AutoCodes – Buick – B3287 Buick

B3287 Buick Code - Left Rear Window Express Up or Down Circuit Low

Quick Answer

This Diagnostic Trouble Code (DTC) is generated by a passenger door window switch or a passenger door window switch circuit. Common causes include Faulty Left Rear Window Switch, Left Rear Window Switch harness is open or shorted, Left Rear Window Switch 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: B3287 Buick indicates Left Rear Window Express Up or Down Circuit Low.
Common causes: Common causes include Faulty Left Rear Window Switch, Left Rear Window Switch harness is open or shorted, Left Rear Window Switch 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 384

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 Mar 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3287 Buick Description

This Diagnostic Trouble Code (DTC) is generated by a passenger door window switch or a passenger door window switch circuit. Each passenger door window switch is mounted to the trim panel of the appropriate passenger door. The circuits and contacts of each passenger door window switch receive battery voltage and ground from the corresponding door module, i.e. Front Passenger Door Module (PDM), Left Rear Door Module (LRDM), or Right Rear Door Module (RRDM). When a passenger door window switch is operated, the switch contacts close and the associated door module interprets the flow of voltage as a specific request to move the window up or down. If conditions are correct for window operation to occur, the door module then powers the associated window motor and circuits to move the window.

OBDII Code B3287 Buick - Left Rear Window Express Up or Down Circuit Low - AutoCodes.com — B3287 Buick Code - Left Rear Window Express Up or Down Circuit Low

What does this mean?

What are the Possible Causes of the DTC B3287 Buick?

Faulty Left Rear Window Switch
Left Rear Window Switch harness is open or shorted
Left Rear Window Switch circuit poor electrical connection
Faulty Left Rear Door Module (LRDM)

How to Fix the DTC B3287 Buick?

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 B3287 Buick 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 B3287 Buick Code

1. What does OBDII code B3287 mean on a Buick?

Code B3287 indicates a problem with the Left Rear Window Express Up or Down Circuit, specifically a low voltage condition in the circuit.

2. What are common symptoms of code B3287 in a Buick?

Symptoms may include the left rear window not moving up or down using the express function or the window being completely inoperative.

3. What causes code B3287 to appear in a Buick?

Common causes include a faulty window switch, damaged wiring or connectors in the circuit, or a malfunctioning window motor.

4. Can code B3287 trigger other warning signs in a Buick?

This code may not trigger dashboard warning lights, but you might notice reduced functionality in the left rear window controls.

5. How can I diagnose the root cause of code B3287?

Start by inspecting the wiring and connectors for damage or corrosion, then test the window switch and motor for proper operation using a multimeter.

6. Is code B3287 specific to Buicks with express window functionality?

Yes, this code is specific to models equipped with an express up or down feature for the left rear window.

7. Can I fix code B3287 on my Buick myself?

If you're comfortable working with electrical components, you can check for loose connectors or damaged wires. For more complex repairs, such as replacing the switch or motor, professional help may be needed.

8. Does code B3287 mean the entire window assembly needs replacement?

Not necessarily. The issue could be isolated to the switch, wiring, or motor, so replacing the entire assembly is usually unnecessary.

9. How much does it cost to repair code B3287 on a Buick?

Repair costs can vary, but replacing a window switch or motor typically ranges from $100 to $300, depending on parts and labor.

10. Can ignoring code B3287 cause further damage?

While the code itself may not lead to serious issues, ignoring it could leave the window inoperative and potentially expose the interior to weather or security risks.