Sensitive topic for public board, but anyone got ideas/experience of a suitable under-dash signal cable which would safely act as an immobiliser when connected to a concealed switch. Obviously this is addition to existing Cat 1 - more to delay theft if keys stolen which seems to be the preferred method these days. Euro import so immobiliser is not Sigma with keypad. I have a vehicle/ECU wiring diagram already. Probably best to reply off-line to keep your secrets safe?

Thanks.