Okay there should have the battery voltage or higher on both the red and green wires. Check the A1 terminal on the ignition switch for battery voltage with the engine not running but the ignition switch in the run position. Also make the terminals at the ignition switch are good as they are F56 terminals and the spring contacts can break causing loose connections.
Also sound the PTO clutch was trying to engage prior to relay being removed so that should indicate the relay is okay.
The relay was superseded from 109748X to 532109748.
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