This is a system test that indicates the battery light on the dash along with any monitored components of the charging system are working as expected.
Red battery light car.
The battery light is the only warning indicator for the electrical charging system of your car and should never be ignored.
This can be a result of a malfunctioning alternator a battery going bad or a number of other things.
Basically if you see the battery light going on in your car you shouldn t expect to be able to drive it for very long.
It s important to know how to respond when your car s battery light goes on.
Your car s battery light is an indicator of when your car s charging system is malfunctioning.
Every time the vehicle starts up the battery warning light should briefly turn on then back off after a few seconds.
Top reasons a battery light comes on.
The car s battery light coming on generally means that there is something preventing your car s electric system from charging off the battery.