This wiring diagram is
taken from my 1983 Rainbow II, it should also work with the Prestige
150 and 250 as they have the same controls (3 way switch, 2 volume and
2 PEQ tone controls).
The volume pots are 500K log/audio, capacitors C1 and C2 are 0.022
microfarad Mylar. The PEQ tone pots were specially made for, and
patented by, Matsumoku. They are not a standard part and there is no
commercially available equivalent today.
1 - these earth/shield cables are soldered to the body of the pickup selector switch 2 - for clarity these wires are shown as blue on the diagram, on the guitar they are white
