AutoCodes – Ford – B1C84 Ford

B1C84 Ford Code - Heated Rear Window Relay Output

Quick Answer

The Body Control Module (BCM) monitors the Heated Rear Window Relay Output. Common causes include Faulty Heated Rear Window Relay, Heated Rear Window Relay harness is open or shorted, Heated Rear Window 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: B1C84 Ford indicates Heated Rear Window Relay Output.
Common causes: Common causes include Faulty Heated Rear Window Relay, Heated Rear Window Relay harness is open or shorted, Heated Rear Window 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 6,046

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 Aug 26, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1C84 Ford Description

The Body Control Module (BCM) monitors the Heated Rear Window Relay Output. The BCM sets the OBDII code when the Heated Rear Window Relay Output is not to factory specifications.

OBDII Code B1C84 Ford - Heated Rear Window Relay Output - AutoCodes.com — B1C84 Ford Code - Heated Rear Window Relay Output

What does this mean?

What are the Possible Causes of the DTC B1C84 Ford?

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

How to Fix the DTC B1C84 Ford?

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 does this mean?

Code Tech Notes

B1C84:11 Heated Rear Window Relay Output Circuit Short to Ground
B1C84:12 Heated Rear Window Relay Output Circuit Short To Battery
B1C84:13 Heated Rear Window Relay Output Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1C84 Ford 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 B1C84 Ford code?

Need more information on how to fix the B1C84 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1C84 Ford code diagnosed by a professional: Find a repair shop in your area

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 B1C84 Ford Code

1. What are the common symptoms of OBDII code B1C84 Ford (Heated Rear Window Relay Output)?

- The common symptoms include the heated rear window not functioning properly, the rear defroster not turning on, or the rear window taking longer to defrost than usual.

2. What could be the potential causes of OBDII code B1C84 Ford?

- The code B1C84 Ford is often triggered by a faulty heated rear window relay, a wiring issue in the rear window circuit, or a malfunctioning rear window defroster grid.

3. How can I diagnose the cause of OBDII code B1C84 Ford?

- To diagnose the issue, you can start by checking the fuse related to the rear window defroster, inspecting the wiring connections, testing the relay, and examining the rear window defroster grid for any damage.

4. What are some repair tips for fixing OBDII code B1C84 Ford?

- Repair tips may include replacing the faulty relay, repairing any damaged wiring, ensuring proper connections in the rear window circuit, and fixing any issues with the rear window defroster grid.

5. Can driving with OBDII code B1C84 Ford cause any further damage to the vehicle?

- While driving with this code may not directly harm the vehicle, it can lead to reduced visibility due to the rear window not defrosting properly, posing a safety risk in certain weather conditions.

6. Are there any temporary solutions for OBDII code B1C84 Ford until it can be properly repaired?

- A temporary solution could be manually defrosting the rear window using a scraper or defogging spray to improve visibility until the root cause of the issue is fixed.

7. Is it safe to continue driving with a malfunctioning heated rear window related to OBDII code B1C84 Ford?

- It is not recommended to drive with a malfunctioning heated rear window as it can impair visibility, especially in cold or humid weather conditions, increasing the risk of accidents.

8. How much does it typically cost to repair OBDII code B1C84 Ford in a Ford vehicle?

- The cost of repairing OBDII code B1C84 Ford can vary depending on the underlying issue, but it may involve parts and labor costs ranging from $100 to $300 or more, depending on the extent of the repair needed.

9. Can OBDII code B1C84 Ford be triggered by issues other than the heated rear window relay output?

- While the code is commonly associated with the heated rear window relay output, it can also be triggered by issues in the rear window circuit, wiring, or the rear window defroster grid itself.

10. How can I prevent OBDII code B1C84 Ford from recurring in the future?

- To prevent the code from recurring, it is essential to address any underlying issues promptly, perform regular maintenance checks on the rear window defroster system, and ensure proper functioning of the relay and wiring connections.