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Thread: battery woes

  1. 2nd April 2010, 10:03 AM #1
    lewy
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    battery woes

    trying to find out why the starting battery goes flat after about two weeks of being idle.with the negative connected does this reading on the multi meter tell me something is wrong with the battery,positive probe on the + and negative probe on earth,I am multi meter illiterate.




    Last edited by lewy; 2nd April 2010 at 10:42 AM. Reason: added pic
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  2. 2nd April 2010, 10:25 AM #2
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    drivesafe
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    Hi Lewy, first off can you take a closer picture of your multi meter, specifically the dial settings.

    Next, not sure what your trying to do, I think you are after a current reading, if so just make sure nothing is on in the vehicle because any load over 10 amps will blow the fuse in the multi meter.

    For Land Rover Specific Dual Battery Systems and Headlight Wiring Upgrade Kits,
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  3. 2nd April 2010, 10:44 AM #3
    lewy
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    pic added,should there be no resistance between pos and earth
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  4. 2nd April 2010, 11:17 AM #4
    PhilipA
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    pic added,should there be no resistance between pos and earth
    Lewy, what you are trying to find out is how much CURRENT is flowing while the car is turned off.
    To do this you disconnect either the + or - terminal then place one multimeter wire on the battery terminal and one onto the wire you have removed. You then set your multimeter on "AMPS".

    The amp drain should be under 1 so should be alright to leave the black multimeter terminal on COM.

    If you want to find the circuit which is draining you should remove fuses one by one , noting the change in amps used.

    My bet it is the clock, alarm and radio, coupled to a tired battery.
    Regards Philip A
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  5. 2nd April 2010, 12:11 PM #5
    lewy
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    yep.1.9 drain,unhooked the clock then 1.3,unhooked the radio almost zero.wonder why the radio draws despite the key is off,
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  6. 3rd April 2010, 09:08 AM #6
    PhilipA
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    Memory.
    AND have you added an amp to it? You have to have a switching wire from the radio to an amp to turn it off and on. Maybe someone has just had it on all the time if there is one.
    Regards Philip A
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