Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
The cost of diagnosing the B1897 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops 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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