Alernator problems

As we pulled into Walmart to get some fuel, Glenn noticed the engine light went off or on. Was it the battery? Or alternator?
We googled Auto zone and there was one just down the street. Tested. TheMeer informatie
As we pulled into Walmart to get some fuel, Glenn noticed the engine light went off or on. Was it the battery? Or alternator?
We googled Auto zone and there was one just down the street. Tested. TheMeer informatie