So under normal conditions it looks like all four lockout relays should operate when the ignition is enabled, which then disconnects the respective loads for all four relays from the +12 VDC of the chassis battery.
Is relay #2 the only one with an issue? If yes does anything change if you remove relay 2 and replace it with a matching relay from another circuit ( I am assuming these relays are all the same) ?
The strange thing in your comments is when you pull out relay #2 and the loads for that relay still operate off the chassis battery. I would think that removing any of the four relays would stop the respective loads from functioning. Maybe a short cct from A4 to C5 on relay #2 base?
__________________
|