A/C clutch wiring diagram

Is anyone able to put their hands on a wiring diagram that shows how the Air Conditioning compressor clutch is wired in on a Pug 306 1.4 'S' reg, Build
code 7906 please ? The clutch fails to engage and am trying to trace the wiring from the switch on the dash and the relay through to the compress to find the fault.
Ta in advance, Tim.
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