Take this info with a big old grain of salt (due to effectivity issues) but if you apply 28VDC to pin 20 of the annuciator and apply the source ground to pin 19 and press the test button, you should get them all to light up. Applying the source ground to pin 21 (with 28VDC to pin 20) should eliminate the need for pressing the button.
Alternately, you can get individual lighths to light up by applying 28VDC to pin 21 and grounding individual pins. Some pins may cause a light to come on, some may not, depends on the internals. Carefule, all these light assemblies have non-replacable fuses and diodes.
For the indicators, ground pin 6 and apply 26VAC to pin 5 and you should get the internal lighting to work.
I can't tell you anything about the interconnect light, because the connector appears non standard, but the typical configuration for that type of base assy is:
lug 3 - test power (28VDC)
lug 1 - ground
lug 2 - sytem indication
In other words, if you apply 28VDC to lug 3 and ground lug 1 and then press the lens, the light should come on. Applying 28VDC to lug 2 and grounding lug 1 should illuminate the light without having to press the button. These lugs are located on the backside of the panel on the light itself.
For panel (plate) lighting, you'll have to experiment with that non-standard connector. You should be able to eliminate 3 of the pins by tracing the wires back from the green light assy. Then apply 28VAC to one of the remaining pins and ground another until you have the right combination.
All that being said, here's the disclaimer: THIS INFORMATION IS
ONLY GOOD FOR
OUR AIRPLANES WIRED PER
OUR WIRING DIAGRAM. THE PARTS YOU HAVE MAY OR
MAY NOT BE
WIRED THIS WAY.
I'm mildly concerned with the non-standard connector, but it's your choice whether to apply power or not. Don't hurt yourself.