Killing All Power

[jludave]

I was asking about a NON jl or JT, and wanting to understand the reasoning.

It's a matter of preference. There is no advantage.

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[Rhinebeck01]

Sorry for the side track. i am curious about the reasoning on removing the positive first on other vehicles. I was always taught (and that doesn’t necessarily make it right) negative cable, first off, last on. On a non Jl or JT what is advantage of removing the positive?

@Terrymo

When talking the proper way to disconnect or reconnect any vehicles battery you were taught correctly.

For those that have never disconnected a JL's / JT's. Main battery and then reconnected the Main battery..

...Do know that you will see a sizeable spark when you reconnect the negative. That is normal to see. Just be prepared for the spark so it does not catch you off guard.

Also...With the JL/JT. if/when you do take the Main bundle positive bundle off.. As soon as you disconnect that bundle, immediately wrap that bundle in a shop rag. Again, wrap it immediately after disconnecting that bundle.

 

[Terrymo]

[.


@Terrymo

When talking the proper way to disconnect or reconnect any vehicles battery you were taught correctly.

For those that have never disconnected the JL's Main battery and then reconnected the Main battery..

...Do know that you will see a sizeable spark when you reconnect the negative. That is normal to see. Just be prepared for the spark so it does not catch you off guard.

Thank you

 

[Old Jeeper]

@OldJeeper

Not wanting to argue .... but, no way with a JL or JT would I do it that way. I encourage other's not to do it your way!

What you have done for 20 yrs. is something similar, I myself have done for even longer.... as I too am also an old fruck...

... but with a JL or JT, I do not do as I did with other past model year Jeeps. I know it is prudent to do the deed differently when you deal with a JL/JT.

Easiest and more prudent way to do a total 12v power kill on a JL ir JT, is as explained/pictured, in the image I posted earlier. (Yes, there are other ways)
--->You leave the positive Main bundle alone and disconnect only the Main's negative bundle. Then you separate / disconnect each cable on the negative bundle you disconnected. Do that and you have a full 12v power disconnect on your JL/JT... and you did not chanceing blow a fuse in the high amp fuse array, etc..

.

Well lets talk here.

First of all what makes the JL/JT unique (I have owned 2 of each)?

As for taking off the + first, I learned that from my dad back in the 60s and if anyone knew it was him...Dad took the test FCC Electrical Engineering. They called him in after the test and told him he needed to take it again because he scored 100+ % on the test. There were 2 questions that Dad told them were wrong in that none of the multiple choices were correct. They also told him they thought he cheated! So Dad heads down there they make him empty his pocket, they look at his hands and arms and they set him in the middle of the room with two guys watching the entire time. LOL Dad once again got 100+ finding 3 more questions that did not have the correct multiple choice answer. Dad knew about electricity like no one I have ever known.

So conventionally current flows from positive to Negative albeit it flows in both directions if it is AC. I will assume that even in the JL/JT it's a DC and it flows from + > - and I leave on the negative cable due to possible latency in the electrical change at the unit that is electrified.

One of the things I did when I had my Jeep shop was build battery cables. Auto-grade cables are not worth having as they create a lot of problems. I used 100% zinc-plated Copper connections and no connections were crimped. All of my cable was welding grade (fine wire). Auto grade is NOT fine wire and a lot of guys came into my shop and were having electrical issues. The culprit in most cases was internally corroded negative cabling.I would build them a set of "SavageSun Jeep" battery cables, problem was solved.

Sorry for the stories but takes me to the question: Is the JL/JT a different breed of electrical and explain why you remove the + cable first? My thinking is if you want a system kill then the only way is to ground it and this ensures the latency is accounted for (if there is and there may or may not be).

No argument with you just enlighten me...

 

[jludave]

Is the JL/JT a different breed of electrical and explain why you remove the + cable first?

It is not a matter of disconnecting the negative cable/s first. It is a matter of properly disconnecting the batteries when dealing with a main and auxiliary battery. This guy does a descent job detailing it.

 

[FireAnt21]

I have the etorque so no aux battery. What procedure to I use to do a full kill?

 

[Old Jeeper]

It is not a matter of disconnecting the negative cable/s first. It is a matter of properly disconnecting the batteries when dealing with a main and auxiliary battery. This guy does a descent job detailing it.

My fault, I assumed that both batteries would be disconnected when I said to disconnect the + cable.

I am still not sure as to why Jeep did 2 batteries. Jeep could have easily just upped the battery size for the extra depth of power.

Then the location of the 2nd battery...surely they could have found additional space that you could get to. Maybe if Jeep replaces the 3.6 V with a Straight 6 it will open up more room in the engine bay...

 

[jludave]

I am still not sure as to why Jeep did 2 batteries.

To make life difficult . Most with aux batteries, including myself, simply bypass it.

https://www.jlwranglerforums.com/forum/threads/jumperless-aux-battery-bypass.95945/

 

[Rhinebeck01]

Today/now.... I'm in the midst of doing brake service, plugs and PVC change out on my JL or I would have gotten back here sooner.

@OldJeeper .... I see though, @jludave has chimed in with info...

To be honest with you... now a days, I hesitate getting in a back and forth / or do any re-explaining in regard to any topic that encompasses the JL's dual battery system.

Thanks to 2 specific forum member's, (I will not name them) the most recent dual battery related conversations on this forum are more often then not, riddled with misinformation and are absolutely laughable at best.

Recent newer dual battery related posts are mostly by 2 guys that have cut and pasted past posts and adding pure crapola to that info and well, carrying on like 2 girl teens in a HS bathroom.

With that said I encourage all, if you want to learn about the JL's dual battery system, for you to forum research any and all dual battery related posts/threads by @Jebiruph.

As for posts by others, ... even my posts... do brisk through them, but do only take to the bank/trust, posts by @Jebiruph.

For sure laugh and run away from the two utter asshats, I mentioned, that have littered the forum with their little girl bullchitt talking dual battery system.

.

 

[THAW]

For sure laugh and run away from the two utter asshats, I mentioned, that have littered the forum with their little girl bullchitt talking dual battery system.

I accept my nomination for the 2024 Rhinebeck01 Asshat award ?

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