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Home >> Geo >> 1993 >> Prizm Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Relays >> EFI Main Relay (PRIZM)
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EFI Main Relay (PRIZM)

  1. EFI main relay is located in fuse/relay block on left front side of engine compartment. Remove EFI main relay from fuse/relay block.
  2. Using ohmmeter, ensure continuity exists between pins No. 1 (Black/Orange wire) and No. 2 (White/Black wire). Apply battery voltage to pin No. 1. Ground pin No. 2. Continuity should exist between remaining pins or wires on EFI main relay. Replace EFI main relay if continuity is not as specified.
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