Code Definition

B2849 (60) — Horn Output Relay Open Circuit

System: Body  |  Type: Generic (OBD-II Standard)  |  Make: Ford

About B2849

B2849 is a generic (obd-ii standard) 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 B2849 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.

Because B2849 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Body Control Module (BCM) commands the horn output relay and continuously monitors the control circuit to confirm electrical continuity between the BCM driver, the relay coil, and the relay load contacts that feed the horn assembly. The BCM checks for an expected current flow or voltage response on the output when the horn is commanded on. DTC B2849:60 is set when the BCM detects an open circuit on the horn relay control or output, meaning no current path is being completed when it expects one. When this code is logged the horn will be inoperative or operate only intermittently, and the al...

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