Code Definition

B1729 — Seat Driver Rear Down Switch Circuit Failure

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

About B1729

B1729 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 B1729 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.

B1729 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 memory seat module monitors the driver seat rear down switch circuit, which is part of the power seat height adjustment system on the driver's seat. DTC B1729 is set when the BCM detects an abnormal condition on the rear down switch input, such as the signal being held at an invalid voltage level or the switch failing to respond as expected during operation. The seat rear down switch is a momentary contact device that signals the module to drive the rear height motor downward when pressed. When this code is set, the rear of the driver's seat may fail to lower, ...

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