The Green/R MUST come to and go through the bulkhead on one pin. It surely is either T or L It's ONLY job is to carry switched 12V from the horn relay, through the bulkhead, and out to the horns. NO OTHER wire should be spliced into that.
Sorry 67Dart, the Valiant schematics, which should be the same more or less, shows engine side L for horns (where it is on my car) but inside is T and that cannot be as T comes off the starter relay. But I think I'm getting closer, the schematic DOES show how the headlight buzzer wires in and its association with the horn relay, and I think the problem might be in the steering column. As I said I don't think its original. Ill crack it open tomorrow to have a look.
