Battery Light On But Alternator Is Good. Once the battery light is on with the voltage above 13 volts, there’s something wrong with the alternator. It is charging the battery when it speeds up though.
Boulder7 june 20, 2019, 1:06pm #5. It can also be because of a faulty or worn alternator or the wirings to it. Ah, this is because, despite being a picture of a battery, the light is actually telling you that the alternator is not charging the battery.
Persistent Battery Light After Battery Or Alternator Replacement.
* there are a number of possible reasons: Boulder7 june 20, 2019, 1:06pm #5. The battery light is on but the voltmeter says 13.5 to 14.5 volts depending on the engine revs.
Also The Battery Could Be Being Drained Overnight.
Please subscribe to the channel y. When engine is off the volts drop to about 12. If it’s providing a good output, then inspect the cable carefully.
Disconnect The Battery In Step 2:
Can an alternator test good but still be bad? I read someplace that you had to log eight hours for the computer to reset and the light to go off, but now have 20 hours since the change / upgrade and the light. Up to $8 cash back the alternator warning light means there is an issue with powering the battery.
Check That The Battery Is Fully Charged:
The most common reason for a car battery light on while driving is a broken auxiliary or serpentine belt. I will go out and ask the alternator store to check the original one for bearing and brushes replacements. Now measure the voltage at the battery.
The Battery Light Is Lit Due To A Significant Miss Match In.
It can also be because of a faulty or worn alternator or the wirings to it. Had the batteries and alternator checked once off the truck, and twice on the truck, tested good. When your “ service charging system ” light turns on, one of the first things you should do is check sure the battery is charged.