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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 488 (Lighting System - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Dome Lamps Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Dome Lamp Switch Malfunction

  1. Ignition OFF, scan tool disconnected, all doors closed, all accessories OFF, disconnect the harness connector at the S30 Headlamp Switch. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 5 Ω between the ground circuit terminal 8 and ground.
    • If 5 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 5 Ω 
  3. Ignition ON.
  4. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Door.
    • If Cancel 
    1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the signal circuit terminal 9 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
    • If On 
    1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the signal circuit terminal 12 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
    • If Door 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 9 and ground.
  6. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is Cancel.
    • If not Cancel 
    1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 9 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Test for less than 2 Ω in the signal 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 Cancel 
  7. Install a 3 A fused jumper wire between the signal circuit terminal 12 and ground.
  8. Verify the scan tool Interior/Courtesy Lighting Master Switch parameter is On.
    • If not On 
    1. Ignition OFF, disconnect the X2 harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 12 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Test for less than 2 Ω in the signal 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 On 
  9. Test or replace the S30 Headlamp Switch.

Dome Lamp Malfunction

  1. Ignition OFF, scan tool disconnected, all doors closed, all accessories OFF, disconnect the harness connector at the inoperative dome lamp listed below. It may take up to 2 min for all vehicle systems to power down.
    • E37E Dome/Reading Lamps - Front Overhead Console
    • E37B Dome/Reading Lamps - 2nd Row
    • E37C Dome/Reading Lamps - 3rd Row
    • E8J Instrument Panel Courtesy Lamp - Left
    • E8K Instrument Panel Courtesy Lamp - Right
    • E8B Door Sill Plate Lamp - Passenger
    • E8A Door Sill Plate Lamp - Driver
    • E8M Liftgate Courtesy Lamp - Left
    • E8N Liftgate Courtesy Lamp - Right
  2. Test for less than 5 Ω between the appropriate ground circuit terminal listed below and ground.
    • E37E Dome/Reading Lamps - Front Overhead Console terminal B
    • E37B Dome/Reading Lamps - 2nd Row terminal B
    • E37C Dome/Reading Lamps - 3rd Row terminal B
    • E8J Instrument Panel Courtesy Lamp - Left terminal B
    • E8K Instrument Panel Courtesy Lamp - Right terminal B
    • E8B Door Sill Plate Lamp - Passenger terminal 1
    • E8A Door Sill Plate Lamp - Driver terminal 1
    • E8M Liftgate Courtesy Lamp - Left terminal 1
    • E8N Liftgate Courtesy Lamp - Right terminal 1
    • If 5 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 5 Ω 
  3. Connect a test lamp between the appropriate control circuit terminal listed below and ground, ignition ON.
    • E37E Dome/Reading Lamps - Front Overhead Console terminal C
    • E37B Dome/Reading Lamps - 2nd Row terminal C
    • E37C Dome/Reading Lamps - 3rd Row terminal C
    • E8J Instrument Panel Courtesy Lamp - Left terminal A
    • E8K Instrument Panel Courtesy Lamp - Right terminal A
    • E8B Door Sill Plate Lamp - Passenger terminal 2
    • E8A Door Sill Plate Lamp - Driver terminal 2
    • E8M Liftgate Courtesy Lamp - Left terminal 2
    • E8N Liftgate Courtesy Lamp - Right terminal 2
  4. Verify the test lamp turns ON and OFF when commanding the Courtesy Lamps ON and OFF with a scan tool.
    • If the test lamp is always OFF 
    1. Ignition OFF, disconnect the X2 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 X2 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 inoperative dome lamp.
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