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Home >> Cadillac >> 2018 >> XT5 Platinum >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System - Diagnostic Information And Procedures (DTC B093F - B3949) >> Diagnostic Information and Procedures >> DTC B093F >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X6 harness connector at the K9 Body Control Module, ignition ON.
  2. Verify the dome lamp cancel switch amber indicator does not illuminate.
    • If the dome lamp cancel switch amber indicator illuminates 
    1. Ignition OFF, disconnect the harness connector at the A98 Front Overhead Console Assembly.
    2. Test for infinite resistance between the control circuit terminal 17 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the A98 Front Overhead Console Assembly.
    • Go to next step: If the dome lamp cancel switch amber indicator does not illuminate 
  3. Install a 3 A fused jumper wire between the control circuit terminal 17 and ground.
  4. Verify the dome lamp cancel switch amber indicator illuminates.
    • If the dome lamp cancel switch amber indicator does not illuminate 
    1. Ignition OFF, disconnect the harness connector at the A98 Front Overhead Console Assembly, ignition ON.
    2. Test for less than 1 V between the control circuit terminal 17 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the A98 Front Overhead Console Assembly.
    • Go to next step: If the dome lamp cancel switch amber indicator illuminates 
  5. Replace the K9 Body Control Module.
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