ess battery

  1. ESS Issue (Stopped Working) and Repaired

    I have a 2019 JLU Sport S 3.6 Manual - ESS stopped working a few weeks ago, which was fine with me...first thing I do is turn ESS off. But then I read (on here maybe?) that it could indicate a problem with one or both batteries and/or my alternator. So I took it in while it was still under...
  2. Battery isolator for factory dual battery configuration?

    Has anyone thought about adding a battery isolator to the existing factory dual battery configuration? Is it possible? Problem - the factory system does not protect each battery from the other. So, if one battery fails the other follows not far behind. This happens on a regular basis from the...
  3. 3.6L ESS Battery Basic Load Testing

    Checking the voltage of the batteries is a good start, but a battery with good voltage can still fail when under a load. To really test the batteries, you need a load tester. Some auto parts stores will load test your battery for you, but having dual batteries complicates the testing. To do my...
  4. 3.6L ESS Battery Basics

    I have observed that there may be a need for some basic ESS based electrical theory. For those that struggle to understand how electricity works, some basic electrical concepts can be better understood by using basic plumbing concepts. Substituting water for electricity, pipes for wire and water...
  5. 3.6L ESS Aux Battery Bypass

    I've seen quite a few posts related to failed Aux batteries causing flaky or dead electronics, stalling and failing to start/auto restart. I've come up with a simple way to temporarily bypass a bad Aux battery (also blown PCR fuse or bad PCR) and get back on the road. Warning - this post...
  6. 3.6L ESS Battery Diagram

    Here's my attempt at a diagram that illustrates the battery connections for the 3.6L ESS dual batteries. Hopefully this will help make sense of why things work the way they do. I tried to show that when you pull the battery terminals off of the battery, there is still an electrical connection...



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