Pontiac Grand Prix supercharged gxp No battery charge

Robert · Tuesday at 5:11 PM

Whats the story? You need help or just saying no battery charge?

NORMANREH · Saturday at 9:56 PM

So I change the alternator and the battery just drains out while I'm driving it.

NORMANREH · 2026-11-01T00:52:22-0400

Robert said:
Whats the story? You need help or just saying no battery charge?

Yes I need help

Last Indian · 2026-11-01T15:34:17-0500

Have you used a multimeter to see that the alternator is putting out the proper voltage? Have you also used it to see what it’s doing at the battery? Have you had the alternator set a light?
It doesn’t sound like the alternator is putting out voltage. When the engine is running & the alternator is working properly you are running on the alternator’s power, not the battery.