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Engine-Codes – Generic – B1304

B1304 Code - Accessory Delay Relay Coil Circuit Short To Battery

Quick Answer

The B1304 diagnostic trouble code (DTC) refers to an issue with the Accessory Delay Relay Coil Circuit Short To Battery. Common causes include Damaged wiring in the Accessory Delay Relay Coil Circuit, A faulty Accessory Delay Relay, Short circuit in the electrical system. 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 indicates Accessory Delay Relay Coil Circuit Short To Battery.
Common causes
Common causes include Damaged wiring in the Accessory Delay Relay Coil Circuit, A faulty Accessory Delay Relay, Short circuit in the electrical system.
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 07, 2024
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Code B1304 Description

The B1304 diagnostic trouble code (DTC) refers to an issue with the Accessory Delay Relay Coil Circuit Short To Battery. In simpler terms, this code indicates that there is a short circuit between the Accessory Delay Relay coil and the battery. The Accessory Delay Relay is responsible for controlling the power to certain accessories in the vehicle, such as the radio or power windows, even after the ignition has been turned off. When there is a short circuit in this circuit, it can lead to various electrical malfunctions and impact the vehicle's performance.

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

Common Causes of B1304

  1. Damaged wiring in the Accessory Delay Relay Coil Circuit.
  2. A faulty Accessory Delay Relay.
  3. Short circuit in the electrical system.
  4. Malfunctioning battery.

Symptoms of B1304

  1. Accessories such as the radio or power windows not working properly.
  2. Rapid draining of the battery.
  3. Electrical malfunctions or irregular behavior in the vehicle.
  4. Starting problems or a dead battery.

How to Fix B1304

  1. Begin by conducting a thorough inspection of the wiring in the Accessory Delay Relay Coil Circuit to identify any damage or shorts.
  2. Test the Accessory Delay Relay to determine if it is functioning correctly. Replace if necessary.
  3. Check for any other short circuits in the electrical system and repair as needed.
  4. Test the battery to ensure it is in good condition and replace if necessary.
  5. Clear the DTC and test the vehicle to ensure the issue has been resolved.

Cost to Fix B1304

The typical repair costs for addressing the Accessory Delay Relay Coil Circuit Short To Battery issue can vary depending on the specific cause of the problem and the cost of parts and labor. As a rough estimate, this repair could range from $100 to $300. However, it is important to note that actual costs can vary based on factors such as location, vehicle make and model, and the rates of the auto repair shop. It is advisable to contact local shops for more accurate pricing information.

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Code B1304 Information for Specific Makes

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 Code

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

The common symptoms of OBDII code B1304, Accessory Delay Relay Coil Circuit Short To Battery, may include issues with delayed accessory operation, such as lights or power windows not functioning properly.

2. What can cause the Accessory Delay Relay Coil Circuit to short to the battery?

The Accessory Delay Relay Coil Circuit may short to the battery due to damaged wiring, a faulty relay, or a short circuit in the electrical system.

3. How can I diagnose the cause of OBDII code B1304?

To diagnose the cause of OBDII code B1304, you can perform a visual inspection of the wiring, test the relay for proper functioning, and check for any signs of a short circuit in the circuit.

4. Can I still drive my vehicle with OBDII code B1304 present?

It is not recommended to drive your vehicle with OBDII code B1304 present, as it can lead to further electrical issues and potentially cause damage to other components in the system.

5. How can I repair OBDII code B1304?

To repair OBDII code B1304, you may need to replace the damaged wiring, faulty relay, or repair any short circuits in the circuit. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Is OBDII code B1304 a common issue in vehicles?

OBDII code B1304, Accessory Delay Relay Coil Circuit Short To Battery, is not as common as some other OBDII codes, but it can occur in vehicles with electrical system issues.

7. Can a DIY enthusiast fix OBDII code B1304?

Depending on your skill level and experience with automotive repairs, a DIY enthusiast may be able to fix OBDII code B1304 by following repair guides or tutorials. However, it is recommended to seek professional help if unsure.

8. Will resetting the OBDII code B1304 turn off the check engine light?

Resetting the OBDII code B1304 may turn off the check engine light temporarily, but if the underlying issue is not fixed, the code and light may reappear.

9. Are there any safety concerns associated with OBDII code B1304?

While OBDII code B1304 may not directly pose a safety risk, it can affect the proper functioning of electrical components in your vehicle, which can impact overall safety and performance.

10. How much does it cost to repair OBDII code B1304?

The cost to repair OBDII code B1304 can vary depending on the extent of the damage, parts needed for replacement, and labor costs. It is recommended to obtain quotes from different mechanics or repair shops for an accurate estimate.

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