Parking lights not working

[R8DX5]

I have a weird problem. The parking lights on my X does not work. There are no faults on the OBD.
There are 4 positions on the light switch. Here are the results:
Auto: All lights are ON automatically when the proper darkness in sensed
Off: All lights are OFF
Park: All lights are OFF
Full: All lights are ON

*All lights = tail lights, head lights, license plate lights & in-dash lights
The fog lights works when activated in the Auto & Full positions.

Could it be a fuse/module? I've tested it with a voltage meter and found that no electrical current is received with the switch in the PARK position. Also, electrical voltage fluctuates in the FULL position causing the tail lights to flicker ever so slightly (barely noticeable).

Any ideas?