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Home >> Geo >> 1997 >> Metro Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests 1.0 & 1.3L >> Modules, Relays & Solenoids >> Relays >> Main Relay
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Main Relay

  1. Main relay is located in engine compartment relay/fuse box. Remove main relay from relay/fuse box. Using ohmmeter, ensure continuity exists between terminal No. 1 (White/Red wire) and terminal No. 2 (Blue/Black wire) of main relay.
  2. Apply battery voltage to terminal No. 1, and ground terminal No. 3. Continuity should exist between terminal No. 3 (White/Blue wire) and terminal No. 4 (White/Red wire) of main relay. Replace main relay if continuity is not as specified.
NOTE: Early Fuel Evaporation (EFE) heater may also be referred to as Positive Temperature Coefficient (PTC) heater.