B0686

Symptoms

• The security light on the dashboard is flashing or stays on
• Lack of indicator response when turning on the ignition
• Inability to activate the security system

Causes

• Open or short circuit in the indicator wiring harness
• Malfunction of the indicator itself
• Problems with the security control module
• Corrosion or poor contact in connectors
• Software error in control module

How to Fix

1. Check the status of the security indicator
2. Inspect the wiring harness and check connections for corrosion or damage
3. Check the voltage and resistance in the indicator circuit
4. Scan the control module for additional errors
5. If necessary, replace the indicator or wiring harness
6. Sat show error and test

Related codes

Error B0686 by Vehicle Brand