Explain the installation method of car alarm

Bringing up the car alarm, the car and the friends with the car are clear. The car alarm covers the GSM network digital mobile communication technology and GPS satellite positioning technology, and is a high-tech security anti-theft product. The use of mobile communication networks has completely solved the problem of distance limitation and easy to crack that ordinary anti-theft devices cannot solve. Based on the function of the ordinary anti-theft device, it also has functions such as mobile phone control, remote monitoring, and remote alarm. Make adequate protection for your car to prevent theft. Although the function is so powerful, it will have to be installed. Here is a detailed explanation of the installation of the car alarm.

Confirm that the components in the car alarm are complete, such as the whole machine, battery, certificate, and instructions.

1. Before installation, connect all the wires first. After checking the correctness of the circuit, plug the power supply, vibrator and LED light into the host respectively. The position of the main engine and the vibration sensor should avoid the high magnetic field such as the audio speaker. Before installation, you need to confirm whether the original car has a central locking, and if so, determine which trigger type it is. When installing the anti-theft device, you can wire it according to the "Central Control Lock Wiring Diagram" in "Installing the Circuit Diagram". Note: If the judgment is uncertain, connect according to the positive and negative triggers in the “Central Control Lock Wiring Diagram” to ensure that the central locking function works normally. If not, you need to install a central locking.

2. Determine the installation position. Remove the lower decorative panel of the instrument panel, and determine the installation position of the main unit, anti-cover main unit, antenna and microphone head in the vehicle (must reach the distance requirement for installation and supplementary instructions)

Pay attention to dust and water. Make a good foundation for distributing wiring.

3, check the line, wiring, line layout check line: straight out the installation circuit diagram of the required connection line distribution line: the distribution line should be as concealed and beautiful as possible, the distance between the connection point to the host should be reserved a little longer.

Wiring: Each time a line is measured, connect one to ensure that it is correct. Wiring requirements: The joints are tightly connected to avoid false connections and are wrapped with insulating tape. This process is the most important step in the entire installation process.

If the connection is wrong, the anti-theft device can not be used, and the components inside the car are burned, so that the vehicle cannot be used normally or even cause a fire.

4, the straight line method to connect this anti-theft device need to find the following lines in the car: positive, ACC, lock ON line, +12V line, turn signal line, foot brake switch line, door side contact switch line, Polar line, central locking signal line.

Positive: Pull out the key, the end of the electric pen is grounded, and the other end is tested on the lock lead. When the electric pen indicator is always on, it is positive.

ACC line: hit the lock key to the ACC, test it with the electric pen on the lock lead. When the key switch is turned to the ACC position, the electric pen will light up. When it is ON, the electric pen will also light up. When the motor is started, the electric pen light will be off (no power). This line is the ACC line.

Lock the ON line: Turn the lock key to the ON position and test it with the electric pen on the lock lead. When the key is turned ON, the test pencil has electricity. When the motor is started, the test pencil will also be on (with power). This line is the ON line.

+12V line: that is, the battery positive line (normal fire line), when the key switch is OFF or in any state, this line has a positive power supply +12V power line.

Steering light: The key must be turned ON, then use the electric pen to look up the harness under the turn signal switch (a small number of models need to be found near the fuse box), if the electric pen light turns on and off with the turn signal, This line is the turn signal line, the same reason to find another turn signal line.

Foot brake switch line: This line is generally found at the contact switch above the foot brake. One is a normal positive, and the other is a step. The line that has electricity after the foot brake is the foot brake switch line.

Door side contact switch line: Open the door of the driver's seat and close the other doors. The electric pen clip terminates the positive power inside the car, and the other end tests the harness of the door side switch. Hold the contact at the door by hand and turn it on and off. With the switch of the door edge contact, the electric pen indicator light and the illumination light inside the car are turned on and off. This line is the door edge contact line.

Polar line: that is, the iron line; the car body is connected with the battery negative pole, and the metal part of the car body is the grounding.

Central control lock line: One end of the electric pen is grounded, and the other end of the test harness (the harness is usually near the door of the driver's door) is repeatedly tested. The lock of the four doors is turned on and off with the indication of the electric pen. It is the signal line.

In the car alarm device, there is a relay, which is connected to the normally closed contact, which can control the external circuit. In fact, it is a switch controlled by the anti-theft device. It can disconnect the start line or "ON" line as needed, or disconnect The oil circuit is to find the above line, disconnect the line, and then connect the "switch" of the anti-theft device in series, so that it is controlled by the anti-theft device, such as the start line control you connect, then the anti-theft device When the alarm is not on, the line remains on, you can start the car normally. When you illegally enter the forced start car, the anti-theft device starts protection and disconnects the switch, so you can't start the car (because the start line is disconnected, the car does not catch fire) ), the same reason, if you disconnect the "ON" line, then you can not start the car (because the "ON" line is disconnected, the car only starts the motor to rotate, will not start), there is also a situation is to disconnect the oil circuit The phenomenon is the same as the disconnection of the "ON" line. Since the oil passage is broken, the car does not supply oil, and naturally it cannot be started.