WOMS
B code body Medium severity

B2535 Right Rear Turn Lamp Circuit Failure

The OBD2 code B2535 indicates a malfunction in the right rear turn lamp circuit, suggesting a failure in the electrical system related to the right rear turn signal light

Definition

The OBD2 code B2535 indicates a malfunction in the right rear turn lamp circuit, suggesting a failure in the electrical system related to the right rear turn signal light

Common causes

  • Faulty right rear turn lamp bulb
  • Damaged wiring or connectors in the circuit
  • Corroded or loose connections
  • Failed turn signal relay
  • Malfunctioning body control module (BCM)
  • Short circuit in the wiring harness
  • Grounding issues in the circuit

Common misdiagnoses

  • Faulty turn signal switch
  • Bad ground connection
  • Defective body control module (BCM)
  • Wiring harness issues
  • Malfunctioning relay
  • Incorrect bulb installation or type
  • Faulty rear lamp assembly
  • Corroded connectors

Troubleshooting steps

  1. 1. Visual Inspection

    Check the Bulb: Inspect the right rear turn signal bulb for any signs of damage or burnout. Replace it if necessary

  2. 2. Socket Condition

    Examine the bulb socket for corrosion, dirt, or damage. Clean or replace as needed

  3. 3. Wiring Inspection

    Look for any frayed, broken, or shorted wires in the turn signal circuit. Pay special attention to areas where the wiring may be exposed to moisture or physical damage

  4. 4. Test the Bulb

    Functionality Test: If you have a spare bulb, swap it in to see if the issue persists. Sometimes, bulbs can appear functional but still fail to make a proper connection

  5. 5. Check the Fuses

    Fuse Box Inspection: Locate the fuse box and check for any blown fuses related to the turn signal circuit. Replace any blown fuses and retest the system

  6. 6. Use a Multimeter

    Voltage Test: Use a multimeter to check for voltage at the bulb socket when the turn signal is activated. If there is no voltage, the issue may be upstream in the circuit

  7. 7. Ground Check

    Ensure that the ground connection for the turn signal circuit is intact. A poor ground can cause circuit failures

  8. 8. Inspect the Turn Signal Relay

    Relay Functionality: Check the turn signal relay for proper operation. If the relay is faulty, it may not send the correct signal to the right rear turn lamp

  9. 9. Check the Body Control Module (BCM)

    BCM Functionality: The BCM controls various lighting functions. If other lights are also malfunctioning, the BCM may be at fault. Check for any stored trouble codes in the BCM that could provide additional insight

  10. 10. Scan for Additional Codes

    OBD-II Scanner: Use an OBD-II scanner to check for any additional trouble codes that may be related to the issue. This can help identify if there are other underlying problems

  11. 11. Wiring Diagrams

    Refer to Wiring Diagrams: Consult the vehicle’s service manual for wiring diagrams to trace the circuit and identify any potential issues

  12. 12. Professional Diagnosis

    If the issue persists after performing these steps, consider seeking help from a professional mechanic. They may have specialized tools and knowledge to diagnose more complex electrical issues.Conclusion By following these troubleshooting steps, you should be able to identify and resolve the cause of the B2535 code. Always ensure safety precautions are taken when working with electrical systems in vehicles