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Parasitic Battery Drain

Discussion in '4th Gen 4Runners (2003-2009)' started by greerszy, Sep 30, 2022.

  1. Sep 30, 2022 at 6:37 PM
    #1
    greerszy

    greerszy [OP] New Member

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    I have a 2006 Limited V8 and have a serious battery drain and I can’t find the cause. Alternator and battery are both good and check out. I have put a multimeter in series with the battery and am seeing a 12 amp draw I have pulled all fuses in engine compartment and cab with no luck in the drain dropping. Disconnected remote start, starter, plug connections to all doors. Running out of ideas. Any suggestions would be appreciated. Thanks
     
  2. Oct 1, 2022 at 9:58 AM
    #2
    trlhiker

    trlhiker New Member

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    Do you have an aftermarket alarm? If so, pull the brains and that should stop it.
     
  3. Oct 1, 2022 at 10:51 AM
    #3
    2Toys

    2Toys Imperial Star Cruiser

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    Gordon
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    a few goodies
    I have seen this issue - but on a 2006 - 07 Landcruiser. The vehicle had a number of mods, and I don't think they ever figured it out. One thing it did have was a way to Bluetooth cell phone audio to the factory stereo. Does yours have this?
    Another mod was Hella driving lights.
    And, as stated above, an aftermarket alarm system.
     
  4. Oct 1, 2022 at 1:23 PM
    #4
    greerszy

    greerszy [OP] New Member

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    Yes after market remote start/alarm pulled all the brains and everything in-line fuses still didn’t make a difference. No aftermarket stereo or Bluetooth components. Thanks I will keep digging.
     
  5. Oct 1, 2022 at 1:30 PM
    #5
    2Toys

    2Toys Imperial Star Cruiser

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    I wonder if there is either a short in a wire harness somewhere - such as the firewall pass through, or possibly a ground with high resistance (corrosion). There are systems in your truck, such as computers, that require power full time. Another item to look at is the dashboard clock. I had an older Toyota HiLux with a digital clock that used to run down my battery.
     
  6. Oct 1, 2022 at 2:05 PM
    #6
    Daddykool

    Daddykool Photography enthusiast

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    When you say you disconnected the remote start, what exactly did you disconnect? I had a problem one time on a Corolla and pulled both 30-amp fuses to fix that problem.
     

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