Battery light comes on & goes off has new battery & alt checks out ok. on 1999 Oldsmobile Alero

Dash light comes on after car is on and moving. Goes off after a couple of seconds. Had new battery put in and checked starter & alternator. Both are good. Light is now staying on longer but still goes off in less than one minute.

by in Lees summit, MO on July 01, 2014
2 answers
ANSWER by on July 01, 2014
Most likely the alternator is starting to go. It may test ok because they generally don't put much load on it and it's a very short test cycle.
ANSWER by on July 01, 2014
Most likely the alternator is starting to go. It may test ok because they generally don't put much load on it and it's a very short test cycle.