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If it is not keeping the battery charged then it is defective. Start the engine and connect a volt meter set on 20 Volts DC to the battery posts. Red probe to positive and black to negative. You should get a reading of from 13.5 to 16 volts. Any less or more and the alternator is defective.
What else can I help you with?
How do you know you need a new alternator for a 2005?
alternator charging too high need replacing per dealer
Where is the alternator fuse on a 1997 expedition?
I have a 1997 ford expedition that the alternator is not charging the battery. Had the alternator tested and it was good the battery is new. Cant find the fuse for the alternator does anyone know where it is?
How do you know if you need a new alternator?
see this link How_can_you_tell_if_it's_your_battery_or_alternator_that's_bad
Alternator is new so is battery could it be a sensor?
The first step is to know the problem.
How to know the alternator is bad on 2003 Chevy Malibu?
You can have it tested at a auto pars store like autoZone. Another symptom is that if it has power issues, its the alternator I have the 03 LS and it needs a new alternator.
Where is the voltage regulator on cutlass supreme?
It's inside the alternator, most people just replace the alternator if it isn't charging but you can take the alternator apart if you know how and put in a new voltage regulator for about $15.
Changing an alternator in a 1999 Mercury Cougar?
i dont know if you have changed this alternator or not but if you have and the new one quit call me i know the problem mine went out 5 times before i figured it out. 252-814-9267
How do you know when you need an alternator?
A new battery or one that tested good is in the vehicle and the car is still losing power. the alternator is what charges the battery while the vehicle is operating.
Where is the alternator resistor on a 1994 Chrysler new yorker?
The alternator does not have a resistor.The alternator does not have a resistor.
Why is your new alternator not charging your new battey on your 1998 Mazda 626?
It may be a bad new alternator or it was not connected properly. Have the alternator tested to see if it is actually good.
How do you know that you need a new alternator 93 s10?
if your truck is running and you disconect the batery and the truck dies then its the alt
Do you have to readjust the alternator belt after put in a new alternator?
Yes.
