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Heater Relay

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