Car starting?

[SpoolN]

Went to the gas station today and filled my car up. When I went to leave my car would not start at all. I was gettin no battery power at all even when the key was in the 2 or 3 positioin. The car was acting like there was no battery in the car at all. I popped the hood checked all fuses check battery connections nothing. Car stayed like this for about 10 mins. Then out of no where i opend my door and noticed that my dome light came on and the car started right up??????? Could this bad engine grounds. If so where are they located?

 

[Nighthawk01]

first thing i would check are your battery terminals and wires. clean em up real good make sure there not curroded in anyway