery on, still only 1 second of run. But, wait, there's more!!!!

Now, all hell brakes loose. The dash start looking possessed with everything blinking and flashing. Go out to the fuse box and the relays sound like they are clicking on and off to a rock n roll song as the drums. I figure, disconnect everything and perhaps reset it. So, all batteries disconnected completely. Plug back in and still, it will start for a second and die. All random errors show up, anti-lock, power steering, water in fuel, you name it everything is error flashing.

Try again and again with the complete disconnect to reset, now the entire row on the gear shift from Park downward are bright orange. Can't even go to aux to roll up the window. Then, oh yes, there's even more, it starts to say that there is no keyfob and to press the start with it. I do, and nothing.

Did the brains get fried? Is there something like this someone has come across and knows what it is. I was just leaving an RV campground and brought my motorhome back to the street and connected it up and dragged it down to the next campground (yes, in N on diff....fortunately Jeep allows that to shift without power). Able to push it into our new campground spot, but dead, dead, dead.

Any ideas or experience?
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That is what it felt like this morning.

'21 Diesel

On the Oregon coast, damp, cool, foggy. I've had a problem over the last couple days when randomly I'd come back the Jeep and the battery was dead. Jumped it, ran it to charge. Later, started fine, started fine again, drove again, stopped, 1hr later, dead. Not an old battery just got it in June.

Now, this morning, it needed a jump, went to breakfast with friends, got in and it barely started after 1 hour, but it did. I had 1 gallon of gas left, so I calmly began to drive down the road doing about 30mph and a few blocks later, I heard a sound underneath and felt a little shudder like I dropped a rock or stick. Didn't think to much of it but about 10 seconds later, the engine simply sputtered and died. I still have fuel. It started and ran for about 20 seconds, sputtered and died. was barely able to roll it back off the road and now it would start for 2 seconds and shut off.

Now after start and start, the battery is getting tired. I put a jumper battery on, still only 1 second of run. But, wait, there's more!!!!

Now, all hell brakes loose. The dash start looking possessed with everything blinking and flashing. Go out to the fuse box and the relays sound like they are clicking on and off to a rock n roll song as the drums. I figure, disconnect everything and perhaps reset it. So, all batteries disconnected completely. Plug back in and still, it will start for a second and die. All random errors show up, anti-lock, power steering, water in fuel, you name it everything is error flashing.

Try again and again with the complete disconnect to reset, now the entire row on the gear shift from Park downward are bright orange. Can't even go to aux to roll up the window. Then, oh yes, there's even more, it starts to say that there is no keyfob and to press the start with it. I do, and nothing.

Did the brains get fried? Is there something like this someone has come across and knows what it is. I was just leaving an RV campground and brought my motorhome back to the street and connected it up and dragged it down to the next campground (yes, in N on diff....fortunately Jeep allows that to shift without power). Able to push it into our new campground spot, but dead, dead, dead.

Any ideas or experience?
I do believe that the diesel has dual batteries like the gas, just a lot easier to get to
 
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Eternity

Eternity

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I do believe that the diesel has dual batteries like the gas, just a lot easier to get to
Yes it does. I use that as a jump start battery as I keep the auto-stop/start off with a Tazer. With or without that, the whole rig is now active beyond strange. Even had a friend come over and direct jump, but everything is going crazy.
 

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Yes it does. I use that as a jump start battery as I keep the auto-stop/start off with a Tazer. With or without that, the whole rig is now active beyond strange. Even had a friend come over and direct jump, but everything is going crazy.
Using tazer does not take second battery out of the loop just turns off ess, Sounds like you blew the maxi fuse array at the end of the fuse box using the small battery as a jumper
 
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I think you have a bad battery (or two).
 

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Only a gallon of fuel left? WTF you crazy man! Sounds like it might have destroyed the fuel pump ⛽ 😞 I hope not but possibly.
 
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Eternity

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Using tazer does not take second battery out of the loop just turns off ess, Sounds like you blew the maxi fuse array at the end of the fuse box using the small battery as a jumper
I'll look into that.

Yeah, since I didn't need the second battery constantly with the start/stop, I actually disconnected it and ran it through a separate solenoid on the negative side...totally disconnected from everything. I then added a voltage sensing switch that only connects the negative when voltage is above 13v....to keep the second battery changed. Then, if ever something happens and the battery dies, I have that second battery always fully charged and ready with the flip of a switch to be exactly the same as most battery jumpers you buy. It has worked really, really well and kinda cool.

