How to check for drain on a battery?
05-12-2007, 01:39 PM
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How to check for drain on a battery?
i know you have to disconnect the negative battery terminal and put a multimeter in between the battery and the terminal and switch it to amps
if its pulling amps is it just a case of unplugging things to find out which unit is draining the battery? untill the multimeter reads 0 amps?
if its pulling amps is it just a case of unplugging things to find out which unit is draining the battery? untill the multimeter reads 0 amps?
05-12-2007, 02:34 PM
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Sounds about right, but remember something have constant live like alarm/immobilisers, clocks etc !
Minimal drain on them, but jus incase you forgot & ended up scratching ya head !
Minimal drain on them, but jus incase you forgot & ended up scratching ya head !
05-12-2007, 03:37 PM
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its a p reg micra, no central locking or alarm any idea what sort of amp draw is excessive? i know you need to let the vehicle stand down as well 
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06-12-2007, 06:35 PM
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Disconnect the earth side, connect a test lamp between the battery and the earth lead and see how much it glows it should just glow very slightly as the clock will draw a small current, if it lights up bright pull out one fuse at a time till the lamp dims then that will be the cicuit giveing trouble. make sure the interier lamp is not on as this will draw power.
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