AutoCodes – GMC – B2533 GMC

B2533 GMC Code - Lamp Relay Control Circuit Is Shorted To Battery Positive Voltage

Quick Answer

The Fog Lamp Relay is controlled by the Body Control Module (BCM). Common causes include Faulty Fog Lamp Relay, Fog Lamp Relay harness is open or shorted, Fog Lamp Relay 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: B2533 GMC indicates Lamp Relay Control Circuit Is Shorted To Battery Positive Voltage.
Common causes: Common causes include Faulty Fog Lamp Relay, Fog Lamp Relay harness is open or shorted, Fog Lamp Relay 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 717

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 Jan 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2533 GMC Description

The Fog Lamp Relay is controlled by the Body Control Module (BCM). Battery positive voltage is applied to the coil side of the fog lamp relay. The BCM grounds the fog lamp relay control circuit in order to turn on the fog lamp relay. When the fog lamp relay control circuit becomes shorted to battery positive voltage, DTC B2533 is set.

OBDII Code B2533 GMC - Lamp Relay Control Circuit Is Shorted To Battery Positive Voltage - AutoCodes.com — B2533 GMC Code - Lamp Relay Control Circuit Is Shorted To Battery Positive Voltage

What does this mean?

What are the Possible Causes of the DTC B2533 GMC?

Faulty Fog Lamp Relay
Fog Lamp Relay harness is open or shorted
Fog Lamp Relay circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2533 GMC?

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 B2533 GMC 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 B2533 GMC code?

Need more information on how to fix the B2533 GMC code? Get Access to Factory Service Manuals

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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 B2533 GMC Code

1. What are common symptoms of OBDII code B2533 GMC?

- Common symptoms include the malfunction indicator lamp (MIL) being illuminated on the dashboard and possible issues with the lighting system.

2. What can cause the Lamp Relay Control Circuit to be shorted to battery positive voltage?

- The most common cause is a wiring issue, such as a short circuit or damaged wires, that is causing the relay control circuit to be connected to the battery positive voltage.

3. How can I diagnose the cause of OBDII code B2533 GMC?

- Diagnosing this code typically involves using a multimeter to check for voltage irregularities in the lamp relay control circuit, inspecting the wiring for damage, and testing the relay itself.

4. Can I still drive my GMC with OBDII code B2533 present?

- It is generally not recommended to drive the vehicle with this code present, as it can indicate a potential electrical issue that may affect the operation of critical systems.

5. How do I repair OBDII code B2533 GMC?

- Repairing this code often involves identifying and fixing the short circuit in the lamp relay control circuit, repairing or replacing damaged wiring, and ensuring proper functioning of the relay.

6. Will resetting the OBDII code B2533 GMC resolve the issue?

- Resetting the code without addressing the underlying cause, such as a shorted circuit, will likely result in the code reappearing once the issue persists.

7. Are there any safety concerns associated with OBDII code B2533 GMC?

- While the code itself may not pose an immediate safety risk, electrical issues in the vehicle can potentially lead to malfunctions in critical systems, so it's important to address the problem promptly.

8. Can a DIY enthusiast repair OBDII code B2533 GMC at home?

- Depending on the individual's skill level and access to tools, it may be possible to repair this code at home by following diagnostic procedures and making necessary repairs to the circuit.

9. What is the typical cost to repair OBDII code B2533 GMC at a professional auto repair shop?

- The cost of repair can vary depending on the extent of the damage and the labor rates of the repair shop, but it may involve diagnostic fees, wiring repairs, and potentially relay replacement.

10. Is OBDII code B2533 GMC a common issue in GMC vehicles?

- While not as common as some other OBDII codes, issues with the lamp relay control circuit can occur in GMC vehicles, especially in older models or those with electrical system problems.