WOMS
B code body Medium severity

B1692 Autolamp Delay Circuit Short To Ground

The OBD2 code B1692 indicates a malfunction in the autolamp delay circuit, specifically a short to ground condition, which means that the circuit is improperly connected to the ground, causing it to malfunction

Definition

The OBD2 code B1692 indicates a malfunction in the autolamp delay circuit, specifically a short to ground condition, which means that the circuit is improperly connected to the ground, causing it to malfunction

Common causes

  • Shorted wiring or connectors
  • Faulty autolamp relay
  • Defective body control module (BCM)
  • Damaged or corroded ground connections
  • Malfunctioning autolamp sensor
  • Incorrectly installed aftermarket accessories
  • Water intrusion or moisture in electrical connectors

Common misdiagnoses

  • Faulty headlight switch
  • Defective body control module (BCM)
  • Wiring issues or shorts in the harness
  • Malfunctioning relay
  • Incorrectly diagnosed battery or charging system problems
  • Faulty sensors related to lighting systems
  • Issues with the vehicle's computer or software glitches

Troubleshooting steps

  1. 1. Check the Vehicle's Manual

    Refer to the vehicle's service manual for specific information about the autolamp delay circuit and wiring diagrams

  2. 2. Visual Inspection

    Inspect the wiring and connectors associated with the autolamp system for any visible damage, corrosion, or loose connections

  3. 3. Look for frayed wires or signs of wear that could cause a short to ground

  4. 4. Check Fuses

    Locate and check the relevant fuses for the lighting system. A blown fuse may indicate an underlying issue

  5. 5. Test the Autolamp Relay

    If the vehicle is equipped with a relay for the autolamp system, test the relay to ensure it is functioning correctly. Replace it if necessary

  6. 6. Use a Multimeter

    With the ignition on, use a multimeter to check for continuity in the autolamp circuit

  7. 7. Measure the resistance between the circuit and ground. A low resistance reading may indicate a short to ground

  8. 8. Inspect the Autolamp Module

    If applicable, check the autolamp control module for faults. This may involve testing the module's inputs and outputs

  9. 9. Check for Ground Issues

    Ensure that the ground connections for the autolamp circuit are secure and free of corrosion. A poor ground can cause erratic behavior

  10. 10. Look for Aftermarket Modifications

    If any aftermarket accessories have been installed, check to see if they are interfering with the autolamp circuit

  11. 11. Scan for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes that may provide additional context for the issue

  12. 12. Clear the Code and Test Drive

    After performing repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.1

  13. 13. Consult a Professional

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1692 code. Always ensure safety precautions are taken when working on electrical systems in vehicles