Battery light flashes

TONYD235

MEMBER
2002 CHEVROLET ASTRO
4.1L
V6
2WD
AUTOMATIC
200,000 MILES

While driving the battery light flashes. I took the van to be serviced and the mechanic could not figure out the problem. I have a good battery and alternator. What could cause the battery light to flash? I was told the alternator is charging and my battery is good.

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good morning.

The light flashing may be an indication that there is an internal fault in the alternator.

When the alternator was checked, was the light flashing?

Roy

BATTERY
The IPC illuminates the battery indicator when the following occurs:
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
The ignition is on, with the engine off.

BATTERY NOT CHARGING
The IPC illuminates the battery not charging indicator in the driver information center when the following occurs:
The PCM detects that the generator output is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the PCM requesting illumination.
The IPC determines that the system voltage is less than 11 volts or greater than 16 volts. The IPC receives a class 2 message from the body control module (BCM) indicating the system voltage.

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