Question about 1996 Chevrolet Cavalier

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1996 chevy cavalier

Something keeps killing the battery and the alternator has passed the testing

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Linh Thanh

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1- If the battery is old, some of the cells are dead then it can never be fully charged. 2- There is possible current leakage when the key ignition is out. Here is a check. 3- Take off the wire connection to the alternator. Take off the car key. Use a Multimeter set to current measurement To measure in series from the positive terminal of the battery to the positive cable. ( of course you have to take off the positive cable from the battery.) Your measurement should be less than 15mA, Higher than that you have shortage some where. Starting take off all fuses. one at a time to see the leakage measurement reduce to locate which path is leaking. 4- Keep the measurement set up like this, connect the Alternator wire inis place, look at the muleteer to how is the leakage current measurement. Sometimes the diode in Alternator circuitry leak allow the battery current flow back to the alternator causing battery current drainage. 5- Due to some work involved in testing to find out leakage current, You better be sure your battery fully charged to stay with statement the battery is really good but draining current because of some leakage.

Posted on Sep 07, 2009

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