If your vehicle has a voltometer, the power will be low. If not, you can usually tell by dimming of the headlights or other electrical systems
When your battery does not get charge.
take it to autozone
it may be the starter going out doing it . it will kill the alternator if it keeps going . I know i had it happen to my 96 olds replaced the alt still didnt start and the starter fixed it
your alternator my be going out
Signs that your alternator is going bad will include but not be limited to: Electronics such as Stereo, CB, Etc turn off. Gauges such as Speedometer and Tach read in accurately or stop functioning. Motor won't start.
If you can't take off the battery cable while running without the car dieing.
Get a "multimeter" which is a device that measures many electrical currents and put the positive and negatives on the corisponding terminals of the alternator you should be getting a reading of 12 to 14 volts if this doesn't happen then your alternator is'nt working properly
Voltage flows from the alternator not to it. If it is outputting no voltage it is defective.
ALternator fuses, if equipped may be on the battery post, in a fuse box, or in the wire going from the battery to the alternator.
Usually no warning signs unless a bearing is going bad, Other than that it just stops charging the battery. what about overcharging? alternator is 10 months old, as is battery, same problem
undo the bottom bolt on the alternator and the top tension adjuster bolt. unbolt the ground wire going to it and pull the plug going to it. reverse all steps to put new alternator in.
There are a few reasons why your alternator might keep going bad such as rusty latches under the car. You may also have leaks, dents, or parts that need to be replaced on the vehicle that are effecting your alternator.