Diagnostic tools for start stop system not working

[Rickster73]

Minutes.
1. Disconnect the aux ground at the main battery ground group.
2. Tape the end to prevent incidental grounding and secure with zip ties.
3. Remove fuse F42

If you have no power at all, you removed the wrong cable. Swap them.
If you lose all power, your subscriptions and icons on the screen may be temporarily lost. They'll come back after a few hours. Overnight at worst.

The only sure way to test both batteries is to separate them and charge/test each one independently. Except during ESS, they are linked as one, and if one is failing it can purge the other one by constantly trying to recharge from it.
It's a stupid system, and isolating the main cranking battery from the aux cuts your failure chances in half, AND it allows you to independently gauge the veracity of the main battery - the one that gets you home.

Ignore the part in the video about this disabling ESS. that was wrong. ESS will still function, but just use the main battery.
You can disable it by other methods and devices.

***HELP***

I followed these same steps shortly after I purchased my new to me 2023 Jeep Gladiator Overland. It worked at least until yesterday when suddenly it started working again. How can this be when the cable is still taped and zip tied & fuse 42 pulled???

Any ideas???

Sponsored

 

[ShadowsPapa]

***HELP***

I followed these same steps shortly after I purchased my new to me 2023 Jeep Gladiator Overland. It worked at least until yesterday when suddenly it started working again. How can this be when the cable is still taped and zip tied & fuse 42 pulled???

Any ideas???

Doing all of that does NOT prevent ESS from working.
It fixes nothing, changes nothing as far as how the vehicle works, ESS will still work if the main battery state of charge is good.

ESS likely started working because the battery state of charge was high enough, or certain conditions out of a list of over 30 conditions were finally met - and it started working again.
It likely didn't work when you did all of that because there was something going on, like low battery voltage, or a host of other things - disconnecting a cable and pulling the fuse won't make ESS work or not work.

I keep my batteries charged, and monitor systems, and have had no issue.
ESS has worked perfectly for over 2 years.

 

[Lunentucker]

***HELP***

I followed these same steps shortly after I purchased my new to me 2023 Jeep Gladiator Overland. It worked at least until yesterday when suddenly it started working again. How can this be when the cable is still taped and zip tied & fuse 42 pulled???

Any ideas???

Sponsored