Code Definition

B1344 — Heated Backlite Input Circuit Open

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

About B1344

B1344 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 B1344 is stored, the module has detected an open (broken or disconnected) electrical path 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.

B1344 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) monitors the heated backlite (rear defroster) request input circuit, which carries the driver activation signal from the dashboard switch to the BCM. DTC B1344 is set when the BCM detects an open circuit on this input, meaning the expected voltage state is not present when the switch is operated. The heated backlite system uses the BCM to receive the request and then commands a relay or internal driver that supplies high current to the conductive grid bonded to the rear glass. When this code is active the rear defroster will not activate when the switch is pressed...

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