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Home >> Lincoln >> 1971 >> Continental Automatic Trans >> Repair and Diagnosis >> Electrical >> Charging Systems >> Alternators - LEECE-NEVILLE 6000 & 6200 (40 & 53 Amp.) Series >> Testing (On Bench) >> Field Current Draw

Field Current Draw

  1. Connect ammeter from battery positive post to alternator insulated "F" terminal. Connect grounded field terminal to battery negative post. Rotate alternator slowly by hand and note reading. If below specifications, there is high resistance in slip rings or brushes. If above specifications, rotor coil is shorted.
  2. Disconnect lead from negative field terminal. Put a 110-volt test lamp between either field terminal and alternator frame. If test lamp lights, rotor coil is grounded.
    NOTE: One or both brush holders may also be grounded. Alternator must be disassembled to determine if brush holders or rotor is at fault.
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