If you need to leave a pet in the car or leave the windows slightly cracked, you must disable the interior sensors to avoid false alarms. Turn the ignition OFF.
Press the "Lock" button on your vehicle’s original remote. You will usually hear two beeps (if enabled) and see the indicators flash. The LED on the dashboard will flash rapidly for about 30 seconds while the sensors stabilize, then slow down to a steady pulse.
Most false alarms on the Cobra 3865 are caused by the . Check for: Insects trapped inside the car. Strong air currents from open vents. Loose items hanging from the rearview mirror. The LED is Flashing a Pattern
Press the "Unlock" button on your remote. The system disarms instantly, usually accompanied by one beep and a flash of the indicators. 3. How to Use the Emergency PIN Code
After you disarm the alarm, the LED may flash in a specific sequence. This is a telling you why the alarm went off: 1 Flash: Door/Bonnet/Boot opened. 2 Flashes: Ultrasonic sensor triggered. 3 Flashes: Ignition attempt. 4 Flashes: Tamper/Power cut. 6. Maintenance Tips
After the fourth digit is entered correctly, the alarm will disarm. 4. Excluding Ultrasonic Sensors (Pet Mode)
