How to Diagnose and Solve B1485 Brake Pedal Input Circuit Battery Short Issues

Introduction

As a car owner, you may have experienced the frustration of a warning light appearing on your dashboard. One of the most common warning lights is the brake warning light, which can indicate a variety of issues. One of these issues is the B1485 brake pedal input circuit battery short. In this article, we will discuss how to diagnose and solve this issue.

What is the B1485 Brake Pedal Input Circuit Battery Short?

The B1485 brake pedal input circuit battery short is a diagnostic trouble code that indicates a problem with the brake pedal input circuit. This circuit is responsible for sending a signal to the brake system when the brake pedal is pressed. When this circuit is shorted to the battery, it can cause the brake warning light to appear on the dashboard.

Diagnosing the Issue

To diagnose the B1485 brake pedal input circuit battery short, you will need a diagnostic scanner. Connect the scanner to the OBD-II port under the dashboard and read the trouble codes. If the scanner displays the B1485 code, then you have identified the issue.

Checking the Brake Pedal Switch

The first step in diagnosing the issue is to check the brake pedal switch. This switch is located under the dashboard, near the brake pedal. Use a multimeter to check the continuity of the switch. If the switch is faulty, it will need to be replaced.

Checking the Wiring

If the brake pedal switch is functioning correctly, the next step is to check the wiring. Inspect the wiring for any signs of damage or wear. If you find any damaged wiring, it will need to be repaired or replaced.

Checking the Brake Light Relay

If the wiring is in good condition, the next step is to check the brake light relay. The relay is located in the fuse box under the hood. Use a multimeter to check the continuity of the relay. If the relay is faulty, it will need to be replaced.

Solving the Issue

Once you have identified the issue, it is time to solve it. If the brake pedal switch is faulty, replace it with a new one. If the wiring is damaged, repair or replace it. If the brake light relay is faulty, replace it with a new one.

Conclusion

The B1485 brake pedal input circuit battery short can be a frustrating issue for car owners. However, with the right tools and knowledge, it can be diagnosed and solved quickly. By following the steps outlined in this article, you can get your car back on the road in no time.

FAQs

1. Can I drive my car with the B1485 code?

It is not recommended to drive your car with the B1485 code. This code indicates a problem with the brake pedal input circuit, which can affect the performance of your brakes.

2. How much does it cost to fix the B1485 code?

The cost to fix the B1485 code will depend on the extent of the damage. If the issue is with the brake pedal switch, it can cost around $50 to $100 to replace. If the issue is with the wiring or relay, it can cost around $100 to $200 to repair or replace.

3. How can I prevent the B1485 code from appearing?

To prevent the B1485 code from appearing, it is important to maintain your car’s brake system. Regularly check the brake fluid level and replace it as needed. Also, have your brakes inspected by a professional mechanic at least once a year.