B1407: Driver Power Window Up Circuit Open

Definition

The OBD2 code B1407 indicates that there is an open circuit in the driver power window up circuit, meaning the system is unable to detect the signal needed to raise the driver's side window

Common causes

Open circuit in the wiring
Faulty power window switch
Defective window motor
Poor ground connection
Blown fuse
Corroded connectors
Malfunctioning body control module (BCM)

Common misdiagnoses

Faulty window switch
Defective power window motor
Wiring issues or shorts
Malfunctioning body control module (BCM)
Broken window regulator
Battery or charging system problems
Incorrectly installed or damaged door panel
Faulty fuse or relay

Troubleshooting steps

1. Check the Fuse
2. Locate the fuse box and check the fuse associated with the power windows. If the fuse is blown, replace it and see if the issue persists
3. Inspect Wiring and Connectors
4. Visually inspect the wiring and connectors related to the driver power window circuit. Look for any signs of damage, corrosion, or loose connections. Pay special attention to the wiring harness in the door, as it can be prone to wear and tear
5. Test the Power Window Switch
6. Use a multimeter to test the power window switch for continuity. If the switch is faulty, it may need to be replaced
7. Check the Window Motor
8. Test the power window motor by applying direct battery voltage to it. If the motor does not operate, it may be defective and require replacement
9. Inspect the Window Regulator
10. Check the window regulator for any mechanical issues that may prevent the window from moving. If the regulator is damaged, it may need to be replaced
11. Scan for Additional Codes
12. Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues
13. Check Ground Connections
14. Ensure that all ground connections related to the power window circuit are secure and free of corrosion. A poor ground can cause circuit issues
15. Test the Body Control Module (BCM)
16. If all other components check out, the issue may lie with the BCM. Testing or reprogramming the BCM may be necessary, but this should be done by a professional
17. Consult Wiring Diagrams
18. Refer to the vehicle’s wiring diagrams to trace the circuit and identify any other components that may be involved in the power window operation
19. Perform a Visual Inspection
20. Look for any signs of water intrusion or other environmental factors that could affect the electrical components. If you are not comfortable performing these steps or if the issue persists after troubleshooting, it may be best to consult a professional mechanic for further diagnosis and repair

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check the Fuse

2. Locate the fuse box and check the fuse associated with the power windows. If the fuse is blown, replace it and see if the issue persists

3. Inspect Wiring and Connectors

4. Visually inspect the wiring and connectors related to the driver power window circuit. Look for any signs of damage, corrosion, or loose connections. Pay special attention to the wiring harness in the door, as it can be prone to wear and tear

5. Test the Power Window Switch

6. Use a multimeter to test the power window switch for continuity. If the switch is faulty, it may need to be replaced

7. Check the Window Motor

8. Test the power window motor by applying direct battery voltage to it. If the motor does not operate, it may be defective and require replacement

9. Inspect the Window Regulator

10. Check the window regulator for any mechanical issues that may prevent the window from moving. If the regulator is damaged, it may need to be replaced

11. Scan for Additional Codes

12. Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

13. Check Ground Connections

14. Ensure that all ground connections related to the power window circuit are secure and free of corrosion. A poor ground can cause circuit issues

15. Test the Body Control Module (BCM)

16. If all other components check out, the issue may lie with the BCM. Testing or reprogramming the BCM may be necessary, but this should be done by a professional

17. Consult Wiring Diagrams

18. Refer to the vehicle’s wiring diagrams to trace the circuit and identify any other components that may be involved in the power window operation

19. Perform a Visual Inspection

20. Look for any signs of water intrusion or other environmental factors that could affect the electrical components. If you are not comfortable performing these steps or if the issue persists after troubleshooting, it may be best to consult a professional mechanic for further diagnosis and repair