jeep wont start but battery is good
so i drove my jeep to my friends house today turned it off went inside for about 15 minutes then came back out to my jeep not starting up at all. all the lights on the dashboard were faded the radio wouldn't turn on, the light under the hood was barely glowing, and finally went out. we then jumped it. and i drove it home right when i got home the battery meter was pinned all the way to the right i turned it off it wouldn't start back up, so i then took the battery to advance auto parts and they said my battery was good with 12.7 reading. i then had a friend come by from the dealership and he's checking out my alternator tomorrow morning. any other ides of what it could be?
please help cause i need my jeep back.
when in doubt, press the skinny pedal!