so this I am hoping is a relay but unsure, turn key and nothing power leaves and sometimes comes back and will flicker or dim. turn again when power comes back and may start and then runs fine, also open drivers door and power might come back?.last night driver door wasn't helping I had nothing power wise then opened passenger door power came back started. sometimes when shutting car off and open door radio stays on sometimes it shuts off and then there is a buzzing in speakers...a gremlin maybe? any help would be great!!