Code Definition

B1755 — Hazard Flash Output Circuit Short Battery

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

About B1755

B1755 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 B1755 is stored, the module has detected a short-circuit (voltage pulled to ground or to supply) 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.

B1755 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) drives the hazard flasher output, which energises the front and rear turn lamps simultaneously when the hazard switch is pressed. DTC B1755 is set when the BCM detects an unexpected short to battery voltage on the hazard output drive line, meaning a constant high voltage is present on the output even when the BCM is commanding it off. The BCM uses a smart driver with current sensing, and a sustained high voltage that the module did not command typically indicates a chafed wire shorted to a hot feed, a stuck relay, or a misrouted aftermarket connection. When this c...

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