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Home >> Mazda >> 1988 >> RX-7 Turbo >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - EGI >> Component Testing >> Main Relay

Main Relay

  1. Turn ignition on. Check for relay clicking sound when ignition is turned on. Main relay is located behind left strut tower near the firewall.
  2. If no operating sound is heard, apply battery voltage and ground to the 2-pronged connector. See Fig 1 . Using ohmmeter, check that no continuity exists between terminals "A" and "B" or "C" and "D" when no voltage is applied. Check that continuity exists between terminals "A" and "B" or "C" and "D" with voltage applied. Replace relay if continuity reading is incorrect.
Fig 1: Checking Main Relay Continuity
G36022Courtesy of MAZDA MOTORS CORP.