Rotor Open Or Short
- Adjust ohmmeter to lowest scale. Place each ohmmeter lead on rotor slip rings. See Fig 1
. Note ohmmeter reading. Reading should be 2.0-3.9 ohms.
- Reading exceeding specification indicates a damaged slip ring, welded connection or a broken wire. Low reading indicates a shorted wire or slip ring.
- Place one ohmmeter lead to a slip ring and remaining lead on rotor shaft. No reading should be obtained. Rotor coil is grounded to shaft if reading is obtained. Repair or replace rotor if defective.
Courtesy of FORD MOTOR CO.