BIM & Step/Cord Reel Issues

[GibbysWorld]

We have been having issues for a while now with the BIM & step/cord reel. The multiplex at times will show the chassis battery only reading between 2-4 volts and when it’s like that the step and cord reel won’t work (I can still start the engine so I know it’s not actually that low). This would usually only last for a few minutes and the BIM would click and everything would work again. However, today it has lasted all day and the only way to get the step/reel to work is pressing the boost button under the dash and then it only works for a few seconds. I have looked at all the circuit breakers in the basement behind the hidden panel and nothing is tripped. Based on the wiring diagram, the breaker that connects the cord reel and step wiring is not a resettable type breaker (?). Not sure what the problem is or how to rectify it. I have taken it to the dealer but of course they couldn’t duplicate the problem.

Any help would be greatly appreciated.

[Grumpy]

Could be a "ground gremlin", check all the grounding connections.

[SanTanSeneca]

I had similar issues with my 2018 HJ and through this blog discovered that there is a circuit breaker on top of the chassis battery; not a traditional looking circuit breaker. Search the threads earlt 2021.


Mark & Melanie (& Bonnie)
2018 Seneca 37HJ
2017 Jeep Wrangler

[Rustynuts]

Originally Posted by SanTanSeneca

I had similar issues with my 2018 HJ and through this blog discovered that there is a circuit breaker on top of the chassis battery; not a traditional looking circuit breaker. Search the threads earlt 2021.


Mark & Melanie (& Bonnie)
2018 Seneca 37HJ
2017 Jeep Wrangler

The breaker on top of the chassis batteries only pertains to 2018 and older units. 2018.5 it’s on the S2 chassis the breaker was mounted on a side wall in the main battery compartment. Then somewhere in 2020, they moved all the electrical components into the compartment just aft of the battery compartment, covered with a carpeted box with a removable panel. People have found loose connections in this carpeted compartment, I would start by checking in there.