HELLO I HAD PUT A NEW BATTERY AND ALTERNATOR ON MY CAR NOW WHEN I START IT UP IT RUNNES UNTIL I TAKE THE CABLE OFF IT SHOULD BE RUNNING BUT IT STOPS WHAT SHOULD I DO
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1999 Ford Taurus Question: PROBLEMS WITH ALTERNATOR
Answer #1patrick mannion from Greg Solow's Engine Room, August 15, 2010, 09:10Master
Don't disconnect a battery cable or alternator power cable with the engine running it causes a surge in current that can damage the alternator. Turn on the ignition switch to the on but not run position do you see an icon on the instrument panel representing a battery, if you do not see this battery icon the alternator is not seeing power to allow it to charge. Start the engine does the battery icon go out. Put a volt meter across the battery terminals with the engine off, at rest the battery voltage should be 12.6 volts if the battery is fully charged. Now get a friend to start the car while you watch the voltmeter, the voltage reading across the battery should read approximately 14.6 volts if the alternator is charging correctly.