I am assisting a friend in getting his 85 XJS on the road again. It has been standing outside for some years and now the tail lights, indicator lights, dash lights and instrument gauges are all dead. The headlights come on and switch normally from high to low beam. I have checked and cleaned all fuses in engine bay and footwells and cleaned all grounds that I can see. I assume there are relays controlling these functions but do not know where they are. I cannot find these circuits on line. Any help will be appreciated.
John