Auxilary disabled

[mossyoak1967]

Could someone help me out. I decided to bypass my auxiliary battery and looked at different YouTube videos. I decided to disconnect the negative cable and remove the fuse as shown. My auto/start stop actually was still working as I read it would stop after 5 or 6 times before it would no longer work. This has not happened, and it is still working. I checked my voltage while driving and it is showing the 14.0 - 14.7 as it did before I did the bypass. I replaced my main battery because it was bad. Anyone have any ideas as I did not want to buy a Tazer and I hope that the voltage is not killing my alternator now. Thanks in advance.

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[yoda13]

That’s what I did. If you leave the voltmeter up, I bet it doesn’t stay that high all the time. Mine doesn’t.

 

[mossyoak1967]

That’s what I did. If you leave the voltmeter up, I bet it doesn’t stay that high all the time. Mine doesn’t.

Did your start/stop quit working?

 

[Lunentucker]

The bypass will not disable Auto Start Stop.
You can practice pushing the button on the dash, get a Tazer, or get the plug in device.
I have made pushing the button part of my startup routine and now it's muscle memory.

https://www.smartstopstart.com/

https://www.autostopeliminator.com/collections/jeep

Mine routinely runs around 14.5 with the aux battery bypassed.

 

[yoda13]

Did your start/stop quit working?

No, had to keep pressing the button.

 

[Erievon]

As long as your main battery passes the voltage test, your stop/start will continue to function. The point of the way the aux battery bypass is done is so the truck has no idea it has been done.

 

[mossyoak1967]

As long as your main battery passes the voltage test, your stop/start will continue to function. The point of the way the aux battery bypass is done is so the truck has no idea it has been done.

So it looks like the only way to take care of the start/stop issue is get a Tazer and have it removed that way?

 

[mossyoak1967]

The bypass will not disable Auto Start Stop.
You can practice pushing the button on the dash, get a Tazer, or get the plug in device.
I have made pushing the button part of my startup routine and now it's muscle memory.

https://www.smartstopstart.com/

https://www.autostopeliminator.com/collections/jeep

Mine routinely runs around 14.5 with the aux battery bypassed.

Thanks for the input... I guess I will be buying the Tazer and remove the start/stop that way.

 

[Lunentucker]

Thanks for the input... I guess I will be buying the Tazer and remove the start/stop that way.

That's a lot to spend just to not have to push a button that's inches from the start button.
I marked mine with fluorescent paint just so it shows up a bit more overtly.

 

[DarthAWM]

Thanks for the input... I guess I will be buying the Tazer and remove the start/stop that way.

it doesn't remove it just remembers the last state it was set.

 

[40x40]

That's a lot to spend just to not have to push a button that's inches from the start button.
I marked mine with fluorescent paint just so it shows up a bit more overtly.

hello i follow a lot of your comments but have yet to see this topic. if i religiously push the button to disable the s/s, what purpose would the aux battery serve? if nothing, then i guess it would have a very long life. i live in GA, it's in a garage and i only drive twice a week about 25 miles per trip. my only electric add on is a winch, but i operate the engine at 2000 rpm when pulling. there are about a half a gazillion threads on this topic with about that many differing opinions. i'm too old to buy into the fear of "what if", as in, being stranded. can you provide me a definitive sense of direction?

 

[Lunentucker]

hello i follow a lot of your comments but have yet to see this topic. if i religiously push the button to disable the s/s, what purpose would the aux battery serve? if nothing, then i guess it would have a very long life. i live in GA, it's in a garage and i only drive twice a week about 25 miles per trip. my only electric add on is a winch, but i operate the engine at 2000 rpm when pulling. there are about a half a gazillion threads on this topic with about that many differing opinions. i'm too old to buy into the fear of "what if", as in, being stranded. can you provide me a definitive sense of direction?

I chose to bypass the aux battery and reduce my battery failure odds by 50%.
Anecdotally, the more common failure seems to be that the smaller auxiliary battery fails first, but the owner is unaware that's happening, because... IMPORTANT!!! - the batteries are essentially linked as one EXCEPT during Auto Start/Stop events.
That means that either battery failing to hold a charge can result in the cannibalization (the failing battery continually trying to recharge from the available power source of the remaining good battery).
So, with two batteries, regardless of which one begins to fail, it's going to take the other one with it.
It can do this while the Jeep is off and sitting parked, whether that is at home or wherever.

