AutoCodes – Generic – B2753

B2753 Code - Horn Relay Control Circuit Shorted to Voltage

Quick Answer

The vehicle horns are activated whenever the ground is applied to the horn relay coil through the horn relay control circuit. Common causes include Faulty Horn Relay, Horn Relay harness is open or shorted, Horn Relay circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2753 indicates Horn Relay Control Circuit Shorted to Voltage.
Common causes: Common causes include Faulty Horn Relay, Horn Relay harness is open or shorted, Horn Relay circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,040

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2753 Description

The vehicle horns are activated whenever the ground is applied to the horn relay coil through the horn relay control circuit. The ground may be applied by either of the following: Body Control Module (BCM) and Horn switch. The Diagnostic Trouble Code (DTC) sets when the body control system voltage must be between 9.0 and 16.0 volts.

OBDII Code B2753 - Horn Relay Control Circuit Shorted to Voltage - AutoCodes.com — B2753 Code - Horn Relay Control Circuit Shorted to Voltage

What does this mean?

What are the Possible Causes of the DTC B2753?

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

How to Fix the DTC B2753?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2753 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B2753 code?

Need more information on how to fix the B2753 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2753 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2753 Buick — Horn Relay Control Circuit Shorted to Voltage
B2753 Cadillac — Horn Relay Control Circuit Shorted to Voltage
B2753 Chevrolet — Horn Relay Control Circuit Shorted to Voltage
B2753 GMC — Horn Relay Control Circuit Shorted to Voltage

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2753 Code

1. What are the common symptoms of OBDII code B2753 (Horn Relay Control Circuit Shorted to Voltage)?

- Common symptoms include a non-functioning horn, the horn going off unexpectedly, or a blown fuse related to the horn circuit.

2. What are some possible causes of OBDII code B2753?

- Possible causes include a short circuit in the horn relay control circuit, a faulty horn switch, a damaged wiring harness, or a malfunctioning horn relay.

3. How can I diagnose OBDII code B2753?

- To diagnose this code, you can use a scan tool to read the fault codes and inspect the horn relay, horn switch, wiring, and fuses for any visible signs of damage or shorts.

4. Can I drive my vehicle with OBDII code B2753?

- It is generally safe to drive your vehicle with this code, but you should address the issue promptly to ensure the horn functions correctly in case of emergencies.

5. How do I repair OBDII code B2753?

- Repair involves identifying and fixing the underlying cause of the short circuit in the horn relay control circuit, which may require replacing damaged components or repairing the wiring.

6. Is it easy to fix OBDII code B2753 on my own?

- Depending on your automotive repair skills and knowledge, you may be able to fix this issue on your own by following diagnostic procedures and repair instructions provided in the service manual.

7. Can a faulty horn relay cause OBDII code B2753?

- Yes, a faulty horn relay can cause this code if it is shorted to voltage, preventing the horn from functioning properly.

8. Will resetting the OBDII system clear code B2753?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the short circuit is not addressed, the code is likely to return.

9. How much does it cost to repair OBDII code B2753?

- The cost of repairing this code can vary depending on the specific cause of the issue, but it may involve the cost of replacement parts and labor for diagnosis and repair.

10. Can a damaged wiring harness cause OBDII code B2753?

- Yes, a damaged wiring harness in the horn relay control circuit can cause a short to voltage, triggering OBDII code B2753.