What is this wire?

[@minutemen]

I disconnected this wire for a second while installing a light bar. Now my check engine light is on. Did I do something wrong?

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[Goosed]

I think that may be the ground wire for the 2nd battery. I would disconnect both batteries again and let it reset, hook them up and make sure it’s tight.
did you wrap that wire with anything while is was disco’ed?

 

[@minutemen]

@Goosed I did not. I disconnected it only to loop the light bar ground between that wire and the frame so there was no need to cover it. Is there a special way to disconnect the battery since there is two of them?

 

[@minutemen]

Found this. It doesn't mention the little wire that I messed around with. Credit to @FatBoy01.

https://www.jlwranglerforums.com/forum/threads/to-kill-12v-power-to-the-jl-jlu.6244/

 

[Sting_NC_USA]

Those are Ground points for the dash components. You may just need to reset the codes. Check with any local auto parts chain, as they usually do that for free.

 

[@minutemen]

Quick update. The check engine light went away on its own before I got around to disconnecting the battery. Thanks for the help. Peace

 

[TJJL19]

I found this on the internet, when I was looking at the alpine pss-23wra on my JL.
In the video by Quadratec,they just take off, the ground, from the main battery!
They run the power wire without any seen problems.

Guy's I am sorry to have posted you the wrong information with the Quadratec video. The video let me believe, that pulling the negitive off the battery, would cut power, it doesn't. I pulled the negitive off and noticed my powered sub lite on, I was so suprized I checked to see if the cable was off and it was,ESS JUNK!

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