All.
A quick update:
I have removed the binnacle, the bulbs/holders remind my of wiring the Xmas tree lights. Now that I can get a multimeter to them several don't seem to be making proper contact.
With the binnacle removed the 'door lock' indicator still flashes with the indicators so I am still looking for additional problems.
I have however managed to geth the LHS door lights to work without the key. It seems the buzzer box connection (which the wiring diagram seems to indicate is supposed to ground with the key) was switched with the door light ground.
John Chapelhow DOC 19 : 'Boeing' 0737