737 ng warning lights
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According to one NG Wiring Schematic manual, Jon, the lights are supplied with power from either Battery Bus Section 3 or 28V DC Bus 1 section 2. The systems themselves provide an earth to activate the light. I don't believe Battery Bus Section 3 is hot. You will need the Battery Switch to be on.
I think you would need to look at each system to see if the earth was supplied to the lights with or without other sources of power. You might need a powered circuit to close a relay of some description to give you the earth, you might not.
Hope this helps?
Regards.
Q.
I think you would need to look at each system to see if the earth was supplied to the lights with or without other sources of power. You might need a powered circuit to close a relay of some description to give you the earth, you might not.
Hope this helps?
Regards.
Q.
