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switch under the batery?

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Old 24 Jul 2011, 08:17 am
Cool Cruiser
Join Date: Jul 2011
Location: somerset,ky
Posts: 223
Default switch under the batery?

whats that little white round switch under the battery? mine is messed up would it effect the car starting? or anything if it s not right or shorted?
04 PT gas
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Old 24 Jul 2011, 08:44 am
Dedicated Cruiser
Join Date: Mar 2011
Posts: 2,943
Default Re: switch under the batery?

It's a battery temperature sensor.
From :
"The battery temperature sensor reacts to different temperatures by producing a voltage between .04 volts and 4.96 volts DC, based on an input voltage of 5 volts DC. Because the logic module is so close to the battery, these readings can be used to estimate the temperature of the battery itself. Knowing the temperature of the battery is important because batteries are sensitive to heat, and the logic module will reduce the power sent to the battery by the alternator to prevent “cooking the battery.”

You should go get another one
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Old 24 Jul 2011, 10:12 am
Cool Cruiser
Join Date: Jul 2011
Location: somerset,ky
Posts: 223
Default Re: switch under the batery?

any way this could be causing my short in my electrical system? blowing my ASD fuse? see my other post been tryin to fix my car for 3 weeks,,no luck..found that and thought I "d rule it out...
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Old 24 Jul 2011, 06:24 pm
mdfrodolives's Avatar
Senior Cruiser
Join Date: May 2010
Posts: 1,313
Default Re: switch under the batery?

I'd at least try replacing the shot battery-temp sensor--and see what happens. Chrysler wouldn't have wasted the money unless they thought it necessary. Also, if you have no battery blanket that came with the car, you might buy a new one at the dealer (they're very cheap). Your battery won't get as hot and you won't lose as much water.

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