So today at idle, the battery light is off. When accelerating, as soon as the RPMs go above 1800, the battery light comes on and stays on until the RPMs drop under 1800.
Using a multi-meter, the batteries read 12.75 at idle. Increase the RPMs to 1800-2200, and the battery voltage drops to 11.9-12.1 (at this point the battery CEL is triggered).
As the alternator is charging at 12.9, and the batteries appear to be full charged (12.7 at rest) I'm looking at possible other causes of the battery CEL to come on.
Alternator diodes?
Belt slipping?
Any suggestions from the TDS experts?
Using a multi-meter, the batteries read 12.75 at idle. Increase the RPMs to 1800-2200, and the battery voltage drops to 11.9-12.1 (at this point the battery CEL is triggered).
As the alternator is charging at 12.9, and the batteries appear to be full charged (12.7 at rest) I'm looking at possible other causes of the battery CEL to come on.
Alternator diodes?
Belt slipping?
Any suggestions from the TDS experts?