-The horn doesn’t work but the fuse is good and I can hear it clicking when I press the horn.

-The back doors only unlock halfway when using the unlock buttons on either the keyfob or door switches.

-The back left window doesn’t roll up all the way when using the front door switches.

-The rear left brake light doesn’t work at all.

-Sometimes the AC doesn’t turn on until I drive over a certain speed.

Could all of these problems be related or would they be individual issues?