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Home >> Suzuki >> 2012 >> Equator Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Lighting Systems) >> Diagnostic Information and Procedures >> Courtesy Lamps Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.

Dome Lamp Switch Circuit Testing 

  1. Ignition OFF, disconnect the harness connector at the dome lamp switch.
  2. Ignition OFF, test for less than 1 Ω of resistance between the ground circuit and ground.
    • If greater than 1 Ω, test the ground circuit for an open/high resistance.
  3. Verify the scan tool door lamp command parameter is OFF.
    • If the dome lamp command is not OFF, test the signal circuit for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3-amp fused jumper wire between the voltage supply circuit and ground. Verify the Scan Tool Dome Lamp Command parameter is ON.
    • If the dome lamp command is not ON, test the signal circuit of the dome lamp switch for a short to voltage or an open/high resistance. If circuit tests normal, replace the BCM.
  5. Install a 3-amp fused jumper wire between the voltage supply circuit and door signal circuit. Verify the Scan Tool Dome Lamp Command parameter is ON when a door is in the open position.
    • If the dome lamp command is not ON, test the signal circuit of the dome lamp switch for a short to voltage or an open/high resistance. If circuit tests normal, replace the BCM.
  6. If all circuits test normal, test or replace the dome lamp switch.
    NOTE: This test can be performed on any of the door ajar switches.

Door Ajar Switch Circuit Testing 

  1. Ignition OFF, disconnect the harness connector at the inoperative door ajar switch.
  2. Ignition OFF, test for less than 1 Ω of resistance between the ground circuit and ground.
    • If greater than 1 Ω, test the ground circuit for an open/high resistance.
  3. Verify the scan tool dome lamp command parameter is OFF.
    • If the dome lamp command is not OFF, test the signal circuit for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3-amp fused jumper wire between the voltage supply circuit and ground. Verify the scan tool dome lamp command parameter is ON.
    • If the dome lamp is not ON, test the signal circuit of the door ajar switch for a short to voltage or an open/high resistance. If circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the door ajar switch.
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