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Defogger Relay Test

  1. Remove defogger relay from junction block. See Fig 1 . Using an ohmmeter, check continuity between terminals No. 1 and 3. If continuity exists, go to next step. If continuity does not exist, replace relay.
  2. Apply battery voltage to terminal No. 3 and ground terminal No. 1. Relay should click. Check continuity between terminals No. 2 and 5. If continuity exists, relay is okay. If continuity does not exist, replace relay.
  3. Disconnect battery voltage and ground from relay. Relay should click. Check continuity between terminals No. 2 and 5. If continuity exists, contacts are sticking. Replace relay. If continuity does not exist, relay is okay.
Fig 1: Identifying Defogger Relay Connector Terminals
G95G14841Courtesy of CHRYSLER CORP.
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