Horn Switch Circuit Failure


Table of contents

B1897 MAZDA Possible Causes

  • Faulty Horn Relay
  • Faulty Horn Switch
  • Horn Switch harness is open or shorted
  • Horn Switch circuit poor electrical connection
  • Faulty Clockspring
  • Faulty Body Control Module (BCM)

How do I fix code B1897 MAZDA?

  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.

Cost of diagnosing the B1897 MAZDA code

  The cost of diagnosing the B1897 MAZDA 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.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B1897 MAZDA Description

  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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