Code Definition

B1720 — Seat Driver Forward Switch Circuit Short To Ground

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

About B1720

B1720 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 B1720 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.

B1720 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 Driver Seat Module (DSM) monitors the driver seat forward switch input circuit and sets code B1720 when the switch signal line is detected pulled to ground continuously when no switch input is expected. A short to ground typically results from chafed insulation allowing the switch wire to contact a metal seat frame component or chassis ground, a stuck switch holding the input low, or moisture creating a low resistance path between the signal and ground. The driver seat forward switch is a normally open momentary contact device on the seat side trim that signals...

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