AutoCodes – Cadillac – B3387 Cadillac

B3387 Cadillac Code - Right Front Window Up Switch Circuit Low

Quick Answer

The window switch or window switch circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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: B3387 Cadillac indicates Right Front Window Up Switch Circuit Low.
Common causes: Common causes include Faulty Driver Door Switch Assembly (DDSA), Driver Door Switch Assembly (DDSA) harness is open or shorted, Driver Door Switch Assembly (DDSA) 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 496

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3387 Cadillac Description

The window switch or window switch circuits that generate this Diagnostic Trouble Code (DTC) are built-in parts of the Driver Door Switch Assembly (DDSA). There are no external circuits. The DDSA internally supplies power and ground to the contacts of each of the integral window switches. When one of the switches is operated, the switch contacts close, providing the DDSA with a specific window switch signal. The DDSA processes this signal, assigns a digital message to it, and sends the message to the appropriate Driver Door Module (DDM), Passenger Front Door Module (PDM), Left Rear Door Module (LRDM), or Right Rear Door Module (RRDM), via the class 2 serial data circuit. The door module, upon receiving the message, examines other relevant information available on the class 2 serial data line in order to determine if conditions are correct for window operation to occur. If conditions are correct, the door module applies power and ground to the associated window motor and circuits in order to move the window. If the DDSA determines that one of its built in window switches is closed for more than 15 continuous seconds, it sets the DTC.

OBDII Code B3387 Cadillac - Right Front Window Up Switch Circuit Low - AutoCodes.com — B3387 Cadillac Code - Right Front Window Up Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3387 Cadillac?

Faulty Driver Door Switch Assembly (DDSA)
Driver Door Switch Assembly (DDSA) harness is open or shorted
Driver Door Switch Assembly (DDSA) circuit poor electrical connection
Faulty Passenger Front Door Module (PDM)
Faulty Driver Door Module (DDM)

How to Fix the DTC B3387 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 B3387 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 B3387 Cadillac Code

1. What are the common symptoms of OBDII code B3387 in a Cadillac related to the right front window up switch circuit low?

The common symptoms include the right front window being inoperative or experiencing issues going up.

2. What could cause the OBDII code B3387 in a Cadillac indicating a right front window up switch circuit low?

Possible causes of this code include a faulty window switch, damaged wiring or connectors in the circuit, or a malfunctioning window regulator.

3. How can I diagnose the OBDII code B3387 in a Cadillac for the right front window up switch circuit low?

You can diagnose this issue by checking the wiring and connections related to the right front window switch, testing the switch itself for proper functionality, and inspecting the window regulator for any faults.

4. Can a DIY enthusiast repair the OBDII code B3387 Cadillac right front window up switch circuit low issue?

Depending on your skill level and experience with automotive repairs, you may be able to fix this issue yourself by replacing the faulty window switch, repairing damaged wiring, or addressing any other identified issues in the circuit.

5. Are there any safety considerations to keep in mind when dealing with the OBDII code B3387 Cadillac right front window up switch circuit low problem?

When working on electrical components like window switches and wiring, it is essential to disconnect the car's battery to prevent electrical shocks or short circuits. Always exercise caution and refer to the vehicle's service manual for guidance.

6. Is it necessary to reset the OBDII code B3387 in a Cadillac after repairing the right front window up switch circuit low issue?

After addressing the underlying problem causing the code, it is recommended to clear the code using an OBDII scanner to reset the system and ensure the repair was successful.

7. Can extreme weather conditions contribute to triggering the OBDII code B3387 Cadillac right front window up switch circuit low?

Extreme temperatures or moisture can potentially impact the electrical components involved in the right front window switch circuit, leading to malfunctions that trigger this diagnostic trouble code.

8. What role does the right front window up switch circuit low play in the overall functionality of a Cadillac vehicle?

The right front window switch circuit is crucial for controlling the movement of the right front window, and a fault in this circuit can result in the window being stuck in a particular position or becoming inoperable.

9. Are there any preventive maintenance measures to avoid encountering the OBDII code B3387 related to the right front window up switch circuit low?

Regularly checking the condition of window switches, wiring, and connectors, as well as addressing any issues promptly, can help prevent the occurrence of this OBDII code in a Cadillac.

10. How long does it typically take to repair the OBDII code B3387 Cadillac indicating a right front window up switch circuit low?

The repair time can vary depending on the specific cause of the issue, your experience level, and the availability of replacement parts. In general, diagnosing and fixing this problem can take anywhere from a few hours to a day.