Hello everyone!

I have a 81' 300TD, and the courtesy does not turn on when the driver door is opened!
I did a continuity test on the switch itself, and it is functioning correctly. Neither of the wires are supplying 12v's.

I've been having some issues trying to find any information on where those wires go / a wiring diagram.

Another question, do these earlier w123's have a door buzzer? Such as leaving lights on with the door open buzzer.

Thanks!