How to Diagnose and Solve B2185 Rear Wiper Select Switch “D” Short to Ground Issues

Introduction

If you’re experiencing issues with your rear wiper select switch “D” short to ground, you’re not alone. This is a common problem that many car owners face, but it can be easily diagnosed and solved with the right tools and knowledge. In this article, we’ll walk you through the steps to diagnose and solve this issue, so you can get back to driving with a fully functional rear wiper.

Step 1: Check the Fuse

The first step in diagnosing any electrical issue in your car is to check the fuse. In this case, you’ll want to check the fuse for the rear wiper motor. Locate the fuse box in your car, which is usually located under the dashboard or in the engine compartment. Look for the fuse labeled “rear wiper motor” or something similar. If the fuse is blown, replace it with a new one and test the rear wiper. If the fuse is not blown, move on to step 2.

Step 2: Check the Wiring

If the fuse is not the issue, the next step is to check the wiring. Start by inspecting the wiring for any visible damage or wear. Look for frayed wires, loose connections, or any other signs of damage. If you find any damage, repair or replace the wiring as needed. If the wiring looks fine, move on to step 3.

Step 3: Check the Rear Wiper Select Switch

The next step is to check the rear wiper select switch. This switch is located on the dashboard and controls the rear wiper motor. Start by removing the switch from the dashboard and inspecting it for any visible damage or wear. Look for any signs of corrosion, loose connections, or other issues. If you find any damage, replace the switch with a new one. If the switch looks fine, move on to step 4.

Step 4: Check the Rear Wiper Motor

If the switch is not the issue, the next step is to check the rear wiper motor. Start by disconnecting the motor from the wiring harness and testing it with a multimeter. Set the multimeter to the resistance setting and touch the probes to the motor’s terminals. If the multimeter reads infinite resistance, the motor is likely faulty and needs to be replaced. If the multimeter reads a low resistance, the motor is likely fine and the issue is elsewhere.

Step 5: Check the Ground Connection

If the motor is not the issue, the next step is to check the ground connection. Start by locating the ground wire for the rear wiper motor and inspecting it for any visible damage or wear. Look for any signs of corrosion, loose connections, or other issues. If you find any damage, repair or replace the ground wire as needed. If the ground wire looks fine, move on to step 6.

Step 6: Check the Body Control Module

If all of the above steps have been completed and the issue still persists, the final step is to check the body control module. This module controls various electrical functions in your car, including the rear wiper motor. Start by disconnecting the module from the wiring harness and testing it with a multimeter. Set the multimeter to the resistance setting and touch the probes to the module’s terminals. If the multimeter reads infinite resistance, the module is likely faulty and needs to be replaced. If the multimeter reads a low resistance, the module is likely fine and the issue is elsewhere.

Conclusion

Diagnosing and solving B2185 Rear Wiper Select Switch “D” Short to Ground issues can be a frustrating experience, but with the right tools and knowledge, it can be easily resolved. By following the steps outlined in this article, you can quickly identify and solve the issue, so you can get back to driving with a fully functional rear wiper.

FAQs

1. Can I fix the issue myself?

Yes, with the right tools and knowledge, you can diagnose and solve this issue yourself. However, if you’re not comfortable working with electrical systems, it’s best to take your car to a professional mechanic.

2. How long does it take to diagnose and solve this issue?

The time it takes to diagnose and solve this issue depends on the severity of the problem and your level of experience. It can take anywhere from a few hours to a full day to complete the process.

3. How much does it cost to fix this issue?

The cost to fix this issue varies depending on the severity of the problem and the cost of replacement parts. It can range from a few hundred dollars to over a thousand dollars.