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Home >> Buick >> 2017 >> Envision Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> DTC B0283: Rear Defogger Circuit >> Component Testing

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 1 & Component terminal 2
    • 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 3&1
    • Component terminal 3&5
    • Component terminal 3&2
    • Component terminal 2&5
    • 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 2 & 12 V

    Connect a jumper wire between the test points:Component terminal 1 & Ground

  6. Test for less than 2 ohms between the test points:Component terminal 3 & Component terminal 5
    • If 2 ohms or greater 

      Replace the component:KR5 Rear Defogger Relay

    • If less than 2 ohms 
  7. All OK.