can you still check to see if the alternator is bad by disconnecting battery while engine is running ?
Jan 17, 2006 at 9:41 PM
94 astro van electrical problems
1994 ALL OTHER MAKES ALL OTHER MODELS
SLSE4
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Repair Safety Notice:
This information is for general instructional purposes only. Vehicle repair can be dangerous.
Verify all information, follow manufacturer service procedures, use proper tools and safety equipment,
and consult a qualified repair shop when needed.
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Never disconnect the battery to see if the alternator is bad. If it is good, the voltage could go very high and damage the electrical systems in the car and even wipe out the light bulbs. Instead, check the voltage AT THE BATTERY with a good voltmeter with a charged battery, the engine idling, headlights on, and the heater fan running. You should measure 13.5 to 14.5 volts. If the voltage is low, the alternator is weak.
Jan 18, 2006 at 2:03 PM
you should see a constant 14 volt charge on you meter if the alternator is good, if it's bad your charge will go down little by little...take it off and take it in to have it checked
Jan 18, 2006 at 6:53 PM
If you do not want to check this yourself, bring your car to the local auto parts store if possible and they will usually check an alternator for free.
Jan 20, 2006 at 2:21 PM