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Hi
2 of those 4 are fan relays I believe. One low speed and the other high speed driven from the ecu. Difficult to say for sure which position in the bank they might be in because it’s a Morgan…. The only sure way would be to buzz them through. The thick wires on the relays go to the large caged resistor in front of the radiator.
If your fan is not working check the 20p fan connector. Mine went intermittent and I replaced it.
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I also replaced my connector. It too failed.