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Engine-Codes – RAM – B17B8 RAM

B17B8 RAM Code - Left Stop Lamp Control Circuit Overcurrent

Quick Answer

The B17B8 diagnostic trouble code (DTC) refers to a Left Stop Lamp Control Circuit Overcurrent. Common causes include Short circuit in the wiring, Faulty brake light switch, Malfunctioning control module. 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
B17B8 RAM indicates Left Stop Lamp Control Circuit Overcurrent.
Common causes
Common causes include Short circuit in the wiring, Faulty brake light switch, Malfunctioning control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code B17B8 RAM Description

The B17B8 diagnostic trouble code (DTC) refers to a Left Stop Lamp Control Circuit Overcurrent. This code indicates that there is an excessive amount of current flowing through the control circuit for the left stop lamp. The stop lamp control circuit is responsible for turning on and off the left stop lamp when the brake pedal is depressed. When the amount of current exceeds the specified limit, it triggers this code.

OBDII Code B17B8 RAM - Left Stop Lamp Control Circuit Overcurrent
B17B8 RAM Code - Left Stop Lamp Control Circuit Overcurrent

Common Causes of B17B8 RAM

  1. Short circuit in the wiring
  2. Faulty brake light switch
  3. Malfunctioning control module
  4. Defective stop lamp
  5. Corrosion or damage in the electrical connections

Symptoms of B17B8 RAM

  1. Left stop lamp remains illuminated constantly
  2. Left stop lamp does not illuminate when the brake pedal is pressed
  3. Dashboard warning light may illuminate
  4. Other electrical issues related to the left stop lamp

How to Fix B17B8 RAM

  1. Begin by visually inspecting the wiring and connections for any signs of damage or corrosion. Repair or replace any damaged components.
  2. Test the brake light switch to ensure it is functioning correctly. Replace if necessary.
  3. Use a multimeter to test the control module for proper operation. Replace if found to be faulty.
  4. Check the stop lamp itself for any defects and replace if needed.
  5. Clear the DTC from the vehicle's computer and test the left stop lamp to ensure it is functioning properly.

Cost to Fix B17B8 RAM

The cost of repairing a Left Stop Lamp Control Circuit Overcurrent issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $100 and $300 for parts and labor. It is important to note that diagnostic time and labor rates can vary, so it is advisable to get a quote from a reputable auto repair shop in your area.

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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 B17B8 RAM Code

1. What does the OBDII code B17B8 mean on a RAM vehicle?

B17B8 indicates an issue with the left stop lamp control circuit, specifically an overcurrent condition, meaning excessive electrical current has been detected.

2. What are the common symptoms of the B17B8 code?

Symptoms may include the left brake light not functioning, flickering, or staying on constantly, along with a possible warning light on the dashboard.

3. What causes the B17B8 code to appear?

Common causes include a short circuit in the wiring, a faulty left brake light bulb, a damaged bulb socket, or a malfunctioning Body Control Module (BCM).

4. Can I still drive my RAM with the B17B8 code?

While the vehicle may still be drivable, it’s unsafe to drive with a malfunctioning brake light as it can lead to accidents or legal issues.

5. How do I diagnose the B17B8 code?

Diagnosis involves checking the left brake light bulb, inspecting the wiring and connectors for damage or short circuits, and testing the Body Control Module for faults.

6. How can I fix the B17B8 code?

Repair may involve replacing the bulb, repairing or replacing damaged wiring, cleaning or replacing the bulb socket, or reprogramming or replacing the BCM if necessary.

7. How much does it cost to repair the B17B8 code?

Costs vary depending on the issue; replacing a bulb is inexpensive, while repairing wiring or replacing the BCM can be more costly, ranging from $50 to $600 or more.

8. Does the B17B8 code always mean the BCM is faulty?

No, the BCM is not always the issue. The problem is often with the bulb, socket, or wiring, so these should be checked first.

9. Can a blown fuse cause the B17B8 code?

Yes, a blown fuse related to the stop lamp circuit can cause or be a result of the overcurrent condition, so it should be checked during diagnosis.

10. Will clearing the code with a scan tool fix the problem?

Clearing the code may temporarily remove the warning, but the underlying issue must be resolved to prevent the code from returning.

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