Clean both ends of both battery cables and make SURE there is a good ground cable between the engine and body. If this fails, take it to auto zone and have them check the alternator output.
the common cause why the light is on is that your alternator is not working well,try to have your alternator checked .may be the carbon brush is already worn out.
Charging system is not working properly. Have the alternator tested at any auto parts store for free.
No. If the alternator is working fine, the battery power is not used.
needs a coil or distributor it could also be that the alternator isn't working and the car may be draining the battery every time you drive it
It depends on what kind of car you are working on, but it sounds like it can be an external voltage regulator, or even a fuse Some vehicles do not charge with out a rpm signal. The cause of the tach not working may also fix the alternator.
It doesn't actually drain the battery, but without a working alternator to recharge the battery it will only discharge as the car is operated.
I am having the same problem with a 99 Protege. I have changed the alternator and aligned/cleaned the pulleys and the problem persists.I replaced the alternator, on my 1997 Mazda Protege, seven times before someone figured out why the serpentine belt kept breaking. It was the belt tensioner! It had to be removed and rebuilt. Now it is working like a charm!! And I havn't had to replace the alternator in over 3 months!!!!
Depends on how low the battery is but give it 10-15 minutes and it will be fully charged, assuming the alternator is working properly.
alternator is not working so your battery isn't getting a charge
If the battery and alternator are good and the charging system is not working, then you either have loose or corroded wiring or the drive belt is slipping.
Most likely your alternator is not working properly.
The voltage regulator is not working properly.