Code Definition

B1247 — Panel Dim Switch Circuit Open

System: Body  |  Type: Manufacturer-Specific  |  Make: Generic

About B1247

B1247 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1247 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

Scanning & clearing: Body (B) codes are often stored in the body control module, airbag module, or climate module. A basic OBD-II tool usually will not read body codes — an enhanced or OEM-level scan tool is typically required.

B1247 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The panel dim switch allows the driver to adjust the illumination intensity of the instrument cluster and interior dash lighting. The switch is typically a potentiometer that provides a variable resistance or variable voltage signal to the body control module (BCM) or instrument cluster, which uses this input to modulate the PWM duty cycle feeding the panel lighting circuits. DTC B1247 sets when the module detects an open circuit on the dim switch input, meaning no valid return signal is being read from the potentiometer wiper across its travel. When this fault is active, panel illumination co...

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