Question about 2001 Chevrolet Monte Carlo

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My battery periodically goes dead overnight, I have replaced the battery. It is ok. I put the charger on the battery and the car will go for months as if nothing is wrong. Some times I have noticed when I remove the key from the ignition that the ignition has not turned completely off but still allows me to remove it. This does not appear to be the case this last time. I could hear a clicking under the dash, static in the speakers, and the speedometer needle jumping slightly (may be the clicking under the dash) The battery was down to 4.5 volts not yet totally dead.

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Most likely you need a repair or new ignition key, but:
1. 4.5 V is too low, even once discharged so much, it can be damaged. So charge it with the charger, measure the voltage, leave it overnight at room temperature, but not the sleeping room, connect a headlight bulb or similar for about 10-20 mins and check the voltage.
2. As per the car, once you start the engine, fix the throttle a bit over idle and while having the voltmeter connected to the plus and minus just after the battery, remove the minus from the battery. If there is a current, battery is charging. There is also a regulator to avoid overcharging, but it is probably ok in your case.

Posted on Nov 12, 2009

  • Zlobomir
    Zlobomir Nov 12, 2009

    BE CAREFUL WHEN DOING ANYTHING NEAR RUNNING ENGINE!


  • Zlobomir
    Zlobomir Nov 12, 2009

    Thanks for pointing the exact voltages, tho with most of the budget multimeters it is hard to decide. Most 100% charged batteries I have checked with my multimeter showed about 14.8V (usually 6 cells * 2.smth volts each).  


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The clicking and jumping has to do with a lack of available voltage in the battery. It should be at 100% (12.6 volts) You need to find out why the battery is going dead and you need to know that the charging system is fine. (while the car is running, vehicle is charging between 13.5 and 14 volts) Maybe a light is staying on in the glove box, under the hood, or in the trunk. But don't confuse symptoms, You need to find out why the battery is being drained down, after that the other complaints should disappear.

Posted on Nov 12, 2009

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