Code Definition

B1326 — Door Ajar Lamp Circuit Short To Ground

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

About B1326

B1326 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 B1326 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.

B1326 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 door ajar warning lamp drive output and sets DTC B1326 when it detects the drive circuit is shorted to ground. Because the BCM controls the lamp by switching it between battery voltage and ground, an unintended ground connection on the drive wire removes the BCM's authority over the circuit. The practical result depends on the circuit design. The lamp may be stuck on whenever the cluster is powered, may fail to extinguish on command, or may fail to come on at all. The most common physical cause is chafed insulation that allows the drive wire to contac...

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