Yes Bob, I think you may be correct there, ive dug out the vendor info on the Omex 600. I'm hoping that the issue is that ive disconnected a supply that goes via the ecu to the relay, tomorrow's job! Of course, I've another issue my starter motor appears to be "shot", its just whirring as mentioned so once I've got the pump power supply issue sorted i need the engine cranking in order for the pump to run, as you'll know from the Omex info. Big challenge is to get those 2 starter motor mounting bolts out in order to get the motor off. I've actually removed the plugs and tried to crank the engine on the starter and it won't have it whjch makes me feel its "shot", the battery is a brand new 720 Amp job, Roll on, its time to pump the 40DCOEs and fire up the crossflow 7😣