If you can't take off the battery cable while running without the car dieing.
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
The car will be jumping( going up and down) you could only feel it when your car is at a stop.
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 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
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
If an alternator light keeps coming off and on, this may indicate that the voltage output of the vehicle is going up and down intermittently. This may mean the alternator may need to be replaced soon.
Voltage flows from the alternator not to it. If it is outputting no voltage it is defective.
Generally, as you face the car from the front, the alternator should be on the left side of the engine where the belt is. The belt drives the alternator. The alt in my '96 is right up top. You'll see an electrical connector going to it.
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.