c1249 open in stop light switch circuit
C1249 Open in Stop Light Switch Circuit
OBD2 Code: C1249
Description: Open in Stop Light Switch Circuit
Definition: This code indicates that there is an open circuit detected in the stop light switch, which is part of the vehicle’s brake system. The stop light switch is responsible for sending a signal to the vehicle’s computer when the brake pedal is pressed, and an open circuit means this signal is not being properly transmitted.
C1249 – Open in Stop Light Switch Circuit
Typical Severity: Moderate
Common Causes
C1249 – Open in Stop Light Switch Circuit
Common causes:
- Faulty stop light switch
- Broken or disconnected wiring in the stop light switch circuit
- Corrosion in the electrical connections related to the stop light switch
- Defective brake pedal position sensor
Common Misdiagnosis
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OBD2 Code: C1249
Description: Open in Stop Light Switch Circuit
Common Misdiagnosis: Replacing the stop light switch without checking for wiring issues or blown fuses.
Common Diagnostic Steps
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OBD2 Code: C1249
Description: Open in Stop Light Switch Circuit
Common Diagnostic Steps:
- Verify the stop light switch operation by pressing the brake pedal and checking if the brake lights illuminate.
- Inspect the stop light switch for any visible damage or disconnection.
- Check the wiring harness and connectors for signs of wear, corrosion, or loose connections between the stop light switch and the control module.
- Use a multimeter to test for continuity in the circuit from the stop light switch to ensure there are no open circuits.
- Examine related fuses to ensure they are intact and functioning properly.
- If equipped, check for any additional diagnostic trouble codes (DTCs) that may provide further insight into potential issues with related systems.
- If all components appear functional, consider replacing the stop light switch as it may be faulty internally even if it appears undamaged externally.