Right got my car back on road there , now fitted a new alternator and bought a new battery also , now my greif is , now dont know if this is a problem now when i turn key to start car my battery light stays on and battery voltage is just above 12volts with engine running , now i give it a bit of throttle light goes out and shoots up to way over 13volts think about 13.9 roughly anyway its annoying me lol

Now the main one is when out at night , if i brake or put window up or down i can see my battery light slightly glowing faintly , and can see it glowing most of the time at night but more so when i do the above , why is this and is it anything to worry about , dont want my battery going flat etc

Thanks