Quote:
Originally Posted by btwilson86
Before replacing the parts, do the test suggested earlier in this thread and check the voltage at the alternator and at the battery (with the car running). If the voltage at the alternator is higher than the battery, you likely have a bad connection somewhere in the charging system wiring. The voltage should be the same at both the battery and alternator, and you should have about 13.5 volts. If it's significantly lower, your alternator is likely bad and should be able to be tested at a parts store for free. Be sure to test it both with nothing extra turned on (lights, heater, etc) and with everything turned on and make sure it still produces that 13.5 volts.
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Ive done that with car not running then running. Loads on and off. The readings get lower and lower from cold to operating temp. I havent tested around when it starts to shut down which is about 15 to 20 mins. But when I go to work and park my car I turn on a load such as my efans or blower motor and everything shuts down