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Home >> Buick >> 2021 >> Envision Preferred, AWD >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> DTC B16C5 (TC2) >> Component Testing

Component Testing

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: E7AC Rear License Plate Lamp Module
  3. Test for infinite resistance between the test points: Signal terminal 3 & Ground terminal 1 - Switch - Not Pressed
    • If less than infinite resistance 

      Replace the component: E7AC Rear License Plate Lamp Module

    • Go to next step: If infinite resistance 
  4. Test for less than 3 ohms between the test points: Signal terminal 3 & Ground terminal 1 - Switch - Pressed
    • If 3 ohms or greater 

      Replace the component: E7AC Rear License Plate Lamp Module

    • Go to next step: If less than 3 ohms 
  5. All OK.