Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
To diagnose the B1897 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
The horn relay control and switched voltage is supplied by the Bussed Electrical Center (BEC). The Smart Junction Box (SJB) receives the horn signal from the horn switch (part of the steering wheel). When the horn switch is pressed, the ground is supplied from the clockspring to the vehicle harness. The SJB then activates the horn relay. Voltage is then sent to the horn, enabling the horns to sound. The ground is provided to the horns.
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