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Battery Drain

Discussion in 'A4/S4 forum(B5 Chassis)' started by Nitro, May 10, 2014.

  1. Nitro
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    Nitro Member

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    [May 10, 2014]
    Hi guys, my car sometimes has a flat battery. The battery is new, the alternator is charging at 14 + volts. So i have something draining the battery. Any ideas? Do not think it is boot light as it goes off after a while when open anyway. Could it be alarm/central locking related? Could it be with the Audi navagation system in boot? how do i go about tracing what the drain is?
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  3. jbh
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    jbh TDi lover

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    [May 18, 2014]
    have you got a good multimeter that does amps?
    I would normally disconnect the earth of the battery put the multimeter to amps and place it between the earth of the battery and car. see how much amps are being pulled then work through the fuses until you find the circuit that is pulling a high draw.

    once you know which circuit is pulling loads of amps work through everything thats on this circuit until you find the offending item.
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  4. jbh
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    jbh TDi lover

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    [May 18, 2014]
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