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Engine-Codes – RAM – B1628 RAM

B1628 RAM Code - Cargo Lamp Control Circuit High

Quick Answer

The B1628 RAM diagnostic trouble code (DTC) indicates a problem with the cargo lamp control circuit being too high. Common causes include Faulty cargo lamp switch, Short circuit in the cargo lamp wiring, Corrosion or loose connections in the cargo lamp circuit. 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
B1628 RAM indicates Cargo Lamp Control Circuit High.
Common causes
Common causes include Faulty cargo lamp switch, Short circuit in the cargo lamp wiring, Corrosion or loose connections in the cargo lamp circuit.
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 17, 2024
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Code B1628 RAM Description

The B1628 RAM diagnostic trouble code (DTC) indicates a problem with the cargo lamp control circuit being too high. This code is typically found in vehicles equipped with a cargo lamp that illuminates the bed of a pickup truck or cargo area of an SUV. The cargo lamp control circuit is responsible for turning the cargo lamp on and off as needed. When this circuit detects a high voltage, it triggers the B1628 code.

OBDII Code B1628 RAM - Cargo Lamp Control Circuit High
B1628 RAM Code - Cargo Lamp Control Circuit High

Common Causes of B1628 RAM

  1. Faulty cargo lamp switch
  2. Short circuit in the cargo lamp wiring
  3. Corrosion or loose connections in the cargo lamp circuit
  4. Defective cargo lamp control module
  5. Water intrusion causing damage to the cargo lamp circuit

Symptoms of B1628 RAM

  1. Cargo lamp stays on constantly
  2. Cargo lamp flickers intermittently
  3. Cargo lamp does not turn on at all
  4. Battery drain due to cargo lamp staying on
  5. Dashboard warning light indicating an issue with cargo lamp control circuit

How to Fix B1628 RAM

  1. Begin by inspecting the cargo lamp switch for any visible damage or signs of wear. Replace the switch if necessary.
  2. Check the cargo lamp wiring for any shorts or breaks. Repair or replace damaged wiring as needed.
  3. Inspect all connections in the cargo lamp circuit for corrosion or looseness. Clean or tighten connections to ensure proper electrical contact.
  4. Test the cargo lamp control module for functionality. Replace the module if it is found to be defective.
  5. Verify that there is no water intrusion in the cargo lamp circuit. Seal any areas where water may be entering to prevent future damage.

Cost to Fix B1628 RAM

The typical repair costs for addressing the B1628 RAM code can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the parts and labor for this repair can range from $100 to $300. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary significantly. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to check local rates for a more accurate estimate.

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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 B1628 RAM Code

1. What are the common symptoms of OBDII code B1628 RAM?

The common symptoms of OBDII code B1628 RAM include the cargo lamp remaining on or flickering intermittently, even when it is not supposed to be illuminated.

2. What are the possible causes of the Cargo Lamp Control Circuit High code B1628 RAM?

The possible causes of code B1628 RAM include a faulty cargo lamp switch, damaged wiring in the cargo lamp circuit, or a malfunctioning body control module.

3. How can I diagnose the cause of OBDII code B1628 RAM?

To diagnose the cause of code B1628 RAM, you can start by visually inspecting the cargo lamp switch and wiring for any visible damage. You can also use a multimeter to test the continuity and voltage in the circuit to pinpoint the issue.

4. What are some repair tips for fixing code B1628 RAM?

Some repair tips for addressing code B1628 RAM include checking and replacing the cargo lamp switch if necessary, repairing any damaged wiring in the circuit, and resetting the body control module to clear the code.

5. Can I continue driving my vehicle with OBDII code B1628 RAM?

It is generally safe to continue driving your vehicle with code B1628 RAM, especially if the cargo lamp is the only affected component. However, it is recommended to address the issue promptly to avoid any potential electrical issues or draining of the battery.

6. How do I reset OBDII code B1628 RAM after making repairs?

You can reset OBDII code B1628 RAM using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. After resetting the code, monitor the cargo lamp to ensure the issue has been resolved.

7. Can extreme weather conditions trigger OBDII code B1628 RAM?

Extreme weather conditions such as excessive heat or moisture can potentially cause electrical issues in the cargo lamp circuit, leading to the triggering of code B1628 RAM. It is essential to inspect and repair any weather-related damage promptly.

8. Is OBDII code B1628 RAM a common issue in certain vehicle makes and models?

Code B1628 RAM may be more common in certain vehicle makes and models, particularly those with cargo lamp control circuits that are prone to wiring issues or component failures. However, it can occur in any vehicle with a cargo lamp system.

9. Are there any preventive maintenance steps to avoid OBDII code B1628 RAM?

To prevent OBDII code B1628 RAM, you can periodically inspect the cargo lamp circuit for any signs of wear or damage, avoid overloading the cargo area to prevent strain on the wiring, and promptly address any electrical issues as they arise.

10. Can I fix OBDII code B1628 RAM myself, or do I need to take it to a professional mechanic?

If you have experience with automotive electrical systems and access to the necessary tools, you may be able to diagnose and repair OBDII code B1628 RAM yourself. However, if you are unsure or uncomfortable working on electrical components, it is advisable to seek the assistance of a professional mechanic.

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