AutoCodes – Generic – B2505

B2505 Code - Left Lamp High Beam Circuit Failure

Quick Answer

The Smart Junction Box (SJB) sends reference signals to the headlamp switch through circuits. Common causes include Faulty Left Lamp High Beam, Left Lamp High Beam harness is open or shorted, Left Lamp High Beam 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: B2505 indicates Left Lamp High Beam Circuit Failure.
Common causes: Common causes include Faulty Left Lamp High Beam, Left Lamp High Beam harness is open or shorted, Left Lamp High Beam 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 7,043

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 Dec 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2505 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. 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 voltage from the Left (LH) high beam voltage supply circuit.

OBDII Code B2505 - Left Lamp High Beam Circuit Failure - AutoCodes.com — B2505 Code - Left Lamp High Beam Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B2505?

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

How to Fix the DTC B2505?

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 B2505 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 B2505 code?

Need more information on how to fix the B2505 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2505 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2505 Chrysler — Left Power Sliding Door Latch Release Ratchet Primary Switch Performance
B2505 Dodge — Left Power Sliding Door Latch Release Ratchet Primary Switch Performance
B2505 Ford — Left Lamp High Beam Circuit Failure
B2505 Lexus — Short In Luggage Door Drive Motor Right Circuit
B2505 Lincoln — Left Lamp High Beam Circuit Failure
B2505 Mercury — Left Lamp High Beam Circuit Failure
B2505 RAM — Left Power Sliding Door Latch Release Ratchet Primary Switch Performance

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 B2505 Code

1. What are the common symptoms of OBDII code B2505 - Left Lamp High Beam Circuit Failure?

- Common symptoms include the high beam left lamp not working, flickering high beam light, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B2505 - Left Lamp High Beam Circuit Failure?

- Possible causes include a faulty high beam bulb, damaged wiring or connectors, a defective high beam switch, or a problem with the vehicleâ€™s body control module.

3. How can I diagnose OBDII code B2505 - Left Lamp High Beam Circuit Failure?

- Diagnosis involves visually inspecting the high beam bulb, checking the wiring and connectors for damage, testing the high beam switch, and using a multimeter to check for continuity in the circuit.

4. Can I repair OBDII code B2505 - Left Lamp High Beam Circuit Failure myself?

- If you have experience with automotive electrical systems, you may be able to repair this issue yourself by replacing the high beam bulb, repairing damaged wiring, or replacing the faulty components.

5. Are there any troubleshooting tips for OBDII code B2505 - Left Lamp High Beam Circuit Failure?

- Troubleshooting tips include checking the fuse related to the high beam circuit, ensuring the bulb is properly seated and functioning, and inspecting the high beam switch for any issues.

6. Is it safe to continue driving with OBDII code B2505 - Left Lamp High Beam Circuit Failure?

- It is not recommended to drive with a malfunctioning high beam circuit as it can affect visibility at night and compromise road safety.

7. How much does it typically cost to repair OBDII code B2505 - Left Lamp High Beam Circuit Failure?

- The cost of repair can vary depending on the underlying cause, but it may range from replacing a bulb for a few dollars to addressing wiring issues or component replacements that can cost a few hundred dollars.

8. Can a malfunctioning high beam circuit affect other vehicle systems?

- While the high beam circuit failure itself may not directly impact other systems, it is important to address the issue promptly to prevent potential electrical problems in the future.

9. Will resetting the OBDII code B2505 - Left Lamp High Beam Circuit Failure make the issue go away?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the fault again.

10. How can I prevent OBDII code B2505 - Left Lamp High Beam Circuit Failure in the future?

- To prevent this issue, regularly inspect and maintain the vehicle's lighting system, promptly address any flickering or malfunctioning lights, and avoid overloading the electrical circuits by using appropriate bulbs and components.