B1405 – Driver Power Window Down Circuit Short To Battery

The ODBII code B1405 indicates a short circuit in the driver power window down circuit, meaning there is an unintended connection to the battery, which can cause the window to malfunction.

The severity of ODBII code B1405 is moderate.

Common Causes For: B1404 Driver Power Window Down Circuit Open

• Shorted wiring or connectors
• Faulty power window switch
• Defective power window motor
• Malfunctioning body control module (BCM)
• Grounding issues
• Corroded or damaged electrical connections
• Aftermarket modifications or installations

Common misdiagnosis for B1405 Driver Power Window Down Circuit Short To Battery

• Faulty window switch
• Defective power window motor
• Wiring harness issues
• Malfunctioning body control module (BCM)
• Shorted or damaged wiring
• Incorrectly installed aftermarket accessories
• Faulty relay or fuse
• Grounding issues

Common Troubleshooting Steps

When dealing with OBD-II code B1405, which indicates a “Driver Power Window Down Circuit Short To Battery,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Verify the Code: Use an OBD-II scanner to confirm the presence of the B1405 code.
• Clear the code and see if it returns after a short drive. This helps determine if it’s a persistent issue.
• Inspect the Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors associated with the driver’s power window switch and motor for any signs of damage, fraying, or corrosion.
• **Look for Shorts: Inspect for any exposed wires that may be shorting to the battery or ground.
• Check the Power Window Switch: **Functionality Test: Test the power window switch for proper operation. A faulty switch can cause a short circuit.
• **Continuity Test: Use a multimeter to check for continuity in the switch when pressed.
• Test the Power Window Motor: **Direct Power Test: Apply direct battery voltage to the power window motor to see if it operates correctly. If it does not, the motor may be faulty.
• **Resistance Check: Measure the resistance of the motor. A shorted motor may show very low resistance.
• Inspect the Window Regulator: Check the window regulator for any mechanical binding or damage that could cause excessive current draw, leading to a short circuit.
• Check for Ground Issues: Ensure that the ground connections for the power window circuit are secure and free of corrosion. A poor ground can cause erratic behavior.
• Examine the Circuit: Use a wiring diagram to trace the power window circuit. Check for any other components that may be involved in the circuit that could be causing the short.
• Look for any aftermarket modifications that may have been made to the wiring.
• Check Fuses and Relays: Inspect the fuses related to the power window system. A blown fuse may indicate a short circuit.
• Test any relays associated with the power window system for proper operation.
• Scan for Additional Codes: Check for any other related trouble codes that may provide more context to the issue.
• Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the power window system for your specific vehicle make and model. There may be known issues or recalls.1
• Professional Diagnosis: If the issue persists after performing these steps, consider seeking help from a professional mechanic or automotive technician who can perform more advanced diagnostics.Conclusion By following these troubleshooting steps, you should be able to identify the cause of the B1405 code and take appropriate action to resolve the issue. Always ensure safety precautions are taken when working with electrical systems in vehicles.