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  • Dual Battery System from Major 4x4 company

    This is my latest story. 2011 is not shaping up to be one of the better years for me and the truck but I hope it improves. You might have read my story about the broken tip of a glow plug costing me thousands and 9 weeks in with Toyota while parts came from Japan. Well, I now have another story.
    I have been laid up after a leg operation for a couple of weeks and the truck has not been driven nor started for that time. On Sunday we had to make the trip to Caloundra about 90km north and as I am not allowed to drive (doctor's orders) SWMBO was sitting in the ejector seat while I was lying in the back with my leg up. She turned the key and all we heard was a were, were, were; no go. Now that has never happened before and even with my limited knowledge of auto electronics, a battery should last, hold a charge for longer than 2 weeks if not started.
    What is going on here; the battery is barely 2 years old and has shown no sign of going down.
    AAAHAA but I have a dual battery system that I had installed by a large 4X4 company only in March that cost quite some dollars just for this occasion.
    The bonnet was lifted and the red button was pushed on the DBS; this is the isolator so I've been told.
    Back into the car, strapped in again and the key turned. Were, were, were.
    What the hell is going on here??? Do I have 2 flat batteries??
    A phone call to the RACQ and 30 minutes later the batteries are tested and both are exactly the same voltage of, I think if I can remember: 11.73 volts. Hhhhmmmm.
    The RACQ bloke used his jumper leads and gets the car started which it did easily. He uses his gauges and the voltages in the batteries start to come up over 12 and nearly to 13.
    "I think there must be a problem with the DBS isolator or with the cabling somewhere but suggest you get back to the people who put the dual battery system in and get them to check it." Glad we were not out the back of Bourke somewhere where we thought this problem should never happen.
    "You should have enough charge in the batteries by the time you get to Caloundra to get you home again" which we did.
    So I phoned the company yesterday, Monday and took it to their workshop at about 2:00pm for them to check. We waited a few minutes for a quick diagnosis before going home as it was going to take more than just a couple of minutes. I was told it was a problem with the battery.
    At 5:00pm we went back to collect the car and was greeted with the keys being held over the counter with the words, "It's right to go now.
    Now that wasn't enough for me as I wanted to know what the problem was. "What was wrong and what did you do?".
    Oohhoo!! "We had to put a new battery in it and adjust the wiring."
    "But I thought that the 2nd battery should be isolated and that both batteries should never go down together."
    "Sometimes this happens with batteries but it is all fixed now."
    Now as it was already dark, we left the shop and SWMBO drove us back home with me lying on the back seat. I didn't have time to even look at what I could see under the bonnet.
    Anyway, I have just looked this morning. I do have a new battery as the old one I had put the date on it with whiteout. I don't notice any difference with the cables as there are so many of them with another isolator on the other side of the engine bay that runs the cable to the Anderson plug that charges the battery in the camper trailer when on the road.
    But I do have another box. I don't only have a DBS but behind it I now have an IBS also that is wired into the system.
    Does anyone know what all this is??
    Yesterday didn't cost anything; sorry about being long winded...
    [color=#fa0c23][b]
    Brian
    [/b][/color]

    [color=#004080][b]2011 Silver GXL Diesel Auto with dual batteries & pirellis etc often pulling a Jayco Discovery Outback
    [/b][/color]

  • #2
    Good morning sunshine (sorry had to do that)
    Was the car locked while sitting.
    My room mate has a 2010 subaru imprezza (2 months old at the time) and she she left it in my shed with the keys on the dash and i went to drive it after 2 or 3 weeks and nothing, wouldn't even turn the radio on. I rang subaru and the girl strait away asked if the car was locked or unlocked, apparently the cars computer only turns off when the car is locked, found out that day that the same applied to my other room mates Navara.

    this might be it
    if the car was locked then i wouldn't have a clue
    Case
    Former Grande Owner
    2003 V6 Grande, Pearl white, TJM bulbar, ARB under bonnet air compressor, HID Lightforce genesis spotlights, 50MM Suspension lift (yes a proper airbag lift)

    Comment


    • #3
      Similar "case" (sorry could'nt help myself either...) with my work car which is a RAV4. However even if the car is locked, the battery is still being drained... I went interstate for 8 days, locking my car up at the airport. Returned home with 1 hour to go before state of origin kick off, get to the car park and the battery is dead flat. not even enough to unlock the doors... taking quick action I rented a car for the night (cheaper than a cab anyway) and walked in the door with 2min before kick off. The battery was replaced the next day and the Marshall Batteries man said that he sees this all the time, especially with Toyotas. the car was only 6 months old!!

