I had this problem. The alternator was fine, it was the battery that was bad. The alternator was "pegging" out the indicator bc it was trying to charge the battery, but it wasnt taking charge. Take the battery out and have it checked.
Obviously check the battery. Anyway, if the alternator, battery, and wires connecting them are good the voltage regulator is next on the list.
The battery has a temperature sensor. If it was left unplugged, the battery light will still be on
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.
did you unhook the battery before replacing the alternator
Check the battery with a vom meter while the engine is running. It should read about 14.5 volts and if so the alternator is working, than have the battery checked Now if the meter does not read 14.5 volts, have the battery, and the alternator checked. If they both check out okay, the problem is in the battery or the alternator circuit on the vehicle.
1. Disconnect battery cables. 2. Remove and replace alternator. 3. Reconnect battery cables. The alternator should be held in place by a couple of bolts. what about the belt tension
have your alternator check. It is like that for most car. It is not the battery's fault. But you could have a lose connection to your battery.
Charge the battery, start the car and check the battery with a volt meter. Should have over 14 volts, if only say 12.4 to 13, then change the alt. or check the wiring.
There isn't an alternator fuse. The alternator is the power source - it's not fed from another power source. That wire which goes to the positive terminal of the battery is there to transfer electrical power to the battery, not from it.
Check that alternator is charging battery properly and change battery to see if you still getting same issues. It can also be a leak in your car radio, burnt alternator diode, or a shorted coil in the central locking system or windows.
If your question is what may be a problem with a car that you have to change the battery after a new battery was installed a month ago? Then the alternator may be suspect and or a draw from the electrical system.
Remove the bolt retaining the heater hose clamp to the alternator adjusting bracketRemove the bolt retaining the negative battery cable to the alternator adjusting bracketif equipped if not remove the negative battery cableDisconnect the cable from the positive battery cableDisconnect the two electrical connectors from the rear of the alternatorRemove the bolt retaining the alternator to the adjusting bracketRemove the alternator pivot bolt and remove the alternator from the car