Help Battery Light on Instrument Panel

[Black_Primera]

The battery light comes on dimly, very sporadically for about 30 secs max. Happens like once a day. Serviced alternator, changed battery poles but still happens. Any advice as to the cause and solution will be appreciated.

[BrotherHood]

Your battery on the way out I presume. Does the car tumble a little longer now for the car to start, especially on mornings? Test the battery itself with a voltmeter to see the battery's resting voltage. If it reads around 12.8-12.6, the battery is not the problem. However, if it reads way below that, i.e 12.0 and under, your battery is on the way out.

[zaria]

What vehicle?
Bat light indicates an issue with the charging system(alt) not sure if a dead bat will cause it to turn on.
If Alt is good then check for loose wiring,even a loose fan belt ,ay cause it.

[BrotherHood]

What vehicle?
Bat light indicates an issue with the charging system(alt) not sure if a dead bat will cause it to turn on.
If Alt is good then check for loose wiring,even a loose fan belt ,ay cause it.

You are quite right. Battery light would come on because the alternator isn't responding/available to charge the battery. For example a busted alternator belt would cause the light to come on.

[evolution91]

check ur fuses

[Strugglerzinc]

Could be any of a number of things with the alternator, brushes, rectifier, regulator etc.

If you still want to check the battery, check voltage on starting. If it drops below around 10.5 volts then you have a problem there.

[Black_Primera]

Thanks fellas....serviced alternator. When electrician checked voltage after when started, it was overcharging. He ran an additional wire on alternator (doh know what it is). Voltage was checked again, was fine. However light came on a couple times since. Will check belt.