HELP!! battery charging problem

[bigballa_05]

i'm having trouble troubleshooting what is causing my battery to loose its charge while the engine is running. i'tll be at full 12v and within 5 min of running the engine it'll drop to almost 7v and then stalls out. you would think that its the alternator but i pulled it off and had a load test ran on it and it came out good. the battery was also tested and its good. i've tested the charge wire and also the wire that plugs into the alternator and they both are pushin 12v. also the check battery light stays on while the car is running. i've never had this problem before and it just started happening recently. but its so bad now that i can't even drive the car. anyone have any suggestions

[Ace]

Try a different alternator. Maybe it tests fine, but under load it's different.

[bigballa_05]

yeah i even tried a new alternator and still same result