B1637 – Mirror Driver Right Circuit Short To Battery

The ODBII code B1637 indicates a short circuit in the right mirror driver’s circuit, meaning that the circuit is receiving power directly from the battery instead of functioning normally.

The severity of ODBII code B1637 is moderate.

Common Causes For: B1636 Mirror Driver Right Circuit Open

• Shorted wiring or connectors
• Faulty mirror driver module
• Damaged mirror motor
• Corroded or loose electrical connections
• Malfunctioning switch or control module
• Grounding issues
• Water intrusion or moisture damage

Common misdiagnosis for B1637 Mirror Driver Right Circuit Short To Battery

• Faulty mirror switch
• Wiring harness issues
• Defective mirror motor
• Shorted wiring
• Body control module (BCM) failure
• Incorrectly installed aftermarket mirrors
• Grounding issues
• Faulty fuse or relay

Common Troubleshooting Steps

The OBD-II code B1637 indicates a problem with the right mirror driver’s 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 right 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 wiring harness. Disconnect the mirror connector and test the wires for continuity to ground. A short circuit will show continuity where there shouldn’t be any.
• Check for any pinched or exposed wires that could be causing a short to battery.
• Inspect the Mirror Motor:
• If the wiring appears intact, the issue may lie within the mirror motor itself. Test the motor for proper operation by applying direct power to it (if safe to do so) to see if it functions correctly.
• Check the Power and Ground:
• Verify that the mirror is receiving the correct voltage. Use a multimeter to check the voltage at the mirror connector while the vehicle is on.
• Ensure that the ground connection is solid and free of corrosion.
• 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.
• Inspect the Body Control Module (BCM):
• The BCM controls many electrical components, including mirrors. Check for any faults in the BCM that could be causing the issue.
• If necessary, reprogram or replace the BCM if it is determined to be faulty.
• Check Fuses:
• Inspect the fuses related to the mirror and the electrical system. A blown fuse may indicate an overload or short circuit.
• Repair or Replace Components:
• Based on your findings, repair any damaged wiring or connectors. If the mirror motor is faulty, consider replacing it.
• Clear Codes and Test Drive:
• After making repairs, clear the trouble codes using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult a Professional:
• If the issue persists after following these steps, it may be best to consult a professional mechanic or an automotive electrician for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the B1637 code.