The purpose of the auxiliary battery is not provide reserve cranking power. The only purpose for it is to attempt to keep the delicate electronics in your legendary rugged off-road vehicle (sarcasm) somewhat isolated and protected when the engine is turned and restarted while you're sitting at a stoplight or other full stopped but still on situations. The Auto Start/Stop feature is there for emissions savings, and fuel savings will be negligible.

Frankly, it's poorly executed shit idea that offers more risk than reward, so I mitigated my risk exposure by bypassing the aux battery and I manually disable the function using the dash button every time I start the Jeep.
At least this way I'll know if a battery is failing, it's going to be the only one I'm employing.
The dead weight of the aux battery is there until my 3/36 is up next Fall. Then it gets the full removal. But for now, it's just riding around and doing nothing good or bad.

Summary: Risk management

 

[40x40]

I chose to bypass the aux battery and reduce my battery failure odds by 50%.
Anecdotally, the more common failure seems to be that the smaller auxiliary battery fails first, but the owner is unaware that's happening, because... IMPORTANT!!! - the batteries are essentially linked as one EXCEPT during Auto Start/Stop events.
That means that either battery failing to hold a charge can result in the cannibalization (the failing battery continually trying to recharge from the available power source of the remaining good battery).
So, with two batteries, regardless of which one begins to fail, it's going to take the other one with it.
It can do this while the Jeep is off and sitting parked, whether that is at home or wherever.

The purpose of the auxiliary battery is not provide reserve cranking power. The only purpose for it is to attempt to keep the delicate electronics in your legendary rugged off-road vehicle (sarcasm) somewhat isolated and protected when the engine is turned and restarted while you're sitting at a stoplight or other full stopped but still on situations. The Auto Start/Stop feature is there for emissions savings, and fuel savings will be negligible.

Frankly, it's poorly executed shit idea that offers more risk than reward, so I mitigated my risk exposure by bypassing the aux battery and I manually disable the function using the dash button every time I start the Jeep.
At least this way I'll know if a battery is failing, it's going to be the only one I'm employing.
The dead weight of the aux battery is there until my 3/36 is up next Fall. Then it gets the full removal. But for now, it's just riding around and doing nothing good or bad.

Summary: Risk management

thank you. i am a HUGE fan of snarkasm over sarcasm only because some people don't realize what i'm saying! i'm all for unnecessary weight reduction ( truth check: i still sport an appendix) so would the odds be in my favor to remove the aux now, home in the garage vs trail side? my warranty expires in may 2024. if so, please detail your sequence. hopefully this would be the last posting of this subject on jgf for ever.

 

[Lunentucker]

thank you. i am a HUGE fan of snarkasm over sarcasm only because some people don't realize what i'm saying! i'm all for unnecessary weight reduction ( truth check: i still sport an appendix) so would the odds be in my favor to remove the aux now, home in the garage vs trail side? my warranty expires in may 2024. if so, please detail your sequence. hopefully this would be the last posting of this subject on jgf for ever.

The bypass sequence is super easy.
The full removal is a bit more involved, and there are a number of methods and approaches for that.

BYPASS:
Disconnect the auxiliary ground cable from the other grounds at the main battery ground.
Wrap the cable end with electrical tape to prevent incidental grounding, and secure it out of the way using zip ties.
Remove fuse F42.

FULL REMOVAL: I haven't done it yet, but you can either gain access by removing the entire fusebox and going in from the top, or you can go in from the bottom by way of the fender liner.

Here's a cable deletion guide from @Hootbro , but I would recommend watching some videos and choosing a method that you're comfortable with.

 

[Kevin_D]

The Auto Start/Stop feature is there for emissions savings, and fuel savings will be negligible.

Research has shown fuel savings in the range of 7-10%.
And with fuel at ~$4.00/gal. around here, I wouldn't call that, "Negligible."

Kevin

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