Hi Alister,
No the box with four relays in is not on the wiring diagram. The diagram is far from a comprehensive one with several wires not following what it shows in practice. I am certain that sidelights/headlights power enters the box from the h/lt switch. all the relays now seem to work. the headlight stalk switch when pushed away from you activates the solenoid in the box but the mode is stuck on high beam even with sidelights on. The search for wire crossovers continues.Thanks for your help with eliminating the Indicator Module.
rgds
Ian