Battery Warning Light stays on when running

[nonstop]

My '03 Vibe went between blinking the battery warning light and lighting it up solid. The battery failed a test (although 2 years old) with the cause suggested as a weak charge system. The battery also went dead when the car sits for 2 weeks. I installed a warranty replacement battery (Costco 800 CCA) and the light still acted up. Volts ignition off 12.8 and running 14.4. Changed the alternator and the light is still on. Volts now 13.2 and 14.8 which seem fine. I'm stumped. Does anyone have a schematic for the light source? Is this a computer problem? The alternator is brand new and I really don't want to pull it to test. A local shop is going to test the original alternator. Help would be appreciated.

[zionzr2]

might want to check the ground points for loose/coroded connections.

[nonstop]

Thanks, worth a try for sure. Is there a list on any of the forums for an '03 Vibe? Thanks