Alternater, get it checked see how much it charges, maybe its playing up on ya, do u do a hard turn and it happens????? could be alternater not charging batter properly so u do hard turns where power steering uses allot of enerygy and u got ur headlights on and causes a problems( im just blambling what it could be dunno really not a genius lolz) , if it is a spirit i suggest u see a priest to bless your car,
"WHO YOU GONNA CALL???"