Code Definition

B1875 — Turn Signal / Hazard Switch Signal Circuit Failure

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

About B1875

B1875 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 B1875 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.

B1875 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 Smart Junction Box (SJB) monitors the signal return circuit from the turn signal and hazard switch to determine which switch position the driver has selected. DTC B1875 is set when the SJB detects that the switch signal circuit is not behaving within expected parameters, which may indicate an open circuit, a short, an out of range voltage, or a signal that does not change state when the switch is operated. The switch typically uses a resistance ladder or discrete signal lines that the SJB interprets to command left turn, right turn, or hazard operation. When this code is present, the drive...

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