AutoCodes – Mercury – B1303 Mercury

B1303 Mercury Code - Accessory Delay Relay Coil Circuit Open

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: B1303 Mercury indicates Accessory Delay Relay Coil Circuit Open.
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 888

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 B1303 Mercury 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 B1303 Mercury - Accessory Delay Relay Coil Circuit Open - AutoCodes.com — B1303 Mercury Code - Accessory Delay Relay Coil Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1303 Mercury?

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 B1303 Mercury?

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 B1303 Mercury 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 B1303 Mercury Code

1. What are the common symptoms of OBDII code B1303 in a Mercury related to the Accessory Delay Relay Coil Circuit Open?

- Common symptoms may include accessories not functioning properly, such as delayed or non-responsive power windows, radio, or interior lights.

2. What are some possible causes of the Accessory Delay Relay Coil Circuit Open code B1303 in a Mercury?

- Possible causes could include a faulty accessory delay relay, damaged wiring or connectors in the circuit, or a malfunctioning control module.

3. How can I diagnose the Accessory Delay Relay Coil Circuit Open code B1303 in my Mercury?

- Diagnosis typically involves using a scan tool to retrieve the specific trouble code, inspecting the wiring and connectors for damage, and testing the accessory delay relay for proper functionality.

4. Can I still drive my Mercury with the B1303 code for the Accessory Delay Relay Coil Circuit Open?

- It is generally safe to drive your vehicle with this code, but it is recommended to address the issue promptly to ensure proper operation of the affected accessories.

5. What are some repair tips for fixing the Accessory Delay Relay Coil Circuit Open code B1303 in a Mercury?

- Repair tips may include checking and replacing any damaged wiring or connectors, testing and replacing the accessory delay relay if necessary, and ensuring proper connection to the control module.

6. Is it possible to reset the B1303 code in a Mercury without fixing the underlying issue?

- While you can clear the code using a scan tool, it is important to address the root cause of the problem to prevent the code from reoccurring.

7. Are there any common mistakes to avoid when diagnosing the Accessory Delay Relay Coil Circuit Open code B1303 in a Mercury?

- Common mistakes include overlooking damaged wiring, improperly testing the accessory delay relay, and neglecting to check the control module for faults.

8. How much does it typically cost to repair the B1303 code related to the Accessory Delay Relay Coil Circuit Open in a Mercury?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve expenses for parts and labor, ranging from a few hundred to a few thousand dollars.

9. Can a DIY enthusiast fix the B1303 code related to the Accessory Delay Relay Coil Circuit Open in a Mercury?

- While some DIY enthusiasts may be able to diagnose and repair this issue, it is recommended to have the necessary tools, knowledge, and experience to work on automotive electrical systems safely and effectively.

10. How long does it typically take to repair the B1303 code related to the Accessory Delay Relay Coil Circuit Open in a Mercury?

- The repair time can vary depending on the extent of the issue and the expertise of the technician, but it may take anywhere from a few hours to a full day to complete the repair.