AutoCodes – Lincoln – B1303 Lincoln

B1303 Lincoln 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 Lincoln 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 786

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

What does this mean?

What are the Possible Causes of the DTC B1303 Lincoln?

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 Lincoln?

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 Lincoln 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 Lincoln Code

1. What does the OBDII code B1303 indicate on a Lincoln?

- Code B1303 indicates that there is an open circuit in the accessory delay relay coil, which may affect the operation of vehicle accessories that use this relay such as power windows or radio.

2. What are common symptoms of code B1303 in a Lincoln?

- Symptoms commonly associated with code B1303 include accessories that do not operate when the ignition is in the accessory position, intermittent accessory function, or the battery draining faster than usual.

3. What causes an accessory delay relay coil circuit to be open in Lincolns?

- Possible causes include a faulty accessory delay relay, damaged wiring or connectors in the relay circuit, or issues with the fuse related to the accessory delay relay.

4. How can I troubleshoot and fix the B1303 code on my Lincoln?

- Start by checking the accessory delay relay for any signs of damage or corrosion. Inspect the wiring and connectors for breaks or loose connections. Replace any faulty components and check the fuse associated with this circuit.

5. Is it safe to drive my Lincoln with the B1303 code?

- While driving with code B1303 might not directly affect vehicle drivability, the lack of functioning accessories can be inconvenient and certain features like power windows may not work, which can be a safety concern in emergency situations.

6. What tools are needed to diagnose the B1303 code on a Lincoln?

- You will need a digital multimeter to test the continuity and resistance in the relay coil circuit and an OBDII scanner to read and clear the code. A wiring diagram for your specific model can also be very helpful.

7. Can a dead battery cause code B1303 to appear on a Lincoln?

- While a dead battery itself wonâ€™t cause this specific code, issues with charging or electrical systems leading to low voltage conditions can contribute to accessory relay malfunctions, which might trigger code B1303.

8. How much does it typically cost to repair the issue associated with the B1303 code in a Lincoln?

- The cost can vary based on the specific cause and your location. If itâ€™s a simple relay replacement, it might cost between $50 and $150 including parts and labor. More extensive wiring repairs can increase the cost significantly.

9. How often do accessory delay relay issues occur in Lincolns?

- Such issues are not extremely common but can occur due to aging of vehicle electrical components or due to environmental factors such as moisture or excessive heat which can damage circuits and relays.