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Heater Relay

  1. Disconnect battery and check continuity with an ohmmeter. Continuity should exist between terminals "1" and "3" and between terminals "2" and "4". NO continuity should exist between terminals "4" and "5". If continuity does, or does not exist where specified, replace relay. See Fig 1.
  2. Apply battery voltage across terminals "1" (Positive) and "3" (Negative) and check continuity. Continuity should exist between terminals "4" and "5". No continuity should exist between terminals "2" and "4". If continuity does, or does not exist as specified, replace relay. See Fig 1.
Fig 1: Testing Heater Relay for Continuity
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