Stop start system failure light. A!…

[Vicki Cox]

Stop start system failure light. A!…shows on dash after battery went dead. We read that it’s not a problem just that it won’t shut off when stopped in traffic. Can someone confirm please?

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[TheNewGuy]

Stop start system failure light. A!…shows on dash after battery went dead. We read that it’s not a problem just that it won’t shut off when stopped in traffic. Can someone confirm please?

Which battery did you replace? Best to replace both at the same time.

 

[Vicki Cox]

Which battery did you replace? Best to replace both at the same time.

We didn’t replace battery. Our brake buddy drained it while towing Jeep and we jumped it. All is good except the dash warning light.

 

[mwilk012]

Probably Ko’d your battery.

It is a problem and anyone who says otherwise is asking for trouble.

 

[Vicki Cox]

Probably Ko’d your battery.

It is a problem and anyone who says otherwise is asking for trouble.

Thanks. That’s why I’m asking.

 

[Old Dogger]

https://www.jlwranglerforums.com/forum/threads/jumperless-aux-battery-bypass.95945/
^^^ If you want to eliminate the aux battery, then here is the mod.

 

[AlphaWrangler]

Probably Ko’d your battery.

It is a problem and anyone who says otherwise is asking for trouble.

What kind of trouble are we talking. I've had that light on consistently for 20k. Roughly a year.

 

[Vicki Cox]

Which battery did you replace? Best to replace both at the same time.

Thank you. We didn’t know it had 2 batteries.!!! This is the first Jeep we’ve owned.

 

[Dan M.]

Yes, there is a 2nd smaller motorcycle style battery that restarts the Jeep for the auto stop/start system. However, as it is connected to the electrical system it can cause numerous weird gremlins or in the worse case scenario you might get a message telling you your Jeep will stop running and to pull over immediatly. I see you haven't had any problems aside from auto stop start for a while, but you should consider changing that smaller battery out before problems start coming up. I haven't had to do it yet, but I've heard it is pretty simple if you go thru the fender vs thru the hood as it is under the main battery. Plenty of threads on here about how to do it.

 

[OldBlue]

You don't have the year of your Willys listed, but expect troubles to start creeping up when you get to about 3 years old.

 

[Vicki Cox]

Yes, there is a 2nd smaller motorcycle style battery that restarts the Jeep for the auto stop/start system. However, as it is connected to the electrical system it can cause numerous weird gremlins or in the worse case scenario you might get a message telling you your Jeep will stop running and to pull over immediatly. I see you haven't had any problems aside from auto stop start for a while, but you should consider changing that smaller battery out before problems start coming up. I haven't had to do it yet, but I've heard it is pretty simple if you go thru the fender vs thru the hood as it is under the main battery. Plenty of threads on here about how to do it.

Thank you for the help and advice.

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