      Back on topic, Sorry Brian I am still unfamiliar with Dual batt systems so will leave that one to the more knowledgable. Although you were inconvenianced by this fault, and it should never of happened, at least company has honored their workmanship (or lack thereof) and the problem was rectified at no cost to you and you have scored a new battery which was probably near end of life anyway (the average battery these days are only good for 2-3 years, depanding on the type of life it's had).
      2004 V6 Grande. BLACK -

      Comment


      • #4
        I have a 120, it sits in the shed for 5 weeks at a time(i do 5on 5off) with a self installed dual battery system. Lock the car every time n starts every time no probs. Main battery 28/02/07 original from new. I charge both with Ctek chargers B4 leaving. You have problems "Sunshine"(sorry couldn't help myself as well)
        Yep.....I have a Prado just like you
        Bugger Bali, get out and see Australia before we sell it all to China
        My Rig Build Towing Camprite TL8s (if ya wanna look PM me)

        Comment


        • #5
          Even if the main battery dropped charge for whatever reason, the aux should not have. At least not unless it was somehow leaking charge into the main, which the isolator is supposed to prevent. Something sounds fishy.....
          Diesel Prado with various things...

          Comment


          • #6
            Hi Brian, The IBS unit that they installed, is that the unit showing the voltages on the front with the manual/auto buttons on the front? If so i believe that is an undated version of the previous IBS. I personally have had nothing but trouble with mine and im a hv leccy, I wish i had of installed a simple system. The best advise i can give is get rid of the rubbish white twist together fuse holders if that is what they have installed..they will corrode and cause u problems. Your going to have to get a tong meter and just go through it and see if the system is drawing anything from the batteries while the vehicle is sitting stationary.
            08 GXL Diesel Auto,ARB bar/roofrack, ATS liftkit

            Comment


            • #7
              To answer some of the questions.
              Yes, the car was locked all the time.
              Also the DBS has a red and a black button on the front and you press the red button, which I did yesterday to test the system; to link the batteries if the starting battery goes down. It did link when I pressed it as I heard it click quite loudly. I then pressed the black button to separate the batteries again. Click.
              The IBS which I looked up yesterday with Google is made by the same company (Swiss) and also has some functions with the linking but is totally sealed with no buttons or anything to adjust. Many installations of the IBS include a gauge that you can have on the dash inside the car with green, yellow and red lights where you can monitor the operation of both batteries. You can see how healthy each battery is, what amount of charge is going into each battery etc while driving. They didn't install that part for me and I don't know if I need one either. I found out all this by googling IBS on the net yesterday.
              Sunshine
              Member
              Last edited by Sunshine; 09-06-2011, 09:16 AM.
              [color=#fa0c23][b]
              Brian
              [/b][/color]

              [color=#004080][b]2011 Silver GXL Diesel Auto with dual batteries & pirellis etc often pulling a Jayco Discovery Outback
              [/b][/color]

              Comment


              • #8
                Hi Sunshine,

                Modern vehicles will flaten the battery in around 6 weeks, I think if you check with the dealer
                they'll say to disconnect the battery if your not going to run the vehicle for that period of time.

                An old battery will obviously last less.

                The same could apply to your aux depending on what accessories you have connected and their standby current consumed.

                I would suggest that you lock the vehicle with the boonet open and then use a good quality milli amp meter
                to measure the standby current being drawn from each battery. To do this you will need to disconnect the positive
                or negative terminal of each battery and insert the amp meter in series with it and the battery terminal and measure
                the current, (you'll loose radio and power window settings) you would expect it to be quite small under normal conditions.
                Using this info you will be able to work out how long the batteries will take to flatten and if you have an electrical fault/drain in the car.

                Cheers
                LeighW
                LeighW
                Avid PP Poster!
                Last edited by LeighW; 09-06-2011, 09:00 PM.
                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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