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Control Relay Test

  1. Control relay is mounted on top of ECU. Disconnect electrical harness and test continuity between terminals "1" and "7", then "3" and "7". If there is no continuity, relay is good. If continuity is measured, replace control relay.
  2. Apply 12 volts across terminals "8" (positive) and "4" (negative) while testing continuity between terminals "3" and "7". If continuity is measured, relay is good. If not, replace relay.
  3. Apply 12 volts across terminals "6" (positive) and "4" (negative) while testing continuity between terminals "1" and "7". If there is continuity, relay is good. If not, replace relay.
  4. Apply 12 volts across terminals "5" (positive) and "2" (negative) while testing continuity between terminals "1" and "7". If there is continuity, relay is good. If not, replace relay.
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