Thanks Frank,
your help is on the spot - as always!
To clarify: I have no clue as to how the remote receiver operates - and there is no bit of documentation on that. It took me a number of emails with the supplier and some online research to find the wiring diagram as shown. We simply have to take as a starting point that “it switches” and that there are two different switching designs:
(1) use K and G: the connection is normally interrupted; operating the switch will close the circuit (which is what I’d need to operate the door lock solenoid relays.
(2) use B and G: the connection is normally closed; operating the switch will open the circuit.
I have confirmed this operation mode in principle with a DMM.
The designation “Power supply for loads” on the right side of the sketch seems to suggest that the RC switch is sitting on the negative side of the load, which is the wrong side for me. Your advice to “reverse” the relay connection and the door lock switch confirms my impression - I’ll think about the effort it’ll take!
Do you have any idea whether there are switches out there capable of switching the power wire? It might be easier to wait and search than turn into one of the dreaded POs that fooled around with the wiring …
Thanks again and best wishes
Jochen
75 XJ6L 4.2 auto (UK spec)