To Kill 12v Power to the JL/JLU

Htfan

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Additional info that you might be interested in..

You can have a fully charged Main battery and if the ESS battery is either dead or disconnected, the JL will not start, even though the main battery is fully charged. On the other hand, if the main battery is missing or dead the ESS battery can start the JL/JLU.
.

If you wanted to isolate the positive side, disconnect N1 & N2 in the power distribution box.
N1-Main battery, N-2 ESS battery.
disbox2.jpg

This is good info, but other sources have said "N2-Main battery, N-1 ESS battery"





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Arctric

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JLUR here, some info that might be useful to someone - Decided to do some welding around the bumper area today. Disconnected the 3 grounds from the inner fender as in diagram from first page. Still had power to dash. Then disconnected both negative cables to battery, checked and no power. After welding, reconnected everything and the u-connect system is not operating correctly. Previously, for 6 months, the stop start function was not working and showing a dash fault light. Now, stop start is working but temp controls only go to Hi or Low, nothing in between. Sirius is gone from the menu, and no backup camera in reverse. Came in to look for some answers, found none. Went back out and started it up and now everything is back to normal. Fixed itself. Unfortunately, the stop start function is working again.
 

D60

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I forgot to reconnect one of the wires at the fender once (don't remember which) and it made the alarm go berserk....
 

LHuffman47

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Is this still the universally accepted way of removing the power?
 

Arctric

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Is this still the universally accepted way of removing the power?
Have had no problems since my post above in April. After reconnecting everything we had to cycle though a couple startups before everything worked again.
 

Tinag

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You DO want to kill 12v power before working on any electrical connections on your JL/JLU!

To kill 12v power coming from the JL/JLU's Main and ESS batteries you need to disconnect as per the picture below. One nut is a 10mm nut and the other two, are 13mm nuts.

JLpower.jpg



grounds3.JPG
Thank You, that fixed my issue
 

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