Question about 2004 Chrysler Pacifica

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'04 Chrysler Pacifica battery won't hold a charge for long. Sometimes it will be fine for months and then not start. Other times it won't last more than a day. I was thinking it must be a parasitic drain from somewhere. Does anyone have any idea? I was about to purchase a new battery but don't want to get one if that's not the problem.

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  • moodubs Apr 03, 2009

    I have the same problem...I cannot leave my liftgate open for very long or my battery dies.

    We have to leave the car started anytime were in and out of the back, b/c of this.

  • ntruji11 May 11, 2010

    Is it during the colder months that it is fine?

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  • Chrysler Master
  • 19,396 Answers

First try to understand if there is a parasitic drain.

Once you exclude the drain, replace the battery, a battery with shorted cells can cause the drain.


The firmware has nothing to do with drainage, unless the unit is factory defective.

To measure drainage remove ignition key, connect the amp meter between the battery positive wire connector and positive terminal.A couple of milliamps drainage is normal, and is caused by instruments, car stereo memory, ECU etc.
Start removing more fuses , and open the wiring at different points , trying to locate the problem.
Remove the fuses and see if you have drain by connecting a meter to read amps on battery, if you have drain with no fuse, then the problem is insulated to wiring harness before the fuse, with something shorted between the battery and the fuseblock.
Also check car stereo and car amp HU, the HU can keep a unit on when the ignition key is off, causing drain.


Posted on May 17, 2009

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Had the same problem for 3 years and 3 batteries. Have fixed it now - all good, no electrical problems, no battery corrosion. All I did when I bought my last battery was buy a generic replacement terminal clamp for the negative post and got rid of the funky copper one. Do it!

Posted on Sep 27, 2010

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