In this scenario, I didn't see any problems, but I will check that fuse, which I wasn't really thinking could be a problem. To me, it was looking like the computer was scrambled. I will check that fuse and then replace. I assume just checking resistance across each is enough to determine.
 
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Eternity

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Only a gallon of fuel left? WTF you crazy man! Sounds like it might have destroyed the fuel pump ⛽ 😞 I hope not but possibly.
Funny!!! I don't crawl up rocks in narrow washes but I got only a gallon left and I'm the crazy Jeep owner....hehe
 

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Funny!!! I don't crawl up rocks in narrow washes but I got only a gallon left and I'm the crazy Jeep owner....hehe
Super low fuel in a diesel, any diesel, is risky. Air In the lines can damage the pump quickly.
 
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Eternity

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Actually, that reminds me of a recall. There is a fuel pump recall on the Jeep. When I got the notice a few years ago, I called the dealer and they already knew what I was going to ask for as if all diesel owners were calling that day. He said the parts are not available and no idea when. Call a year later and the same thing.

That could explain the clunk sound and then fuel starvation shortly thereafter and unable to start or stay running. That also could have blown the fuses, perhaps? Did order the main fuse to the PDC....there was one that was blown.

Thanks for all the ideas and jogging my memory. Now to figure out how to get it to the Jeep dealer.
 

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Yeah, since I didn't need the second battery constantly with the start/stop, I actually disconnected it and ran it through a separate solenoid on the negative side...totally disconnected from everything. I then added a voltage sensing switch that only connects the negative when voltage is above 13v....to keep the second battery changed. Then, if ever something happens and the battery dies, I have that second battery always fully charged and ready with the flip of a switch to be exactly the same as most battery jumpers you buy. It has worked really, really well and kinda cool.
You realize that if your crank battery is fully charged your alternator may not go over 13 volts and that small battery may actually NOT be charging correctly.
If it's staying over 13 all the time then the main battery isn't really healthy. And unless it's driven a lot - frequently and for long drives, I'd just about bet that battery isn't staying fully charged.

In other words -
12.8 is fully charged. Unless each battery is there, or at least above 12.6, they aren't fully charged.
If the main is fully charged, the alternator kicks out and may not charge the second battery.
 

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My wife had a car that refused to even try to start when the fuel was that low.
 

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I had an 80 or 81 F150 that one I was driving home from work one night and one by one, EVERY electronic device came on. Lights, wipers, windshield washer... then one by one turned off.
I pulled into my driveway with no lights at all and it died before I even made it all the way to the house.
Too late, went to bed. Deal with it on the morning.
Go out in the morning, everything works fine.
Nope, not dealing with that!
Gave it to my cousin who wanted just the engine for his much better shape but higher mileage truck. He thought I was crazy, but then it did the same to him driving it to his house, except it died a block away.
 
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Eternity

Eternity

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You realize that if your crank battery is fully charged your alternator may not go over 13 volts and that small battery may actually NOT be charging correctly.
If it's staying over 13 all the time then the main battery isn't really healthy. And unless it's driven a lot - frequently and for long drives, I'd just about bet that battery isn't staying fully charged.

In other words -
12.8 is fully charged. Unless each battery is there, or at least above 12.6, they aren't fully charged.
If the main is fully charged, the alternator kicks out and may not charge the second battery.
Yup. I do understand the electronics involved quite well. The switch I installed, is selectable, adjustable has NO and NC for both above and below settings. This is not a cheap Chinese thing. It has an indicator light to show when it is active and not. So, I can have the car off and see that it is not on. I can turn the car on, test and see the voltage and the switch is on. It has worked REALLY well and is very cool.

I posted what I believe this is all about...a recall I had forgotten about which the dealers said they wouldn't fix unless there was a problem someday. It all adds up.
 

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Yup. I do understand the electronics involved quite well. The switch I installed, is selectable, adjustable has NO and NC for both above and below settings. This is not a cheap Chinese thing. It has an indicator light to show when it is active and not. So, I can have the car off and see that it is not on. I can turn the car on, test and see the voltage and the switch is on. It has worked REALLY well and is very cool.

I posted what I believe this is all about...a recall I had forgotten about which the dealers said they wouldn't fix unless there was a problem someday. It all adds up.
Any dealer that said they won't do the fuel pump recall unless there is a problem are morons. If your fuel pump really did fail, they have to replace the whole fuel system now, not just the pump.
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