AutoCodes – Ford – B1304 Ford

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

Quick Answer

The accessory delay relay receives voltage at all times from the Smart Junction Box (SJB). Common causes include Faulty Accessory Delay Relay, Accessory Delay Relay harness is open or shorted, Accessory Delay Relay circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B1304 Ford indicates Accessory Delay Relay Coil Circuit Short To Battery.
Common causes: Common causes include Faulty Accessory Delay Relay, Accessory Delay Relay harness is open or shorted, Accessory Delay Relay circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 8,580

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1304 Ford Description

The accessory delay relay receives voltage at all times from the Smart Junction Box (SJB). The SJB controls the coil side ground of the accessory delay relay and activates the accessory delay relay when the ignition switch is in the ON position. The accessory delay relay remains active for an additional 10 minutes when the ignition switch is in the OFF position or until the driver door is opened. The accessory delay relay provides voltage to the door lock switches, power windows and roof opening panel (if equipped).

OBDII Code B1304 Ford - Accessory Delay Relay Coil Circuit Short To Battery - AutoCodes.com — B1304 Ford Code - Accessory Delay Relay Coil Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC B1304 Ford?

Faulty Accessory Delay Relay
Accessory Delay Relay harness is open or shorted
Accessory Delay Relay circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1304 Ford?

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 B1304 Ford 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 B1304 Ford Code

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

- Common symptoms include accessory delay features not working, such as delayed interior lighting or radio staying on after the vehicle is turned off.

2. What causes the OBDII code B1304 Ford to appear?

- This code is typically triggered by a short circuit between the accessory delay relay coil and the vehicle's battery.

3. How can I diagnose the Accessory Delay Relay Coil Circuit Short To Battery issue?

- Use a multimeter to check for continuity between the relay coil and the battery positive terminal. Inspect wiring for any signs of damage or corrosion.

4. Can a faulty accessory delay relay cause the B1304 code?

- Yes, a malfunctioning accessory delay relay can cause the coil circuit to short to the battery, triggering the B1304 code.

5. Are there any safety concerns associated with this OBDII code?

- While the B1304 code itself does not pose immediate safety risks, it can affect the proper functioning of accessory delay features in the vehicle.

6. How can I repair the Accessory Delay Relay Coil Circuit Short To Battery issue?

- Repair typically involves locating and repairing the short circuit between the relay coil and the battery, or replacing damaged wiring or the faulty relay.

7. Is it safe to continue driving with the B1304 Ford code present?

- It is recommended to address the issue promptly to ensure proper operation of accessory delay functions and prevent potential electrical system problems.

8. Can the B1304 code be intermittent?

- Yes, the B1304 code may appear intermittently if the short circuit between the relay coil and the battery is intermittent or if the faulty relay connection is sporadic.

9. Will resetting the OBDII code clear the issue temporarily?

- Resetting the code may temporarily clear the warning, but if the underlying issue causing the B1304 code is not addressed, it is likely to reappear.

10. Are there any recalls or technical service bulletins related to the B1304 Ford code?

- Check with Ford or authorized dealerships for any related recalls or technical service bulletins that may provide specific guidance or solutions for this code.