Thanks bounder39zman. I have ordered a new Prime switch. What you write makes sense. I don’t think I mentioned that I replaced the cracked Prime switch with one I had as a spare at home. Didn’t really think it would be critical but maybe it is. So I’ll wait for new switch and see then. On my diagram there are wires 15 to fuse, 14A (RED) to Fuel Pump shutoff valve and 14 to terminal connector. (15 does not go to FP). When I connect new switch it looks like 14A goes to middle prong., bottom one? To fuse and therefore top prong to terminal connector. Please correct me as I don’t want to wire this incorrectly.
Many thanks.