AutoCodes – Lincoln – B1C77 Lincoln

B1C77 Lincoln Code - Rear Wiper Relay Circuit

Quick Answer

The Body Control Module (BCM) monitors the Rear Wiper Relay. Common causes include Faulty Rear Wiper Relay, Rear Wiper Relay harness is open or shorted, Rear Wiper 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: B1C77 Lincoln indicates Rear Wiper Relay Circuit.
Common causes: Common causes include Faulty Rear Wiper Relay, Rear Wiper Relay harness is open or shorted, Rear Wiper 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.

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Code Popularity 788

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
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Code B1C77 Lincoln Description

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

OBDII Code B1C77 Lincoln - Rear Wiper Relay Circuit - AutoCodes.com — B1C77 Lincoln Code - Rear Wiper Relay Circuit

What does this mean?

What are the Possible Causes of the DTC B1C77 Lincoln?

Faulty Rear Wiper Relay
Rear Wiper Relay harness is open or shorted
Rear Wiper Relay circuit poor electrical connection

How to Fix the DTC B1C77 Lincoln?

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

B1C77:11 Rear Wiper Relay Circuit Short To Ground
B1C77:13 Rear Wiper Relay Circuit Open
B1C77:19 Rear Wiper Relay Circuit Current Above Threshold

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1C77 Lincoln 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 B1C77 Lincoln code?

Need more information on how to fix the B1C77 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 B1C77 Lincoln Code

1. What are common symptoms of OBDII code B1C77 in a Lincoln related to the Rear Wiper Relay Circuit?

- Common symptoms include the rear wiper not functioning properly or not turning on at all.

2. What are possible causes of OBDII code B1C77 in a Lincoln related to the Rear Wiper Relay Circuit?

- Possible causes include a faulty rear wiper relay, damaged wiring or connectors, or a malfunctioning rear wiper motor.

3. How can I diagnose the issue behind OBDII code B1C77 in a Lincoln related to the Rear Wiper Relay Circuit?

- You can diagnose the issue by checking the rear wiper relay, inspecting the wiring and connectors for any damage, and testing the rear wiper motor for proper functionality.

4. Is it safe to continue driving my Lincoln with OBDII code B1C77 related to the Rear Wiper Relay Circuit?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the rear wiper functions correctly, especially in adverse weather conditions.

5. Can I reset OBDII code B1C77 related to the Rear Wiper Relay Circuit in my Lincoln?

- You can clear the code using an OBDII scanner, but it is important to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

6. Are there any DIY repair tips for fixing OBDII code B1C77 related to the Rear Wiper Relay Circuit in a Lincoln?

- DIY repair tips may include checking and replacing the rear wiper relay, inspecting and repairing any damaged wiring, and testing the rear wiper motor for proper operation.

7. How much does it typically cost to repair OBDII code B1C77 related to the Rear Wiper Relay Circuit in a Lincoln?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the rear wiper relay, repairing wiring, or replacing the rear wiper motor, which could range from moderate to high costs.

8. Can extreme weather conditions affect the occurrence of OBDII code B1C77 related to the Rear Wiper Relay Circuit in a Lincoln?

- Extreme weather conditions such as heavy rain, snow, or temperature fluctuations can potentially exacerbate issues with the rear wiper relay circuit, leading to the triggering of this OBDII code.

9. Is it necessary to visit a dealership or a mechanic for repairing OBDII code B1C77 related to the Rear Wiper Relay Circuit in a Lincoln?

- While visiting a dealership or mechanic is recommended for accurate diagnosis and repair, if you have the necessary tools and expertise, you may be able to address the issue yourself, especially if it involves simple fixes like relay replacement.

10. How can I prevent OBDII code B1C77 related to the Rear Wiper Relay Circuit from occurring in my Lincoln in the future?

- To prevent this code from occurring again, regularly inspect and maintain the rear wiper system, ensure all connections are secure, and address any issues promptly to avoid potential failures.