The B1304 Ford Code is an issue related to the Accessory Delay Relay Coil Circuit. When this code is set, it indicates a short to the battery which can affect the door lock switches, power windows, and roof opening panel (if equipped).
It is important to diagnose and repair this issue as soon as possible, as the cost of repair varies depending on the make and model of the vehicle.
This article will discuss the possible symptoms, causes, and fixes for this code.
Key Takeaways
- The B1304 Ford code is related to the accessory delay relay in the vehicle.
- Possible causes of this code include a faulty accessory delay relay, open or shorted wiring harness, poor electrical connection, or a faulty Smart Junction Box (SJB).
- To fix the B1304 code, you should check the possible causes, visually inspect the wiring and connectors, and look for any damaged components or connector pins.
- The cost to diagnose the B1304 Ford code can vary depending on factors such as location, make and model of the vehicle, and engine type. Most auto repair shops charge between $75 and $150 per hour for labor. Additional costs may apply for parts and repairs.
Symptoms of the B1304 Ford Code
Possible symptoms of the B1304 Ford Code include an illuminated Engine Light (or Service Engine Soon Warning Light). This code may be caused by a faulty Accessory Delay Relay, Accessory Delay Relay harness issue, or a poor electrical connection.
Common vehicles affected by this code are Ford Focus, Escape, and Mustang models, and troubleshooting steps may involve checking for damaged components, broken, bent or corroded connector pins, and referencing any Factory Service Bulletins issued by Ford.
Diagnosis may require an auto repair shop to charge an hourly rate of between $75 and $150. Fixes may include repairing the Accessory Delay Relay or harness, and making sure the electrical connection is secure.
Causes of the B1304 Ford Code
The B1304 Ford Code can be caused by a faulty Accessory Delay Relay, an open or shorted Accessory Delay Relay harness, a poor electrical connection in the Accessory Delay Relay circuit, or a faulty Smart Junction Box (SJB).
To diagnose this issue, a wiring inspection should be conducted to look for any damaged components, broken, bent, pushed out, or corroded connector pins. Additionally, Factory Service Bulletins issued by Ford should be checked.
If the B1304 code is confirmed, the labor cost to diagnose this issue is approximately 1.0 hour and will vary depending on the make and model of the vehicle, as well as the engine type. Most auto repair shops charge between $75 and $150 per hour.
Diagnosing the B1304 Ford Code
To properly diagnose the B1304 Ford Code, a wiring inspection of the related components should be performed in order to identify any potential damaged parts, corrosion, or poor electrical connections. Testing procedures should start with a visual inspection of the harness and connectors, looking for any obvious signs of damage.
Common vehicles affected by this code include the Ford Focus, Fusion, Edge, and Escape. Potential damage caused by this code can include short-circuiting of the accessory delay relay coil circuit to the battery. Related diagnostic trouble codes that may be present include P0713, P0232, and P0234.
Troubleshooting tips include checking for any Factory Service Bulletins issued by Ford for the B1304 code.
Fixes for B1304 Ford Code
Troubleshooting the B1304 Ford Code may require inspecting the related wiring harness and components to determine if any damage or poor electrical connections are present. Possible fixes for this code include:
- Repairing or replacing any damaged components
- Performing a visual inspection of the wiring and connectors
- Replacing the Accessory Delay Relay if necessary
Common solutions also include:
- Checking for broken, bent, pushed out, or corroded connector pins
- Checking any Factory Service Bulletins issued by Ford for the B1304 code
In order to avoid this issue in the future, preventative measures should be taken to ensure the wiring harness and connectors remain in good condition.
Taking these troubleshooting steps and repair options into consideration can help to resolve the B1304 Ford Code quickly and easily.
Video Help for Testing Relays
This is a video by the YouTube channel Make It Easy Mechanic and he does a short 8 minute video explaining relay testing. He makes the video super helpful and straight forward. This will help you on many automotive applications, but also of course the B1304 Ford code issue as well. Click the red play button below to watch it.
Frequently Asked Questions
How Can I Tell if My Accessory Delay Relay Is Faulty?
To troubleshoot a faulty accessory delay relay, check for any related symptoms, test the power connections, replace the fuse, and check the voltage. If any of these steps fail to resolve the issue, then the delay relay may be faulty and require replacement.
Is It Possible to Repair the Accessory Delay Relay Without Replacing It?
Yes, it is possible to repair the accessory delay relay without replacing it. Preventive maintenance such as fuse replacement and wiring troubleshooting can help identify issues. If further diagnosis is necessary, relay voltage testing can be conducted to assess the condition of the relay. Professional assistance may be required for proper repair.
What Should I Do if I Have Already Replaced the Accessory Delay Relay and the B1304 Ford Code Is Still Present?
If the B1304 code is still present after replacing the accessory delay relay, it is important to diagnose the symptoms, check the voltage, and troubleshoot the wiring. Testing the voltage regulators and checking the wiring for any faults can help determine the cause of the code and provide the necessary steps to repair the issue.
Can the B1304 Ford Code Cause Any Other Issues in My Vehicle?
Yes, the B1304 Ford Code can cause additional issues in your vehicle such as alternator problems, fuse testing, electrical diagnosis, battery checks, and wiring inspection. It is important to diagnose the issue thoroughly to avoid further damage.
Is There a Way to Prevent the B1304 Ford Code From Occurring in the Future?
To prevent the B1304 Ford Code from occurring in the future, it is important to regularly check wiring connections and test components for any signs of corrosion or damage. Additionally, it is important to diagnose any potential issues before they become major problems, and to bypass any wiring that may be causing issues.
Final Thoughts
The B1304 Ford Code is a diagnostic trouble code that is set when the accessory delay relay coil circuit is shorted to the battery.
To determine the cause of this code, a thorough visual inspection of the related wiring harness and connectors must be conducted, as well as checking for any damaged components.
A professional mechanic should be consulted to diagnose and repair the issue, as the cost of the repair will depend on the make and model of the vehicle and engine type.
Proper diagnosis and repair of the B1304 Ford Code is essential to ensure safe operation of the vehicle.
