I swapped the battery in my '02 this weekend and found a spring loaded disk at the center of the battery tray that appears to be connected to the wiring harness. Any idea what it might be for?

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Early '02 Limited, Steel Blue, White Guts

IT'S A BOOBIE TRAP!!! You know like Indiana Jones!


Seriously though, I have no idea. I just couldn't resist!

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-Gavin
2006 4x4 Sport ~ Dark Khaki
2.5" Rockfather II
Tow Hooks ~ HH Rear Hitch
Hella 500's

gwip Design

I found mine when installing a lift.

I believe it is a temp device just in case the battery gets hot.

KJKev

On the Xj that is part of the cold weather package, I belive it to be a battery temp sensor.
(ninja edit)

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http://www.Colorado4Wheel.com
"Its not about what you can DO with your Jeep, its about where you can GO with your Jeep."
Knowledgeable - But Caustic

^^^^^^ He is right,it's the battery temp sensor,it's part of the charging system to prevent overcharging.

That's cool to know, I've never seen that on any other vehicles. I don't often pull out batteries for the heck of it though...

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-Gavin
2006 4x4 Sport ~ Dark Khaki
2.5" Rockfather II
Tow Hooks ~ HH Rear Hitch
Hella 500's

gwip Design

cherokee xj has had them since 97. when battery is hot it signals the pcm to knock down the volts. when battery is cold it turns the volts up. mike

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06 kj 3.7 nsg 370 np 241 dark khaki

Thanks, I looked into the temp sensor some more. It appears to also signal the computer to switch some of the emissions sensors on and off in cold conditions (20F I believe). Not sure why. Ya learn something every day

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Early '02 Limited, Steel Blue, White Guts