AutoCodes – RAM – B18B7 RAM

B18B7 RAM Code - Master Switch Rear Left Window Switch

Quick Answer

Whenever the Door Module detects a Rear Left Window signal from the master power window switch, for over 30 seconds, this Diagnostic Trouble Code (DTC) will set. Common causes include Faulty Rear Left Window Switch, Rear Left Window Switch harness is open or shorted, Rear Left 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: B18B7 RAM indicates Master Switch Rear Left Window Switch.
Common causes: Common causes include Faulty Rear Left Window Switch, Rear Left Window Switch harness is open or shorted, Rear Left 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.

Save to My Repairs My Repairs

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

Code Popularity 573

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 Jul 26, 2019

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

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

Code B18B7 RAM Description

Whenever the Door Module detects a Rear Left Window signal from the master power window switch, for over 30 seconds, this Diagnostic Trouble Code (DTC) will set.

OBDII Code B18B7 RAM - Master Switch Rear Left Window Switch - AutoCodes.com — B18B7 RAM Code - Master Switch Rear Left Window Switch

What does this mean?

What are the Possible Causes of the DTC B18B7 RAM?

Faulty Rear Left Window Switch
Rear Left Window Switch harness is open or shorted
Rear Left Window Switch circuit poor electrical connection

How to Fix the DTC B18B7 RAM?

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 B18B7 RAM 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 B18B7 RAM code?

Need more information on how to fix the B18B7 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B18B7 RAM 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 B18B7 RAM Code

1. What does the OBDII code B18B7 RAM mean for the Master Switch Rear Left Window Switch?

The code B18B7 RAM indicates a malfunction in the Master Switch Rear Left Window Switch circuit.

2. What are common symptoms of OBDII code B18B7 RAM?

Common symptoms include the rear left window being unable to roll up or down using the master switch, or erratic behavior of the window when using the switch.

3. What are possible causes of OBDII code B18B7 RAM?

Possible causes include a faulty master switch, damaged wiring or connectors in the circuit, or a malfunction in the window motor or regulator.

4. How can I diagnose the issue related to OBDII code B18B7 RAM?

Diagnosing the problem involves checking the wiring and connectors for damage, testing the master switch for proper functionality, and inspecting the window motor and regulator for any issues.

5. Can I repair OBDII code B18B7 RAM myself?

If you have experience with automotive electrical systems, you may be able to repair the issue yourself by replacing the faulty master switch, repairing damaged wiring, or addressing any other identified problems in the circuit.

6. Is it safe to continue driving with OBDII code B18B7 RAM present?

While the vehicle should still be safe to drive, it is recommended to address the issue promptly to ensure proper operation of the rear left window and prevent any further electrical problems.

7. How much does it typically cost to repair OBDII code B18B7 RAM?

The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the master switch, repairing wiring, or addressing other component failures. Costs can range from relatively inexpensive for DIY repairs to higher costs for professional services.

8. Can resetting the OBDII system clear the B18B7 RAM code?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the B18B7 RAM code is not addressed, the code is likely to reappear once the problem is detected again.

9. Are there any preventive measures to avoid OBDII code B18B7 RAM in the future?

Regularly checking the functionality of all window switches and addressing any issues promptly can help prevent the occurrence of the B18B7 RAM code in the future.

10. How do I know if the OBDII code B18B7 RAM has been successfully resolved?

After repairing the issue related to the B18B7 RAM code, you can use an OBDII scanner to clear the code and then test the rear left window switch to ensure proper functionality. If the window operates correctly without triggering the code, the problem is likely resolved.