These have a 28 volt dc coil and are supposed to change state every time they get a pulse. This one just thumped and had quit turning off and on,
disassembled and lubed with powdered graphite.
Bench test using a 20 volt laptop power brick. Relays are 28 volt so if 20 does it 28 should too.
New style 3000 relay in the middle of the image, It is wider and has screw terminals.
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