B1633 – Mirror Driver Left Circuit Short To Battery

The ODBII code B1633 indicates a short circuit in the left mirror driver’s circuit, causing it to be continuously powered as if it were connected directly to the battery.

The severity of ODBII code B1633 is moderate.

Common Causes For: B1632 Mirror Driver Left Circuit Open

• Shorted wiring or connectors in the left mirror circuit.
• Faulty left mirror assembly.
• Damaged or corroded connectors.
• Malfunctioning mirror control switch.
• Grounding issues in the circuit.

Common misdiagnosis for B1633 Mirror Driver Left Circuit Short To Battery

• Faulty left mirror assembly
• Wiring harness issues
• Short circuit in the wiring
• Faulty body control module (BCM)
• Incorrectly installed or damaged connectors
• Malfunctioning switch or control module
• Grounding issues
• Battery or charging system problems

Common Troubleshooting Steps

The OBD-II code B1633 indicates a problem with the left mirror driver circuit, specifically a short to battery. Here are some common troubleshooting steps to diagnose and resolve this issue:

• Visual Inspection:
• Check the wiring and connectors associated with the left mirror. Look for any signs of damage, fraying, or corrosion.
• Inspect the mirror assembly for any physical damage that could affect the wiring.
• Check for Short Circuits:
• Use a multimeter to check for continuity in the mirror driver circuit. Disconnect the mirror connector and test the wires for continuity to ground or battery voltage.
• If you find continuity where there shouldn’t be (e.g., between the power wire and ground), you likely have a short circuit.
• Inspect the Mirror Motor:
• If the mirror motor is stuck or damaged, it could cause a short. Test the motor by applying power directly to it (if safe to do so) to see if it operates correctly.
• Check the Fuses:
• Inspect the fuses related to the mirror circuit. A blown fuse may indicate an overload or short circuit in the system.
• Scan for Additional Codes:
• Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues.
• Test the Control Module:
• If the wiring and mirror motor are in good condition, the issue may lie with the control module that manages the mirror functions. Check for proper operation and any fault codes related to the module.
• Repair or Replace Damaged Components:
• If you identify any damaged wiring, connectors, or components, repair or replace them as necessary.
• Clear Codes and Test Drive:
• After making repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional:
• If you are unable to diagnose or fix the issue, consider consulting a professional mechanic or automotive technician for further assistance. By following these steps, you should be able to identify and resolve the issue related to the B1633 code.