Sorry for the generic title of this message I didn't'[t know what
else to call this.

I have a 93 Honda Civic EX coupe.

For about a year now when I turn the headlights on, the interior lights
and tail lights would not come on.  In order to get those lights to
come on I would turn the knob for the lights about halfway between all
on and just parking lights on.  I figured the knob was just bad and
didn't worry about it too much, I mean the car is old and it seemed
like a small thing.

Well over the last few days the tail lights and interior lights won't
come on at all now, even with my play with the knob that turns them on.

Here is what I am worried about, what if the knob was working just fine
and me messing with it was just shorting out a circuit that allowed all
the lights to come on.  I am guessing there must be a relay of some
sort that turns all of the lights on.

What is this relay called and where is it located?  I would like to
replace it, but have no idea of what would control these lights.

As of right now the car has headlights when the knob is turned all the
way on, but never has tail lights or interior lights.

Thanks in advance for any help.