First all headlights went out checked fuses relays all seem good. Battery good everything works except headlights. Now car won't start. It'll turn over if you make contact with relay but still not start. Plus at this time have to release shift lock to take it out of park

I stopped my car turned it off and when i tried to turn it back on i got no power anywhere. No dash lights no radio no headlights nothing. Battery still reads 12v and connections are fine... Brand new battery. Please help im out of ideas

So radio works fine as long as the key is turned to on position and the car isn't actually running. But as soon as u crank it up the radio screen goes blank , into off mode, and won't turn on and do anything. Everything else electrical seems to be working fine. No dim lights. However , one head lights goes out periodically. I do not know for sure that there is any relation between the two...