AutoCodes – Mercury – B1472 Mercury

B1472 Mercury Code - Lamp Headlamp Input Circuit Short To Ground

Quick Answer

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. Common causes include Faulty Headlamp Switch, Headlamp Switch harness is open or shorted, Headlamp Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1472 Mercury indicates Lamp Headlamp Input Circuit Short To Ground.
Common causes: Common causes include Faulty Headlamp Switch, Headlamp Switch harness is open or shorted, Headlamp Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 662

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1472 Mercury Description

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. When the headlamp switch is placed in the HEADLAMPS ON position, the voltage signal is routed to ground through the circuit. If the SJB detects a fault with the headlamp switch inputs, the SJB turns the exterior lamps on by default. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the LOW BEAM position, the SJB sends voltage through circuits to the low beam headlamps. When the SJB detects the headlamp switch in the HEADLAMPS ON position and the multifunction switch in the HIGH BEAM position, the SJB sends voltage through circuits to the high beam headlamps. The SJB sends a reference signal to the multifunction switch through circuits CLF27 (GN/BN) and CLF17 (WH/OG). When the multifunction switch is placed in the FLASH-TO-PASS or HIGH BEAM position, the voltage signal is routed to ground. When the SJB detects a request for the flash-to-pass, the SJB sends voltage to the high beam headlamps. The OBDII codes when the SJB detects a short to ground from the headlamps on request circuit or no input from the headlamp switch.

OBDII Code B1472 Mercury - Lamp Headlamp Input Circuit Short To Ground - AutoCodes.com — B1472 Mercury Code - Lamp Headlamp Input Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1472 Mercury?

Faulty Headlamp Switch
Headlamp Switch harness is open or shorted
Headlamp Switch circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1472 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 B1472 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 B1472 Mercury code?

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Need Help with the Code?

Get the B1472 Mercury code diagnosed by a professional: Find a repair shop in your area

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 B1472 Mercury Code

1. What are the common symptoms of OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- Common symptoms include a non-functioning headlamp, flickering or dim headlamp, or intermittent headlamp operation.

2. What can cause the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- Possible causes include a short to ground in the headlamp circuit, damaged wiring or connectors, a faulty headlamp switch, or a defective headlamp control module.

3. How can I diagnose the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- Use a multimeter to check for continuity and resistance in the headlamp circuit, inspect the wiring and connectors for damage, and test the headlamp switch and control module for proper operation.

4. Can a blown fuse cause the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- Yes, a blown fuse in the headlamp circuit can lead to a short to ground condition and trigger the B1472 trouble code.

5. What are the repair tips for fixing the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- Repair tips include repairing or replacing damaged wiring, connectors, or components in the headlamp circuit, resetting the trouble code after repairs are completed, and testing the headlamp operation.

6. Is it safe to continue driving with the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- It is not recommended to drive with this issue as it can compromise visibility and safety, especially during nighttime or low-light driving conditions.

7. How much does it typically cost to repair the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve labor costs for diagnosis and repair, as well as the cost of any necessary parts or components.

8. Can I reset the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground without fixing the underlying issue?

- While you can clear the trouble code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent it from reoccurring and ensure proper headlamp operation.

9. Are there any recalls or technical service bulletins related to the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- Check with your local Mercury dealership or visit the NHTSA website to see if there are any recalls or technical service bulletins related to this specific OBDII trouble code.

10. Can a DIY enthusiast without much experience fix the OBDII code B1472 (Mercury) Lamp Headlamp Input Circuit Short To Ground?

- While some troubleshooting steps can be performed by a DIY enthusiast, repairing a short to ground in the headlamp circuit may require advanced electrical knowledge and tools, so it is advisable to seek professional help if needed.