Dear diary: not a lot of work on bike today well progress wise, in fact I tended to rip her down a fair bit chasing wiring leads and found the wiring is a bit messy.
In total frustraition at not being able to find/borrow/steal/download a PZ wiring diagram I striped the right hand control off "again" after swearing never to touch it again after getting it back on and working the other day.
But it has been worthwhile, not only did I get to clean out the control's workings I also now have a clear idea of what does what and where the burned out wires have been replaced.
Oh for anyone else who has a pz650, the black and yellow wire is for the siren in association with the lose green wire connector and the controls marked O.P.M.S. stand for Off, Police lights, Mike (loud hailer), Siren.
Will wire in connectors tomorrow so that when I refit the light pole and siren they just need to be plugged in.
Will also strip the God awful red masking tape the PO used to rebind the whole loom (what was he thinking?) and replace it with a hundred metres of black.
Picture is of that mystery object I forgot to fit to clutch, just to remind myself not to be such a knob!