Engine-Codes.com
Engine-Codes – Mercury – B1304 Mercury

B1304 Mercury Code - Accessory Delay Relay Coil Circuit Short To Battery

Quick Answer

The B1304 diagnostic trouble code for Mercury vehicles indicates a problem with the Accessory Delay Relay Coil Circuit being shorted to the battery. Common causes include Short circuit in the wiring harness connected to the Accessory Delay Relay, Damaged or corroded wiring causing unintended contact with the battery, Faulty Accessory Delay Relay. 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
B1304 Mercury indicates Accessory Delay Relay Coil Circuit Short To Battery.
Common causes
Common causes include Short circuit in the wiring harness connected to the Accessory Delay Relay, Damaged or corroded wiring causing unintended contact with the battery, Faulty Accessory Delay Relay.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B1304 Mercury Description

The B1304 diagnostic trouble code for Mercury vehicles indicates a problem with the Accessory Delay Relay Coil Circuit being shorted to the battery. The Accessory Delay Relay is responsible for controlling the power to various accessories in the vehicle, such as the radio, power windows, and interior lights, allowing them to remain operational for a short period after the ignition is turned off. When this circuit is shorted to the battery, it can lead to a variety of issues that can affect the vehicle's performance and functionality.

OBDII Code B1304 Mercury - Accessory Delay Relay Coil Circuit Short To Battery
B1304 Mercury Code - Accessory Delay Relay Coil Circuit Short To Battery

Common Causes of B1304 Mercury

  1. Short circuit in the wiring harness connected to the Accessory Delay Relay.
  2. Damaged or corroded wiring causing unintended contact with the battery.
  3. Faulty Accessory Delay Relay.
  4. Electrical component failure in the circuit.

Symptoms of B1304 Mercury

  1. Accessories such as the radio, power windows, or interior lights not working properly or intermittently.
  2. Battery draining quickly, leading to starting issues.
  3. Fuse for the affected circuit repeatedly blowing.
  4. Dashboard warning light indicating an electrical fault.

How to Fix B1304 Mercury

  1. Begin by conducting a thorough visual inspection of the wiring harness connected to the Accessory Delay Relay to look for any signs of damage, corrosion, or exposed wires.
  2. Use a multimeter to test for continuity and voltage in the circuit to pinpoint the location of the short circuit.
  3. Repair or replace any damaged wiring or components in the circuit, ensuring proper insulation and secure connections.
  4. Test the repaired circuit to verify that the issue has been resolved and that the affected accessories are functioning correctly.
  5. Clear the diagnostic trouble code from the vehicle's computer using a scan tool to reset the system and ensure the code does not reappear.

Cost to Fix B1304 Mercury

The typical repair costs for addressing a B1304 code related to the Accessory Delay Relay Coil Circuit short to battery can vary depending on the extent of the damage and the specific components that need to be repaired or replaced. In general, the cost of parts for this repair can range from $50 to $200, while the labor costs can add an additional $100 to $300. Overall, the total repair cost for this issue may fall within the range of $150 to $500, including both parts and labor.

Need more information about the B1304 Mercury code?

Need more information on how to fix the B1304 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1304 Mercury code diagnosed by a professional: Find a repair shop in your area

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 B1304 Mercury Code

1. What are the common symptoms of OBDII code B1304 Mercury?

- Common symptoms include accessory delay features not functioning properly, such as delayed interior lighting or power windows.

2. What causes the OBDII code B1304 Mercury to trigger?

- This code is triggered when the Accessory Delay Relay Coil circuit experiences a short to the battery.

3. How can I diagnose the Accessory Delay Relay Coil circuit for a short to the battery?

- Use a multimeter to test for continuity and check for any obvious signs of damage or corrosion in the wiring.

4. What are some potential repair tips for fixing the Accessory Delay Relay Coil circuit short to battery issue?

- Repairing or replacing damaged wiring, connectors, or the Accessory Delay Relay itself can help resolve the issue.

5. Can the OBDII code B1304 Mercury affect other electrical systems in the vehicle?

- Yes, since the Accessory Delay Relay controls various electrical features, a short in this circuit can impact other systems relying on it.

6. Is it safe to continue driving with the B1304 code triggered in my Mercury?

- It is generally not recommended to drive with this code triggered, as it can lead to further electrical issues and potential safety hazards.

7. How do I reset the OBDII code B1304 in my Mercury after making repairs?

- After fixing the issue causing the code, you can reset it using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

8. Are there any preventive measures to avoid the Accessory Delay Relay Coil circuit short to battery issue?

- Regularly inspecting the wiring harness for signs of wear and ensuring proper installation of electrical components can help prevent this issue.

9. Can a DIY enthusiast repair the Accessory Delay Relay Coil circuit short to battery problem?

- Depending on your skill level and access to tools, a DIY enthusiast may be able to diagnose and repair this issue, but professional help is recommended for complex electrical repairs.

10. How can I find the exact location of the Accessory Delay Relay in my Mercury for inspection or replacement?

- Consult your vehicle's service manual or seek guidance from an automotive professional to locate the Accessory Delay Relay in your specific Mercury model.

Discuss the causes and fixes for B1304 Mercury OBDII Code

Submit a New Comment

Code B1304 Mercury comments

No comments found for this page.