Symptoms of a bad alternator include hard or slow cranking when you try to start your vehicle, lights that seem too dim, and of course the red BATT, ALT, or GEN light glowing on the dash. (A friend of mine once remarked that she'd never seen an alternator warning light on a car, ...
Symptoms of a bad alternator Proper alternator operation Alternator Testing with a voltmeter Temperature Compensated Alternators A bad way to test an alternator Voltage regulator tests Wiring tests Older Vehicle Regulators How long can a car run with a bad alternator? Bypassing the Voltage Regulator on...