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Home >> Buick >> 2016 >> Cascada Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> DTC B249A or B3803: Windows Express Down/Windows Up >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the S134 Folding Top/Global Window Switch. Ignition ON
  2. Verify that a test lamp does not illuminate between the signal circuit terminals listed below and ground:
    • Signal circuit terminal 7
    • Signal circuit terminal 8
    • If the test lamp is ON 
    1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K9 Body Control Module.
    • If the test lamp is OFF 
  3. Test or replace the S134 Folding Top/Global Window Switch.