Sometimes, with the vehicle running, you can remove the positive lead from the battery and the vehicle with either keep running or stop. If it stops that can mean the alternator is bad. This is not 100% accurate, depending on the type vehicle, etc.
bad alternator, bad voltage regulator, bad battery, bad connections.
run it and then disconnect the negative wire from the battery if alternator dies its bad.
The quick easy method for determining a bad alternator or at least to find out if it is charging, while the car IS running remove the negative battery cable from the battery, if the car stalls then you need to have the alternator service inspected.
You might have a bad battery, a poor connection between the battery and alternator, or a bad ground from the battery.
Battery light usually means alternator not charging. Most common solutions would be be a bad alternator, bad connection, or loose alternator belt. A replacement alternator can be bad. If it is ok than most likely a poor connection to the alternator.
It sounds like the alternator is bad. If the alternator is bad the battery will not hold charge when running
The answer is no . The battery starts you vehicle , the alternator charges the battery so if your alternator is bad your battery is not receiving a charge which will cause a "no start" condition.
Bad alternator? Bad voltage regulator? Bad Battery (won't take a charge)? Bad fusable link? Loose or corroded battery cables?
Check for a bad fusable link at 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.
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.
A bad alternator will have the effect of draining the battery, resulting in dim lights, trouble starting the car and the like. It would be best to replace the alternator as soon as possible and possibly obtain a new battery. This may vary depending on how much the bad alternator has drained it. You can get your alternator and battery checked any time at Auto Zone.