I didn't answer because I'm not familiar with the term "Docking Lights".
My notes have a dash-switch referred to as "Fog Lights" but the wire colors don't match. On my Sun Voyager, they are supposed to be green.
The switch wires lead to a relay coil for the "Fog Light Relay" in the electrical compartment. It is fused by a 15 amp fuse in the fuse block.
That section of the fuse block is powered by one of the 2 "Ign/5" power relays.
However, if you have power to the switch, you do have power to the relay as well, & the fuse is OK. THe power for the dash-switch is taken right off the input to the relay. The relay could be bad, or unplugged. From the relay "output", wiring goes directly to fog lights thru a "Packard Connector". The other side of each lamp is chassis grounded, individually.
I remind you again, this is for a Sun Voyager, Workhorse chassis.
Let me know if we are even talking about the same lights.