Alternators - LUCAS 1967-1972: Overhaul: Testing: Rotor

Connect an ohmmeter and read resistance of field coil (across slip rings). Using a 110-volt A.C. supply and 15-watt test lamp, check for insulation between one of the slip rings and any rotor pole. If lamp lights, rotor is shorted.

Fig 1: Lucas Integral Regulator Alternator ("ACR" Type)

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