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Home >> Geo >> 1993 >> Tracker Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Relays & Solenoids >> Relays >> EFI Main Relay
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EFI Main Relay

  1. EFI main relay is mounted on ECM, located under left side of instrument panel, near kick panel. See Fig 1 . Disconnect electrical connector from EFI main relay.
  2. Using ohmmeter, ensure continuity exists between Black/White and Blue wire terminals of EFI main relay. Apply battery voltage to Black/White wire terminal. Ground Blue wire terminal. Continuity should exist between Black/Red and Blue/Black wire terminals. Replace EFI main relay if continuity is not as specified.
Fig 1: EFI Main Relay ID
G91G17059Courtesy of GENERAL MOTORS CORP.