Darren:
I also have a 54....double check the wire connections on the inner fender on both sides.
On the drivers side.. the wires from the light switch will terminate on the inner fender torwards the front at a multi-connector terminal ( can't remember the real name). Then a separate length of a wire bundle will attach to the terminal go across the radiator area to the passenger inner fender to another multi terminal. Wires go from the terminals to parking lights and headlights on both sides.
Make sure there is a good ground.

If you need to replace the wiring harness...Chevy classics has one for about $ 150.00...very easy to install, all wires marked. When done you'll know wires are good and you won't have to worry about faulty previous Owner makeshift wiring....

1954 Chevy 3100 5-Window
In the Stovebolt Gallery
More pix on Photobucket

"True victory is victory over one's self."
Krav Maga isn't pretty ... but it works just fine.

Jimmi V.