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  • #1

    Main battery draining

    Hi all
    I recently returned from a two week holiday to find my main battery was completely flat while the auxiliary was fine. I chalked it up to my reverse camera being manually left on. Crossed started and off I went.

    A day ago I received my new fridge which I placed in the car and started running to see how long it would last
    About 30 hours later I did a check
    Aux battery is at 12.23 v
    Main battery is at 11.57

    WTF

    Now I have confirmed the fridge is definately running off the auxiliary and the batt isolator has done its job.
    But something is draining my main batt.
    I hooked up a multimeter and can confirm that my main is draining at around .5 amps.
    I systematically pulled the fuses under the hood but no change and I can confirm no light/chime or anything obviousness is powered.

    Any thought ??????

    Cheers
    Tags: None
  • #2
    Glove box light ??.....Cheers Steve
    Face lift 150 Prado V6 auto. No mods yet

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    • #3
      Did you pull the alternator fuse?
      HKB Electronics, manufacturer of the Alternator Voltage Booster, Silver 2008 D4D,Lifted,Underbody protection, Alternator Voltage Booster, Tiger Z winch, Lightforce DL, Air Horns, Tanami Drawers, Drop down fridge slide, Outback cargo barriers, Rotronics dual Battery system, Polaris GPS, HF/UHF/VHF, Radio speaker combiner, Long ranger water tank, Diff breathers, Inverter, Snorkel and others

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      • #4
        How old is the main battery? Perhaps its had its time?
        Greg - 08 D4D Prado,
        Some trips done - Cape York, Fraser Island, Simpson Desert / Central Aust, Vic High Country.

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        • #5
          My original battery ceased and desisted at about 30 months, symptons were the same.

          See ya on the tracks, Richo.
          [B]Former [/B]Party Leader, [B]Now[/B] SDO SEQLD GTG 2015 PFA (Pradopoint Fairy Advisor)
          [B]Bitumen - A Blatant Waste of Taxpayers Money[/B]

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          • #6
            Yeah I'm thinking the batt may be U/S but the current draw threw me a bit. Ill try the alt connector and suss the battery tomorrow. After I fit my 2 inch lift that is.

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            • #7
              What Steve said has merit mate...been there done that.. also another area to look at (personel experience) is dirt on the trailer plug connection..Some electrical brake plug connections have a small amount of power there all the time.When camping I've learnt to always disconnect the trailer plug when i pull up for the night.

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