Trunk and back seat lights flicker but won't stay on

Hi my name is Justin. I am glad to be apart of the fourm and chats. I just purchased a 95 4runner about a month ago. I noticed the previous owner had the interior lights off. I tried to turn them on but the bulbs were broke . So anyways I was going to install led bulbs inside anyhow. I have now installed the bulbs and the lights on the door panel come on but not the other lights (in the trunk and in back seat). The bulb will flash a bit and come on and off when the doors are open. So it's not a fuse I'm assuming and the bulbs are good. What could it be maybe a connection issue. I appreciate the help.

 

I would say either the connectors or the wiring. Good luck finding it. Doesn't help much I know. I hate electrical gremlins.