Inside the cab 12volt power source.

2011 Toyota Tacoma
So I plugged in to the power source 12 volts. And it blew the fusible link to both the interior lights which was a 7.5. I replaced it and they work.
The power source for the 12 volt systems feasible link was still good. But it's not working I've even replaced the fuse just in case still not working. What the hell is going on? I wouldn't think that a relay would be bad I've tried to remove those with no luck.
You can see the 7.5s are a little taller than the originals. But everything seems to work other than the 12 volt power source in the cab.
I'm still scratching my head. Can anyone help me?