Can't Connect to CAN

I'm in the process of wiring my PDM25+ in and struggling to connect to CAN Bus on the bench. I have an 8 button Blink Marine keypad and thought, initially, that that was the problem - it powers up normally but then it doesn't seem to connect to the PDM.

I've tried 'sniffing' the CAN Bus but get nothing from the PDM even when I try sending data . I've also sent data on the CAN Bus from several devices but nothing shows on the CAN Bus analyse, so it appears to be a connection problem with the PDM. I've tried every CAN speed setting and also swapped to CAN Bus 2 but with no luck. Wiring seems right and I've simplified it down to the bare bones as shown (excuse the WAGOS!). I'm running Firmware V116 on a PDM 25+ . Everything worked ok when I pulled this kit out of a previous race car.