B1466 – Wiper Hi/Low Speed Not Switching

The ODBII code B1466 indicates a malfunction in the windshield wiper system, specifically related to the wiper’s ability to switch between high and low speed settings.

The severity of ODBII code B1466 is generally considered moderate.

Common Causes For: B1465 Wiper Brake/Run Relay Circuit Open

• Faulty wiper switch
• Malfunctioning wiper motor
• Damaged wiring or connectors
• Failed body control module (BCM)
• Poor ground connection
• Blown fuse
• Corroded terminals

Common misdiagnosis for B1466 Wiper Hi/Low Speed Not Switching

• Faulty wiper motor
• Defective wiper switch
• Wiring issues or shorts
• Malfunctioning body control module (BCM)
• Blown fuses
• Corroded connectors
• Faulty relay

Common Troubleshooting Steps

When dealing with OBD-II code B1466, which indicates an issue with the wiper system’s high/low speed switching, there are several common troubleshooting steps you can follow to diagnose and potentially resolve the problem. Here’s a structured approach:

• Check the Wiper Switch:: **Inspect the Wiper Control Switch:** Ensure that the wiper switch is functioning properly. Look for any signs of wear, damage, or corrosion.
• **Test the Switch:** Use a multimeter to check for continuity in the switch when toggled between high and low settings.
• Inspect the Wiper Motor:: **Visual Inspection:** Check the wiper motor for any physical damage or signs of wear.
• **Test the Motor:** Apply direct power to the wiper motor to see if it operates in both high and low speeds. If it only works in one speed, the motor may be faulty.
• Check Wiring and Connectors:: **Inspect Wiring Harness:** Look for damaged, frayed, or corroded wires in the wiper motor circuit.
• **Check Connectors:** Ensure that all connectors are secure and free of corrosion. Clean any corroded connectors.
• Examine the Wiper Relay:: **Locate the Relay:** Find the wiper relay in the fuse box or relay panel.
• **Test the Relay:** Swap the relay with a similar one (if available) to see if the issue persists. You can also test the relay with a multimeter.
• Check the Fuse:: **Inspect the Fuse:** Look for any blown fuses related to the wiper system. Replace any blown fuses and see if the problem is resolved.
• Scan for Additional Codes:: **Use an OBD-II Scanner:** Check for any other related trouble codes that may provide additional insight into the issue.
• Inspect the Body Control Module (BCM):: **Check for Faults:** If the wiper system is controlled by the BCM, ensure that it is functioning correctly. Look for any software updates or faults in the module.
• Perform a System Reset:: **Clear Codes:** After performing any repairs, clear the trouble codes and see if the code returns after a test drive.
• Consult the Service Manual:: **Refer to Manufacturer Specifications:** If the issue persists, consult the vehicle’s service manual for specific troubleshooting steps related to the wiper system.
• Seek Professional Help:: If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these steps, you should be able to identify the cause of the B1466 code and take appropriate action to fix the wiper speed switching issue.