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2003 Saab 9-3 Question: Why won't my battery turn over when using accessory power?

 

Question

WineSaab, Yountville, CA, January 12, 2012, 16:03
 Rookie

If I sit in the car and listen to the radio even for 5 minutes or have the keys in the ignition and door open when loading the car, the battery drains completely and I need to get a jump start. All other times the car starts with no problem. Also, there's a constant humming like something not turning off coming from the cigarette lighter and it's never used. Thanks!

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  • Medium-star Best Answer
    January 12, 2012, 20:36
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     Master

    You have a bad battery. Have it tested.

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  • Answer #2

    Hal... (see my shops), January 13, 2012, 07:44
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     Master

    Your battery is too old. Test the voltage while you're cranking it and you'll find it less than 10.5 volts which isn't enough juice to start the car.

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