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To test if an alternator is functioning properly, start by checking the battery voltage with a multimeter; it should read around 12.6 volts when the car is off. Next, start the engine and measure the voltage again; it should increase to between 13.7 to 14.7 volts, indicating the alternator is charging the battery. Additionally, you can look for any unusual noises or signs of wear, and confirm that the alternator belt is tight and in good condition. If the voltage does not increase, the alternator may need repair or replacement.
What else can I help you with?
What can cause a battery light to come on when the battery and alternator both test good on a 1992 SC 400?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery.
Dodge avenger battery dead?
Charge it, replace it,test the alternator,Charge it, replace it,test the alternator,
Why is the Battery light stuck on in my 1996 ford contour battery seems to be fine along with the alternator...?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery.
Why does the battery light come on a 1996 Ford Exployer after changing the battery and having the alternator checked?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery.
What would make the Battery light come on after changing the alternator and checking the battery in a 92 Chevy c1500?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery.
How do you troubleshoot the alternator when it will not charge and has 15V coming out of it that is not going to the battery after changing the thermostat on a 1997 Dodge Ram Van?
If the alternator tests out OK (most auto parts stores will test one for free), then follow the large wire from the alternator to the battery and test continuity. There is probably one or two fuses or fusible links. Hope this helps. Mark
ok about test?
ok about test
My 93 Mercedes Benz the light of the battery came on when i was driving. I change the battery recent and the altornator so what could it be.?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery.
How do test your alternator while in the car and the car will not start?
Car would either have to be running or alternator removed for bench test
Why wont your battery light go off when you changed your alternator and battery in your 99 mercury cougar?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)
Your 1997 ford ranger battery light is low and the battery keeps dying is it the alternator?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. You may also have a battery drain (something that is staying on and killing the battery)
What would cause battery light to stay on in a 1998 ford taurus. I have had the alternator checked and was told it was good.I have replaced the battery and still battery light stays on?
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. If the battery and alt test ok than check the connections to the alternator and battery. The alternator should have 2 connections.
