Code Definition

B1737 — Mirror Driver Horizontal Switch Circuit Failure

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

About B1737

B1737 is a manufacturer-specific body diagnostic trouble code recorded for Ford vehicles. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1737 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.

B1737 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 Driver Door Module (DDM) or Body Control Module (BCM) monitors the driver side exterior mirror horizontal switch circuit, which is the input that the driver uses to move the driver mirror glass left or right. DTC B1737 is set when the module detects an electrical fault in this switch circuit, such as an out of range voltage, an unexpected resistance, or an input that is stuck in one state. The mirror selector switch sends a discrete signal or a defined resistance value back to the module, and the module then commands the mirror motor to move horizontally. When this code is active, the driv...

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