AutoCodes – Cadillac – B2625 Cadillac

B2625 Cadillac Code - Display Dimming Pulse Width Modulation Output Circuit

Quick Answer

The Body Control Module (BCM) receives a variable voltage signal from the Instrument Panel (I/P) dimmer switch requesting to illuminate the dimming lamps to a desired intensity. Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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: B2625 Cadillac indicates Display Dimming Pulse Width Modulation Output Circuit.
Common causes: Common causes include Faulty Body Control Module (BCM), Body Control Module (BCM) harness is open or shorted, Body Control Module (BCM) 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 1,232

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 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2625 Cadillac Description

The Body Control Module (BCM) receives a variable voltage signal from the Instrument Panel (I/P) dimmer switch requesting to illuminate the dimming lamps to a desired intensity. When this occurs, the BCM directly sends a Pulse Width Modulated (PWM) voltage based on the I/P dimmer switch position on the LED dimming supply circuit, instrument panel lamps dimming control circuit, and the instrument panel lamps dimming supply voltage circuit.
Voltage for the LED dimming supply circuit, instrument panel lamps dimming control circuit, and the instrument panel lamps dimming supply voltage circuit is from the TBC 2 A fuse in the I/P fuse block directly through the BCM to these circuits.

OBDII Code B2625 Cadillac - Display Dimming Pulse Width Modulation Output Circuit - AutoCodes.com — B2625 Cadillac Code - Display Dimming Pulse Width Modulation Output Circuit

What does this mean?

What are the Possible Causes of the DTC B2625 Cadillac?

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

How to Fix the DTC B2625 Cadillac?

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 B2625 Cadillac 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.

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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 B2625 Cadillac Code

1. What does the OBDII code B2625 mean on a Cadillac?

The B2625 code indicates a problem with the Display Dimming Pulse Width Modulation (PWM) Output Circuit, which controls the brightness of interior displays.

2. What are the common symptoms of code B2625 in a Cadillac?

Symptoms may include dim or non-functional dashboard and infotainment displays, flickering lights, or displays stuck at a single brightness level.

3. What causes the B2625 code to appear?

Common causes include a faulty dimmer switch, damaged wiring or connectors in the dimming circuit, or a malfunctioning body control module (BCM).

4. Can a blown fuse trigger the B2625 code on a Cadillac?

Yes, a blown fuse in the circuit responsible for the display dimming can cause the B2625 code to appear.

5. How do I troubleshoot the B2625 code on my Cadillac?

Begin by inspecting the dimmer switch, wiring, and connectors for damage or corrosion. Check for blown fuses and test the circuit with a multimeter for continuity and proper voltage.

6. Can the B2625 code cause other electrical issues in the vehicle?

While it primarily affects display dimming, unresolved issues in the PWM circuit could potentially interfere with other interior lighting systems.

7. Do I need to replace the BCM if I get a B2625 code?

Replacing the BCM should only be considered after verifying that the dimmer switch, wiring, and fuses are functioning correctly, as BCM replacement is costly and complex.

8. Can I drive my Cadillac with the B2625 code active?

Yes, the vehicle is still drivable, but the display dimming issue may affect visibility of critical information, especially at night.

9. How much does it typically cost to fix a B2625 code issue?

Repair costs vary depending on the root cause, ranging from $50 to $200 for simple repairs like replacing a switch or fuse, up to $500 or more if the BCM needs replacement.

10. Will clearing the B2625 code with a scanner fix the issue?

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