AutoCodes – GMC – B1287 GMC

B1287 GMC Code - Amplifier Control Signal Circuit

Quick Answer

The radio provides a remote amplifier mute output circuit to control overall muting of the remote amplifier. Common causes include Faulty Amplifier, Amplifier harness is open or shorted, Amplifier circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1287 GMC indicates Amplifier Control Signal Circuit.
Common causes: Common causes include Faulty Amplifier, Amplifier harness is open or shorted, Amplifier circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 4,485

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1287 GMC Description

The radio provides a remote amplifier mute output circuit to control overall muting of the remote amplifier. The amplifier receives Pulse Width Modulated (PWM) signals on the control circuit at varying duty cycle percentages for controlling muted and unmuted functions of the amplifier. Circuitry internal to the radio monitors the remote amplifier mute circuit for faults and sets the appropriate Diagnostic Trouble Code (DTC) when faults are detected.

OBDII Code B1287 GMC - Amplifier Control Signal Circuit - AutoCodes.com — B1287 GMC Code - Amplifier Control Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B1287 GMC?

Faulty Amplifier
Amplifier harness is open or shorted
Amplifier circuit poor electrical connection
Faulty Radio Unit

How to Fix the DTC B1287 GMC?

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 does this mean?

Code Tech Notes

DTC B1287 01 Amplifier Control Signal Circuit Short to Battery
DTC B1287 02 Amplifier Control Signal Circuit Short to Ground
DTC B1287 04 Amplifier Control Signal Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1287 GMC 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.

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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 B1287 GMC Code

1. What are the common symptoms of OBDII code B1287 GMC (Amplifier Control Signal Circuit)?

- Common symptoms include no sound from the speakers, distorted audio, or complete audio system failure.

2. What are the possible causes of OBDII code B1287 GMC?

- The code may be triggered by a faulty amplifier, damaged wiring in the control signal circuit, or a defective audio unit.

3. How can I diagnose the Amplifier Control Signal Circuit issue related to code B1287 GMC?

- You can start by checking the wiring connections to the amplifier, inspecting the amplifier for any signs of damage, and testing the audio unit for proper functionality.

4. What are some repair tips for resolving OBDII code B1287 GMC?

- Repair tips include repairing or replacing damaged wiring, repairing or replacing the amplifier, and ensuring proper connections between components.

5. Can a DIY enthusiast fix OBDII code B1287 GMC at home?

- Depending on your skill level and access to tools, you may be able to address the issue at home by following repair guides or seeking assistance from automotive forums.

6. Is it safe to continue driving with OBDII code B1287 GMC present?

- While the vehicle may still be operational, it is recommended to address the issue promptly to prevent further damage to the audio system components.

7. How much does it typically cost to repair OBDII code B1287 GMC?

- The cost of repair can vary depending on the extent of the damage, the need for replacement parts, and whether you choose to perform the repair yourself or seek professional help.

8. Are there any preventive measures to avoid OBDII code B1287 GMC in the future?

- Regularly inspecting and maintaining the audio system components, avoiding water damage, and ensuring proper installation of aftermarket audio equipment can help prevent this issue.

9. Can OBDII code B1287 GMC be a recurring problem even after repair?

- If the root cause of the issue is not properly addressed during the repair, there is a possibility of the code reoccurring. Thorough diagnosis and repair are essential to prevent recurrence.

10. How long does it take to repair OBDII code B1287 GMC?

- The repair time can vary depending on the complexity of the issue, availability of parts, and whether you are doing the repair yourself or seeking professional assistance.