Rear foglight

Hi all

Looking out the window and my rear foglight is stuck on on my 197 Cup. I'm going to take the bulb out now so it doesn't flatten the battery, but has anyone heard of this issue before?

Thanks in advance.
 
Not heard of this one before, cup means no auto lights so I aren't too familiar, but do they have the 'parking light' that leaves a light on when the engine is off, supposedly so nobody hits you.
 
I'm thinking relay or switch? Hope the damn thing doesn't spontaneously combust before I sort it.

Anyone have access to a wiring diagram?!

Cheers