Code Definition

B1745 — Mirror Passenger Horizontal Switch Circuit Failure

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

About B1745

B1745 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 B1745 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.

B1745 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 passenger side exterior mirror horizontal switch input circuit, which is the line that carries the switch state back to the controlling module when the user presses the mirror selector left or right with the passenger side selected. DTC B1745 is set when the module detects a general electrical fault on this input, such as out of range voltage, unexpected resistance, or a stuck input that does not match commanded operation. The mirror selector switch sends a discrete signal or defined resistance value to the module, which th...

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