Is the Fuse Panel Grounded?

[Shtudwn]

Maybe dumb question here but I am dealing with a backup lights (dark green and light green) wire being burnt so bad that its a wonder it didn't catch fire! More on that if anyone wants to hear it....

So I have replaced the two wires and checked the backup switch. All good. but I was checking the fuse panel for continuity to ground and half of the circuits are grounded???? Is this the way it should be?

Thank you.