@SteveH - Your wiring is essentially stock wiring and does not fit the request as if the lights are off, the action will not happen with train presence.
@Siggy posted:is there a way to wire it so that the light can be controlled through a fixed voltage without it being controlled by track power?
Yes,
@bmoran4 posted:If you truly want to use a separate distinct power source for the light vs the actuating coil, then you are permanently modifying your structure to isolate the lamp from the coil.
But you can always just not connect terminal 3 and instead install your own independent lamp fixture like this with its own ground and hot connections:
