How can I narrow down which component to change first. Starter, battery, voltage regulator, ignition switch?

1992 PONTIAC BONNEVILLE
98,000 MILES
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SODA6901
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1992 Pontiac SE Starting problem: All of a sudden when turning ignition nothing no noise. tapped the battery terminals and it started. No problem for two starts after.Then it happened again. I cleaned battery terminals. Tried jumping battery for 5 minutes. But battery wouldnt charge. Before I buy a battery, I can I determine if: Its the battery, voltage regulator, ignition switch or starter? I don't have a voltmeter.
Jun 7, 2012 at 4:33 AM
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MHPAUTOS
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You will need to get the alternator charge rate tested, and get a load test done on the battery, this should be done with a fully charged battery, i would start with these two tests first.
Jun 7, 2012 at 4:50 AM
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