Door, Tailgate and Hood Switches

Door, Tailgate and Hood Switches
The switches (for interior lighting) are included in the anti-theft alarm as sensors for doors and tailgate. The switches are mounted in the body, in the middle of each door and the tailgate. All door switches are connected to the alarm control module (pin 4) and the luggage compartment switch (pin 3) via the car's wiring harness. The control module then senses if a door is opened when the alarm is armed by monitoring the voltage across the switch as follows:
- When the door/tailgate is closed, the voltage between the switch and ground should be +12 V.
- The switch is grounded when the door/tailgate is opened. The voltage between the switch and ground is then 0 V. The alarm is set off.

The electronic control module senses via pin 18 whether the door is open or not and if it is prevents the alarm from being armed.

Hood Switch
The bonnet switch is located in the engine bay at the front and is included as a sensor for the bonnet. The switch is connected to the control module (pin 16).
- When the bonnet is closed, the voltage between the switch and ground should be +12 V.
- When the bonnet is opened, the switch is grounded. The voltage between the switch and ground is thus 0 V. The alarm is set off.