How to Diagnose and Solve B1690 Autolamp Delay Circuit Open Issues

Introduction

If you’re experiencing issues with your car’s autolamp delay circuit, you may have encountered the B1690 error code. This code indicates that there is an open circuit in the autolamp delay circuit, which can cause your car’s lights to malfunction. In this article, we’ll provide you with step-by-step instructions on how to diagnose and solve this issue.

Step 1: Check the Autolamp Delay Relay

The first step in diagnosing the B1690 error code is to check the autolamp delay relay. This relay is responsible for controlling the autolamp delay circuit, and if it’s faulty, it can cause the circuit to malfunction.

To check the relay, start by locating it in your car’s fuse box. Once you’ve found it, remove it from the fuse box and inspect it for any signs of damage or wear. If the relay looks damaged, you’ll need to replace it.

If the relay looks fine, you can test it using a multimeter. Set the multimeter to the continuity setting and touch the probes to the relay’s terminals. If the multimeter beeps, the relay is working correctly. If it doesn’t beep, you’ll need to replace the relay.

Step 2: Check the Autolamp Delay Circuit Wiring

If the autolamp delay relay is working correctly, the next step is to check the wiring in the autolamp delay circuit. Start by inspecting the wiring for any signs of damage or wear. If you notice any damage, you’ll need to repair or replace the wiring.

If the wiring looks fine, you can test it using a multimeter. Set the multimeter to the continuity setting and touch the probes to the wiring’s terminals. If the multimeter beeps, the wiring is working correctly. If it doesn’t beep, you’ll need to repair or replace the wiring.

Step 3: Check the Autolamp Delay Circuit Fuse

If the autolamp delay relay and wiring are working correctly, the next step is to check the autolamp delay circuit fuse. This fuse is responsible for protecting the circuit from electrical surges and can blow if there is a fault in the circuit.

To check the fuse, locate it in your car’s fuse box and inspect it for any signs of damage or wear. If the fuse looks damaged, you’ll need to replace it.

If the fuse looks fine, you can test it using a multimeter. Set the multimeter to the continuity setting and touch the probes to the fuse’s terminals. If the multimeter beeps, the fuse is working correctly. If it doesn’t beep, you’ll need to replace the fuse.

Step 4: Check the Autolamp Delay Circuit Ground

If the autolamp delay relay, wiring, and fuse are all working correctly, the next step is to check the autolamp delay circuit ground. The ground is responsible for completing the circuit and can cause issues if it’s faulty.

To check the ground, start by locating it in your car’s wiring diagram. Once you’ve found it, inspect the wiring for any signs of damage or wear. If you notice any damage, you’ll need to repair or replace the wiring.

If the wiring looks fine, you can test the ground using a multimeter. Set the multimeter to the continuity setting and touch the probes to the ground’s terminals. If the multimeter beeps, the ground is working correctly. If it doesn’t beep, you’ll need to repair or replace the ground.

Conclusion

If you’re experiencing issues with your car’s autolamp delay circuit, the B1690 error code may be to blame. By following the steps outlined in this article, you can diagnose and solve this issue, ensuring that your car’s lights function correctly.

FAQs

1. Can I drive my car with the B1690 error code?

It’s not recommended to drive your car with the B1690 error code, as it can cause your car’s lights to malfunction. It’s best to diagnose and solve the issue before driving your car.

2. How much does it cost to fix the B1690 error code?

The cost of fixing the B1690 error code can vary depending on the cause of the issue. If it’s a simple fix, such as replacing a fuse, it may only cost a few dollars. If it’s a more complex issue, such as replacing wiring or a relay, it can cost several hundred dollars.

3. Can I fix the B1690 error code myself?

If you have experience working with cars and electrical systems, you may be able to fix the B1690 error code yourself. However, if you’re not confident in your abilities, it’s best to take your car to a professional mechanic.