Code Definition

B1433 — Wiper Brake/Run Relay Circuit Short To Ground

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

About B1433

B1433 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 B1433 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.

B1433 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 monitors voltage on the wiper brake/run relay control or output circuit and sets DTC B1433 when it detects an unintended short to ground on this circuit. The wiper brake/run relay supplies the high current feed and brake function to the wiper motor when commanded by the BCM. With a short to ground on the relay control side, the relay coil cannot energise correctly and the BCM sees a continuously low signal that does not respond to commands. Symptoms typically include wipers that will not run, wipers that operate intermittently, or wipers that fail to return to park, and...

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