AutoCodes – Mercury – B1302 Mercury

B1302 Mercury Code - Accessory Delay Relay Coil Circuit Failure

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: B1302 Mercury indicates Accessory Delay Relay Coil Circuit Failure.
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 1,036

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 B1302 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 B1302 Mercury - Accessory Delay Relay Coil Circuit Failure - AutoCodes.com — B1302 Mercury Code - Accessory Delay Relay Coil Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1302 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 B1302 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 B1302 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.

Need more information about the B1302 Mercury code?

Need more information on how to fix the B1302 Mercury code? Get Access to Factory Service Manuals

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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 B1302 Mercury Code

1. What are the common symptoms of OBDII code B1302 in a Mercury related to the Accessory Delay Relay Coil Circuit Failure?

Common symptoms include issues with delayed power functions such as power windows, radio, interior lights, or other accessories not working properly.

2. What are the possible causes of the B1302 OBDII code in a Mercury?

The code B1302 can be triggered by a faulty accessory delay relay, damaged wiring in the circuit, or a malfunctioning accessory delay relay coil.

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

You can diagnose the issue by checking the relay and associated wiring for any visible damage or using a multimeter to test for continuity and proper voltage levels in the circuit.

4. Can a DIY enthusiast repair the Accessory Delay Relay Coil Circuit Failure in a Mercury?

If you have experience working with automotive electrical systems, you may be able to replace the faulty relay or repair damaged wiring yourself. However, it's recommended to consult a professional if you're uncertain.

5. Is it safe to continue driving my Mercury with the B1302 OBDII code present?

While the vehicle may still be drivable with this code, it's best to address the issue promptly to avoid potential electrical problems or accessory failures while driving.

6. Will resetting the OBDII system clear the B1302 code in my Mercury?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the Accessory Delay Relay Coil Circuit Failure is not fixed, the code is likely to reappear.

7. How much does it typically cost to repair the B1302 code in a Mercury at a repair shop?

The cost of repairing the Accessory Delay Relay Coil Circuit Failure can vary depending on the extent of the damage and the labor rates of the repair shop. It's advisable to obtain quotes from different shops.

8. Can extreme weather conditions contribute to triggering the B1302 OBDII code in a Mercury?

Yes, extreme temperature fluctuations or moisture exposure can potentially affect the accessory delay relay and its circuit, leading to the B1302 code being triggered.

9. Are there any preventive maintenance tips to avoid encountering the B1302 code in a Mercury?

Regularly inspecting the electrical components, including the accessory delay relay, for signs of wear or damage can help prevent the occurrence of the Accessory Delay Relay Coil Circuit Failure.

10. Will the B1302 code in a Mercury cause the check engine light to illuminate?

While the B1302 code is related to an accessory delay relay issue, it may not always trigger the check engine light. However, it can still be stored in the vehicle's diagnostic system for retrieval.