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Old 07-30-2005, 04:54 PM
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Current draw-how much is too much?

My battery was dead (8v.) after sitting for 2 days so I recharged to 12 v.& did an amp test inline with the positive battery cable. On the 10amp scale it only showed .01amps with everything off. Is this normal or should it be absolute zero??

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Old 07-30-2005, 05:26 PM
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depends

Depends on options. A clock or radio with clock will draw power. So will an alarm system. Other options can draw power when the car is off as well. I generally use a test light instead of an ammeter.
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Old 07-30-2005, 05:57 PM
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No radio, no clock ..not much really as its a '49 PU with later mustang running gear though it does have onboard compressor for the air ride suspension. I don''t think it draws unless needed to maintain tank pressure though.
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Old 07-30-2005, 06:15 PM
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A .01 amp draw will not drain a battery in two days. You need to disconnect your pump and see what happens (besides truck taking a squat).

Trees
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Old 07-30-2005, 07:19 PM
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.01 isn't even into surface leakage. Did you check the batt water level? If ok or uncheckable, charge the batt at 10 amps for 20 minutes and do a load check on the batt. It should maintain 12v for 10 seconds.(average test time) If it doesn't your batt is about to take a squat.
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Old 08-02-2005, 03:17 PM
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Cells

Doc here,

If you got a cell reading below 11 volts at anytime, you have a bad cell (s) Replace the battery..

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