Out of my depth on what I hoped would be a simple like for like replacement. Customer has tried to change their own PIR but new one doesn’t work. New and old look the same but old one had five terminals and new one 4. New one has instructions what just show a simple line and neutral in and line and neutral out wiring diagram. However old one was wired with a single cable with the cables identified as Earth Grey marked as blue neutral Black marked as brown switched live Brown live Black jumper cable between live and switched live terminals. Doesn’t matter what I try I can’t get the new one to work and don’t have the knowledge to work out why. All I know is that nothing makes it work and nothing makes the RCD trip either. Could be new and faulty? Could be the customer has fiddled with something I don’t know Could be a fault elsewhere on the circuit. For some reason he’s decided that the PIR is faulty and bought the new one to replace it. Could be I’m an idiot. Pictures below show how it was apparently wired before, the bare wires as left for me to look at, and the new terminals. Help appreciated many thanks.