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Home >> Geo >> 1991 >> Prizm Base, 4D Hatchback, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - A-240 "E" Series >> Component Testing >> Overdrive (Od) Switch

Overdrive (Od) Switch

  1. Disconnect electrical connector from OD switch, located on shift lever. Using ohmmeter, ensure continuity exists between White/Black and Light Green wire terminals of OD switch with switch released (OFF position).
  2. Ensure no continuity exists between White/Black and Light Green wire terminals with switch depressed (ON position). Replace switch if defective.