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Home >> Cadillac >> 2017 >> XTS Base >> Repair and Diagnosis >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> DTC B0283: Rear Defogger Circuit >> Component Testing
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Component Testing

Relay Test

  1. Ignition/Vehicle - Off
  2. Remove the component:KR5 Rear Defogger Relay
  3. Test for 70 and 110 ohms between the test points:Component terminal 85 & Component terminal 86
    • If not between 70 and 110 ohms 

      Replace the component:KR5 Rear Defogger Relay

    • If between 70 and 110 ohms 
  4. Test for infinite resistance between the test points:
    • Component terminal 30 & 85
    • Component terminal 30 & 86
    • Component terminal 30 & 87
    • Component terminal 86 & 87
    • If less than infinite resistance 

      Replace the component:KR5 Rear Defogger Relay

    • If infinite resistance 
  5. Connect a 3 A fused jumper wire between the test points:Component terminal 86 & 12 V

    Connect a jumper wire between the test points:Component terminal 85 & Ground

  6. Test for less than 2 ohms between the test points:Component terminal 30 & Component terminal 87
    • If 2 ohms or greater 

      Replace the component:KR5 Rear Defogger Relay

    • If less than 2 ohms 
  7. All OK.