Why is my new alternator and regulator not charging?
So I bought a new alternator and regulator, putted them in today, started up, all looked good on the meter (14-16 on the meter after a minute), then it went down to 11-12 and after a while, battery was flat again. No charging. Could I have fryed the regulator in some way?
How much does it cost to replace an alternator voltage regulator?
A new alternator voltage regulator will cost you anywhere from $40 to $140 for parts, heavily dependent on the make/model of vehicle and whether using OEM or aftermarket parts. The cost of parts doesn’t sound so bad, but since most voltage regulators are housed inside the alternator, expect to pay around $140 to $240 in labor.
What happens to the voltage when the alternator fails?
When the alternator fails, system voltage will drop to battery voltage, which will be at 12.8 or less, and declining as the battery loses charge. At somewhere around 9 to 11 volts, your electronic instruments and radios will cease to function.
Is the alternator at the heart of the charging system?
Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology. The alternator is at the heart of the charging system of your vehicle. Alternator problems and charging system problems can affect your vehicle in different ways.
So I bought a new alternator and regulator, putted them in today, started up, all looked good on the meter (14-16 on the meter after a minute), then it went down to 11-12 and after a while, battery was flat again. No charging. Could I have fryed the regulator in some way?
A new alternator voltage regulator will cost you anywhere from $40 to $140 for parts, heavily dependent on the make/model of vehicle and whether using OEM or aftermarket parts. The cost of parts doesn’t sound so bad, but since most voltage regulators are housed inside the alternator, expect to pay around $140 to $240 in labor.
Can a bad alternator kill a car battery?
A defective alternator can kill a battery if bad diodes or an internal voltage regulator prevents it from charging the battery. Or a diode can leak, allowing current to flow after the vehicle engine is shut off.
When the alternator fails, system voltage will drop to battery voltage, which will be at 12.8 or less, and declining as the battery loses charge. At somewhere around 9 to 11 volts, your electronic instruments and radios will cease to function.