In spite of the lack of information, I did find more relays, 5 to be exact. Hidden inside the back of the
SJB. All PCB mount. .No manuals address these or the fact that the
SJB is so complex. This might be some info to stick for a while. I now need a schematic for the
SJB, if theres one available. I can only imagine what a new
SJB would cost. Just to get the horn to work. Let me know if anyone can bring this further.
SJB_FRONT.jpg SJB_BACK.jpg