B1247 – Panel Dim Switch Circuit Open

The ODBII code B1247 indicates that there is an open circuit in the panel dimmer switch, which controls the brightness of the dashboard lights.

The severity of ODBII code B1247 is moderate.

Common Causes For: B1246 Dim Panel Potentiometer Switch Circuit Failure

• Faulty panel dimmer switch
• Open circuit in wiring
• Poor connections or corroded terminals
• Faulty body control module (BCM)
• Blown fuse related to the dimmer circuit

Common misdiagnosis for B1247 Panel Dim Switch Circuit Open

• Faulty headlight switch
• Defective dimmer switch
• Wiring issues or shorts in the circuit
• Malfunctioning body control module (BCM)
• Bad ground connections
• Faulty instrument cluster
• Incorrectly installed or damaged dashboard components

Common Troubleshooting Steps

When dealing with an OBD-II code B1247, which indicates a “Panel Dim Switch Circuit Open,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:

• Check the Vehicle’s Manual: Refer to the vehicle’s service manual for specific information regarding the panel dim switch circuit and wiring diagrams.
• Visual Inspection: Inspect the panel dim switch and its wiring for any visible damage, such as frayed wires, corrosion, or loose connections.
• Check the connectors for any signs of wear or poor contact.
• Test the Panel Dim Switch: Use a multimeter to test the resistance of the panel dim switch. It should show continuity when the switch is activated.
• If the switch is faulty, replace it.
• Check for Short Circuits: Inspect the wiring harness for any shorts to ground or other circuits that could cause an open circuit condition.
• Use a multimeter to check for continuity in the wiring between the switch and the control module.
• Inspect the Control Module: If the wiring and switch are in good condition, the issue may lie within the vehicle’s control module (BCM or IPC).
• Check for any software updates or known issues related to the control module.
• Scan for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes that may provide more context to the issue.
• Address any other codes that may be present.
• Clear the Codes: After performing the above checks and repairs, clear the trouble codes using an OBD-II scanner.
• Take the vehicle for a test drive to see if the code returns.
• Consult a Professional: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with your specific vehicle make and model.Additional Tips: – Always ensure the vehicle is turned off and the battery is disconnected when working on electrical components to avoid shorts or shocks. – Document any changes or repairs made during the troubleshooting process for future reference. By following these steps, you should be able to identify and resolve the issue related to the B1247 code.