It means the tester isn't giving you useful information. bridge rectifier could be failing.
replace or repair depending on what vehicle. some are economical to repair, some are cheaper to replace.
Repair the problem with the charging system causing the light to come on.Repair the problem with the charging system causing the light to come on.
Have the charging system checked. The light comes on when there is a charging system problem. it may be a battery, alternator or a battery problem.
Problem with the charging system.
The charging system is the alternator which is on and functioning anytime the engine is running. If not, then you have a problem with the alternator.
It means there is a problem with the charging system.
charging system excess or lack of field current
Your battery is not being charged because of a problem with the charging system Whether its a problem with the alternator / voltage regulator , the serpentine belt etc . you should have the charging system checked
Charging system problem. Normally this means there is a problem with the alternator.
It means there's a problem with your charging system.
You have a problem with the charging system.
Drive the car to your local auto parts store and they will test the charging system to determine what the problem is, at no cost.
It is not a batter light, it is a charging system light. It is on because there is a problem with the charging system. Most likely a defective alternator.