most likely the alternator is bad.
the battery light means that your battery is being charged properly. so let it light.
If your engine is running , and the battery light comes on , that indicates that your battery is not being charged
It is very easy to reset the check engine light on a 2002 Volkswagen Cabrio. The negative battery cable can be taken off for one minute and replaced to reset the light.
Your battery is not being charged
Defective alternator or bad wiring.
The battery light usually comes on if there is a charging system problem Either battery or alternator are the usual causes.
The battery light comes on when the alternator output voltage is too low or too high. You have a wiring or regulator problem.The battery light comes on when the alternator output voltage is too low or too high. You have a wiring or regulator problem.
Resetting a service engine light on a 2008 Volkswagen r32 requires a diagnostic tool to be done properly. Another way requires disconnecting the battery for 5 seconds or more.
If the battery light comes on when you try to start your car, either your battery is low or your alternator is going bad. These can be checked by going to an Advance Auto or Auto Zone, they will test it for you for free.
There is no low battery light. There is however a light that comes on when the charging system has malfunctioned.