Code Definition

B1471 — Lamp Headlamp Input Circuit Open

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

About B1471

B1471 is a manufacturer-specific body diagnostic trouble code. It belongs to the B-prefix family of codes, which covers body, interior, airbag, or comfort-electronics faults.

When B1471 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.

B1471 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 headlamp switch input to determine when the driver has selected park lamps, low beam, high beam, or auto headlamps. DTC B1471 sets specifically when the BCM detects an open circuit on this headlamp input line, meaning the input no longer rises to or falls to a valid voltage when the headlamp switch is moved through its positions. On vehicles fitted with a discrete lighting control module the input may pass through that module before reaching the BCM, in which case the open can be in the wiring between switch, lighting module, and BCM. With the circuit...

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