AutoCodes – Cadillac – B0287 Cadillac

B0287 Cadillac Code - Electric Rear Defrost Circuit Open

Quick Answer

The Liftgate Module (LGM) monitors the voltage level on the supply voltage circuit of the rear window defogger. Common causes include Faulty Liftgate Module (LGM), Liftgate Module (LGM) harness is open or shorted, Liftgate Module (LGM) circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0287 Cadillac indicates Electric Rear Defrost Circuit Open.
Common causes: Common causes include Faulty Liftgate Module (LGM), Liftgate Module (LGM) harness is open or shorted, Liftgate Module (LGM) circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 750

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0287 Cadillac Description

The Liftgate Module (LGM) monitors the voltage level on the supply voltage circuit of the rear window defogger. The LGM test the supply voltage circuit of the rear window defogger every 160 milliseconds. With the rear window defogger inactive, the supply voltage circuit of the rear window defogger will have no voltage present. With the rear window defogger active, the supply voltage circuit of the rear window defogger will be near system voltage.

OBDII Code B0287 Cadillac - Electric Rear Defrost Circuit Open - AutoCodes.com — B0287 Cadillac Code - Electric Rear Defrost Circuit Open

What does this mean?

What are the Possible Causes of the DTC B0287 Cadillac?

Faulty Liftgate Module (LGM)
Liftgate Module (LGM) harness is open or shorted
Liftgate Module (LGM) circuit poor electrical connection

How to Fix the DTC B0287 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 B0287 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 B0287 Cadillac Code

1. What are the common symptoms of OBDII code B0287 in a Cadillac related to the Electric Rear Defrost Circuit Open?

The common symptoms include the rear defroster not working, the rear window not clearing up easily in cold weather, and a dashboard warning light indicating a fault in the defrost circuit.

2. What are the possible causes of OBDII code B0287 in a Cadillac?

Possible causes of this code include a damaged rear defrost grid, a faulty defrost switch, a blown fuse, a loose or disconnected wiring harness, or a malfunctioning control module.

3. How can I diagnose the Electric Rear Defrost Circuit Open issue in my Cadillac?

You can start by visually inspecting the rear defrost grid for any visible damage, checking the fuse related to the defrost circuit, testing the continuity of the wiring, and using a multimeter to check for voltage at various points in the circuit.

4. Can I repair the Electric Rear Defrost Circuit Open issue in my Cadillac myself?

Depending on the exact cause, you may be able to repair the issue yourself by replacing a damaged defrost grid, fixing a loose connection, or replacing a faulty switch. However, more complex issues may require professional diagnosis and repair.

5. Is it safe to continue driving my Cadillac with the OBDII code B0287 indicating an Electric Rear Defrost Circuit Open problem?

It is generally safe to drive your Cadillac with this issue, but you may experience visibility problems in cold or rainy conditions due to the rear window not clearing properly. It is recommended to address the problem as soon as possible.

6. How much does it typically cost to repair the Electric Rear Defrost Circuit Open issue in a Cadillac?

The cost of repairing this issue can vary depending on the exact cause and whether you choose to DIY or seek professional help. Repairs may range from a few dollars for a fuse replacement to a few hundred dollars for more extensive repairs.

7. Will resetting the OBDII code B0287 in my Cadillac make the issue go away?

Resetting the code may temporarily turn off the warning light, but it will not fix the underlying problem causing the Electric Rear Defrost Circuit Open issue. It is important to diagnose and address the root cause of the code.

8. Can extreme weather conditions contribute to triggering OBDII code B0287 in a Cadillac?

Yes, extreme weather conditions like freezing temperatures or heavy snowfall can potentially contribute to triggering this code if the rear defrost system is under strain or if there is existing damage to the components.

9. Are there any preventive measures I can take to avoid the Electric Rear Defrost Circuit Open issue in my Cadillac?

To prevent this issue, regularly inspect and maintain your rear defrost system, avoid using sharp objects on the rear window, be gentle when scraping ice off the window, and ensure proper electrical connections.

10. How long does it typically take to repair the Electric Rear Defrost Circuit Open issue in a Cadillac?

The repair time can vary depending on the complexity of the issue and the availability of parts. Simple fixes like replacing a fuse or reconnecting a wire can be done quickly, while more involved repairs may take several hours or more.