Code Definition

B1507 — Flash To Pass Switch Circuit Failure

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

About B1507

B1507 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 B1507 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

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.

B1507 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 Body Control Module (BCM) or headlamp control module monitors the flash to pass switch input from the multifunction stalk on the steering column. The flash to pass function activates the high beam headlamps momentarily when the driver pulls the turn signal stalk toward themselves, providing a way to signal other vehicles without engaging the latched high beam mode. DTC B1507 sets when the module detects an electrical fault on the flash to pass switch circuit, such as a switch input that remains active continuously, an open circuit that prevents the input from being read, or a circuit volta...

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