Question about 2000 Chevrolet Blazer

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My car needing a jump threw out the day

When turning the ignition to on position to start my vehicle the gauges stands at no reading this is when i know i am going to need a jump, once my vehicle starts after jumping my car the gauges remains at no reading for approx. 10 sec. they then go to the normal reading thi is threw out the day.

Posted by Anonymous on

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  • Chevrolet Expert
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Ok I would have the battery tested. While testing battery make sure all connections are clean and tight on the battery terminals. If battery checks out to be good. Test the charging system, alternator. If alternator tests good make sure you belts are not slipping or worn and stretched out as this could cause a an inconsistent charge. While doing the battery test if posible do a draw test to see if anything is during current all the time as this could be draining or weakening the battery.

Posted on Apr 13, 2015

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It sounds like your battery won't hold a charge, common with older batteries. Have it tested, and replaced if needed.
Then, I would suggest you have the alternator checked as well. Only takes a voltmeter to test the alternator/charging system and see if it is putting sufficient current to charge a battery. You already know it is working good enough to keep everything going. Alternators DO run all the electrical systems and circuits when they are running. But they also have to put out enough to recharge the battery, so they must supply at least 13.5 volts for both jobs.
So here's how you check it with a voltmeter, and it is done all at the battery terminals: Measure battery voltage with engine off. A good battery should show at least 12.6 volts. A new battery may show close to 13 volts, but any good charged battery should have at least 12.6 volts. Then you start the car and measure battery voltage again. You are really measuring alternator output, but you can read it at the battery terminals. Now it must be at least 13.5 volts to know the alternator and charging system is as good as your (?new?) battery.

Posted on Apr 13, 2015

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