Hi guys..... new to the sight ......hope you can help ...... My wifes 99 Blazer's battery light came on ... so I checked the battery Amp's 12.1 V ..... checked the Altinator ..it's putting out 12v ...... tried to take it to the parts store so they could test the stuff and the dashboard went dead .. started running funny and died ..... towed it home , charged the battery and it started back up ...... Im thinking Alt ... but just went through the same kinda crap with my Ford and it was a relay ....... Im open to any and all suggestions including a .45 through the engine block ....... THX ....... C.