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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting System >> Diagnostic Information and Procedures >> DTC B2585 or B3867: Left Park Lamps Control Circuit >> Circuit/System Testing

Circuit/System Testing

DTC B2585

  1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the appropriate left park lamp.
  2. Test for less than 10 Ω between the appropriate ground circuit terminal listed below and ground.
    • E2LF Side Marker Lamp - Left Front terminal 2
    • E2LR Side Marker Lamp - Left Rear terminal 2
    • E4N Park/Turn Signal Lamp - Left terminal C (without T4W)
    • E4AC Park/Daytime Running Lamp - Left terminal 3 (with T4W)
    • E5AA Tail/Stop Lamp - Left terminal 3
    • E5E Tail Lamp - Left terminal 3
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Connect a test lamp between the appropriate control circuit terminal listed below and ground, ignition ON.
    • E2LF Side Marker Lamp - Left Front terminal 1
    • E2LR Side Marker Lamp - Left Rear terminal 1
    • E4N Park/Turn Signal Lamp - Left terminal A (without T4W)
    • E4AC Park/Daytime Running Lamp - Left terminal 2 (with T4W)
    • E5AA Tail/Stop Lamp - Left terminal 2
    • E5E Tail Lamp - Left terminal 2
  4. Verify the test lamp turns ON and OFF when commanding the Left Park Lamps ON and OFF with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the X4 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    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 K9 Body Control Module.
    • If the test lamp is always ON 
    1. Ignition OFF, disconnect the X4 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit terminal 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 turns ON and OFF 
  5. Test or replace the left park lamp.

DTC B3867

  1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the appropriate right park lamp.
  2. Test for less than 10 Ω between the appropriate ground circuit terminal listed below and ground.
    • E2RF Side Marker Lamp - Right Front terminal 2
    • E2RR Side Marker Lamp - Right Rear terminal 2
    • E4P Park/Turn Signal Lamp - Right terminal C (without T4W)
    • E4AD Park/Daytime Running Lamp - Right terminal 3 (with T4W)
    • E5AB Tail/Stop Lamp - Right terminal 3
    • E5F Tail Lamp - Right terminal 3
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Connect a test lamp between the appropriate control circuit terminal listed below and ground, ignition ON.
    • E2RF Side Marker Lamp - Right Front terminal 1
    • E2RR Side Marker Lamp - Right Rear terminal 1
    • E4P Park/Turn Signal Lamp - Right terminal A (without T4W)
    • E4AD Park/Daytime Running Lamp - Right terminal 2 (with T4W)
    • E5AB Tail/Stop Lamp - Right terminal 2
    • E5F Tail Lamp - Right terminal 2
  4. Verify the test lamp turns ON and OFF when commanding the Right Park Lamps ON and OFF with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the X4 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    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 K9 Body Control Module.
    • If the test lamp is always ON 
    1. Ignition OFF, disconnect the X4 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit terminal 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 turns ON and OFF 
  5. Test or replace the right park lamp.
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