AutoCodes – Generic – B1472

B1472 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 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 10,121

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

What does this mean?

What are the Possible Causes of the DTC B1472?

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?

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 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 code?

Need more information on how to fix the B1472 code? Get Access to Factory Service Manuals

Need Help with the Code?

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

Information for Specific Makes

B1472 Chrysler — Channel 4 Audio Speaker Output Circuit Open
B1472 Dodge — Channel 4 Audio Speaker Output Circuit Open
B1472 Ford — Lamp Headlamp Input Circuit Short To Ground
B1472 Jeep — Channel 4 Audio Speaker Output Circuit Open
B1472 Lexus — A/C Inverter High Voltage Output System Malfunction
B1472 Lincoln — Lamp Headlamp Input Circuit Short To Ground
B1472 Mercury — Lamp Headlamp Input Circuit Short To Ground
B1472 RAM — Channel 4 Audio Speaker Output Circuit Open
B1472 Toyota — A/C Inverter High Voltage Output System Malfunction

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 Code

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

- Common symptoms include headlights not working properly, flickering or dimming lights, and possible dashboard warning lights.

2. What are some possible causes of the Lamp Headlamp Input Circuit Short To Ground fault code?

- Potential causes can include a short circuit in the headlamp wiring, damaged headlamp connectors, or a faulty headlamp control module.

3. How can I diagnose the issue causing OBDII code B1472?

- Diagnosing the problem may involve checking the headlamp wiring for damage, testing the headlamp connectors for continuity, and inspecting the headlamp control module for faults.

4. Can a DIY enthusiast repair OBDII code B1472 at home?

- Depending on your experience and comfort level with automotive repairs, you may be able to repair this issue at home by identifying and fixing the short circuit or damaged components.

5. Is it safe to continue driving with the Lamp Headlamp Input Circuit Short To Ground fault code?

- It is not recommended to drive with this fault code active, as it can affect the proper functioning of your headlights and compromise visibility, especially at night.

6. How much does it typically cost to repair OBDII code B1472?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing damaged wiring, connectors, or components, which can range from relatively inexpensive to more costly.

7. Can a faulty headlamp bulb cause the Lamp Headlamp Input Circuit Short To Ground fault code?

- While a faulty headlamp bulb itself may not directly cause this fault code, it can be a sign of other underlying electrical issues that may need to be addressed.

8. Will resetting the OBDII code B1472 clear the issue permanently?

- Resetting the code without addressing the root cause will likely not resolve the problem permanently, as the fault will likely reappear until the underlying issue is fixed.

9. Are there any preventive measures to avoid encountering the Lamp Headlamp Input Circuit Short To Ground fault code?

- Regularly inspecting your vehicle's headlamp system for any signs of damage, ensuring proper installation of components, and addressing any electrical issues promptly can help prevent this fault code from occurring.

10. Can a professional mechanic help diagnose and repair OBDII code B1472?

- Yes, a qualified mechanic can use specialized tools and expertise to accurately diagnose the issue causing the fault code and recommend the necessary repairs to fix the problem effectively.