AutoCodes – Dodge – B1478 Dodge

B1478 Dodge Code - Channel 5 Audio Speaker Output Circuit Shorted Together

Quick Answer

The standard equipment speaker system includes four full-range speakers. Common causes include Faulty Audio Amplifier, Audio Amplifier harness is open or shorted, Audio Amplifier 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: B1478 Dodge indicates Channel 5 Audio Speaker Output Circuit Shorted Together.
Common causes: Common causes include Faulty Audio Amplifier, Audio Amplifier harness is open or shorted, Audio Amplifier 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 1,068

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 Apr 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1478 Dodge Description

The standard equipment speaker system includes four full-range speakers. The two front speakers are mounted behind a removable bezel located on each outboard end of the lower instrument panel. With the premium speaker system, the standard front speakers are replace with an enclosure assembly that includes a 4 inch speaker and a 1 inch tweeter. The four rear speakers are mounted behind a grille located on each outboard end of the sport bar, above the rear seating area of the vehicle. This Diagnostic Trouble Code (DTC) sets if a Direct Current (DC) offset occurs on the output channel, the amplifier shall set a DTC after a maturity rate of four to six seconds.

OBDII Code B1478 Dodge - Channel 5 Audio Speaker Output Circuit Shorted Together - AutoCodes.com — B1478 Dodge Code - Channel 5 Audio Speaker Output Circuit Shorted Together

What does this mean?

What are the Possible Causes of the DTC B1478 Dodge?

Faulty Audio Amplifier
Audio Amplifier harness is open or shorted
Audio Amplifier circuit poor electrical connection

How to Fix the DTC B1478 Dodge?

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 B1478 Dodge 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 B1478 Dodge Code

1. What does the OBDII code B1478 mean for a Dodge vehicle?

The code B1478 indicates that the Channel 5 audio speaker output circuit is shorted together, meaning there is an electrical issue in the audio system.

2. What are the common symptoms of code B1478 in a Dodge?

Symptoms may include distorted or no sound from the audio system, particularly from the speaker associated with Channel 5, or intermittent audio issues.

3. What causes the B1478 code to appear on a Dodge vehicle?

The code is typically caused by damaged or frayed speaker wires, a malfunctioning speaker, a short circuit in the wiring, or a fault in the audio amplifier or head unit.

4. Can I still drive my Dodge with the B1478 code?

Yes, the code does not affect the drivability of the vehicle, but it may cause issues with the audio system and should be addressed to restore proper functionality.

5. How do I diagnose the B1478 code in my Dodge?

Start by inspecting the speaker wiring for damage or shorts. Check the speaker itself, and test the audio amplifier and head unit for faults using a multimeter.

6. What tools are needed to fix the B1478 code?

Youâ€™ll likely need a multimeter, wiring diagram, and basic tools to inspect and repair the speaker wiring, as well as potentially a replacement speaker or amplifier.

7. Can I fix the B1478 code myself?

If you are comfortable working with automotive wiring and audio systems, you may be able to fix it by repairing damaged wires or replacing a faulty speaker. Otherwise, seek professional help.

8. How much does it cost to repair the B1478 code on a Dodge?

Repair costs vary depending on the issue. Fixing damaged wires may cost little to nothing if you do it yourself, while replacing a speaker or amplifier can cost $50 to $500 or more, including labor.

9. Will resetting the code B1478 fix the problem?

Resetting the code without addressing the underlying issue will not fix the problem and the code is likely to return.

10. What should I do if replacing the speaker doesnâ€™t fix the B1478 code?

If replacing the speaker doesnâ€™t resolve the issue, inspect the wiring and the audio amplifier for faults, or consult a professional technician for further diagnosis.