Car GPS locator installation method

Many newcomers to the car GPS locator for the first time have no access to GPS installation, resulting in chaotic installation, resulting in incomplete product functions, or positioning accuracy is not as good as the manufacturer's description, which affects the wiring problem. What to do if you don't wire. The most comprehensive introduction below.

1. Power cord search method

The power cord of the vehicle is generally found in the wiring harness inside the decorative panel below the steering wheel and the wiring harness of the central electrical box. If necessary, it is directly connected to the positive pole of the battery. The DC voltage of the car's normal operation is 10~36V. The power cord has power when the ignition switch is in any state.

How to find it: Pull out the key, find the thickest line, use the test light (or test pencil) at one end and the other end to test on the line connector. If the test light is always on, the line is the power line.

2. ACC signal line search method

The ACC line is generally found in the wiring harness inside the decorative panel below the steering wheel and in the harness of the central electrical box. The ACC signal line is the main basis for the host to determine whether the vehicle is in the starting state.

Finding method: find the thicker wire in the ignition switch harness, use one end of the test lamp to ground the iron, and the other end to test on the wire connector: when the ignition switch is turned to “ACC” or “ON”, the test light is on; After turning off the ignition switch, the test light is off, and this connection is the ACC line.

Three. How to find the turn signal line

The turn signal line is generally found in the wiring harness inside the decorative panel below the steering wheel, the harness of the central electrical box, and the harness inside the left and right front doors. Most models are left and right, but there are also very few models divided into front, rear, left and right four lines.

Search method: Because the left and right colors of the small lamp, brake light and reversing light are the same, you can compare the color of the left and right harnesses at the front and rear combination lights, find the turning light line, see its color and size, and then in the wiring harness of the car. , find the line of the same color size. Use one end of the test lamp to ground the iron and the other end to test on the line. When turning on the left or right turn signal switch, test the line with the test light. If the test light is on and off with the turn signal, the line is turned. Light line. The other way to find the turn signal line is the same.

Note: The steering light line of some models (the model whose steering light is controlled by the module) cannot be confirmed on the wiring harness under the turn signal switch. It can only be found in the same way in the wiring harness of the central electrical box and the wiring harness in the left and right front doors. For models with front and rear turn signals that are controlled separately by the module, it is recommended to connect only the line of the rear turn signal so as not to affect the original car's line. The wiring method can only make the rear turn signal light when it is fortified and disarmed.

Four. How to find the brake line

The brake line can be found at the brake light switch above the foot brake.

How to find it: Find the brake light switch, use one end of the test light to ground the iron, and the other end to test at the switch joint. One of the wires should be a normal power, the other one has electricity after the foot brake is pressed, and the wire that has no electricity after the foot brake is released is the brake wire.

V. How to find broken oil wires

The oil line of the vehicle platform is connected in series to the positive line of the oil pump. The positive line of the oil pump is characterized by turning the ignition switch to the "ON" position. When the vehicle is not started, the line has a short period of positive power of 2 to 3 seconds, and then returns to the initial state of no electricity. After starting the engine, the line is always It is positive. The purpose of the original car design is to have a standard oil pressure in the oil pipe before starting the engine, but prevent the ignition switch from being "ON" for a long time and the vehicle is not started to burn the oil pump. The positive line of the oil pump can generally be found in the fuel tank, the left or right front door harness, and the central electrical box.

Finding method: Find a thicker line in the wire harness, use one end of the test lamp to ground the iron, and the other end to test on the wire connector. When the ignition switch is turned to the "ON" position and the vehicle is not started, the line has a short period of positive power of 2 to 3 seconds, and then returns to the initial state of no power; after starting the engine, the line is always positive, then this The root line is the positive line of the oil pump.

Six. How to find the tail gate signal line

The tailgate signal line is connected to the tailgate gate switch line, which can be found in the rear tailgate, left or right front door harness. Generally, vehicles have two types of wiring methods: positive and negative. When the tailgate is opened, the tailgate trigger line is positively charged. When the tailgate is closed, the tailgate trigger line has no power and is positively triggered. When the tailgate is opened, the tailgate trigger line is grounded. When the tailgate is closed, the tailgate trigger line is positively charged and negative triggering.

Finding method: Find the tailgate trigger line at the tailgate trigger switch, and see its color and size. Then use one end of the test lamp to ground the iron and the other end to test on the wire connector to see whether it is positive or negative. Then, in the wiring harness of the car, find the line of the same color size, use one end of the test lamp to ground the iron, and the other end to test the line on the line connector.

Seven. How to find the side door signal line

The side gate signal line is connected in parallel to the gate switch line. Can be found in the left and right front door harnesses. The original car door control switch line has two trigger methods: positive trigger and negative trigger. In addition, the original car door control switch line is divided into two types of wiring: four door control switch lines are connected together with the traditional wiring mode and module control, four door control switch lines are independently connected with the new wiring with the indoor lamp delay off function the way.

Finding method: For the traditional wiring method in which four gated switch wires are connected together, it can be directly connected to a single gate switch wire. Look at the color and size of the gate switch line at the gate switch, then find the same color line in the front door harness. Use one end of the test lamp to ground the iron and the other end to test on the wire connector: when the side door is opened, the side door trigger line is energized. When the side door is closed, the side door trigger line is not energized. When the side door is opened, the side door trigger line is grounded. When the side door is closed, the side door trigger line is energized, which is a negative trigger.

For the model controlled by the module, it is divided into two models: the old model without the original vehicle anti-theft remote control and the new model with the original vehicle anti-theft remote control. The model without the original car anti-theft remote control can be connected to the control ground of the control unit connected to the indoor light. The line is grounded through the control module when the door is open, and the indoor light is on; when the door is closed, the line is not grounded after the indoor light is turned off after about twenty seconds delay. The model with the original car anti-theft remote control should be equipped with four diodes (1N4001) connected to the four side door switch lines. The positive pole of the diode is connected to the side gate signal line of the vehicle, and the negative pole of the diode is connected to the four gate switch lines.

The voltage on the gate switch line is low. It is necessary to measure with a multimeter and a test lamp at the same time, and the result is clear.

Eight. How to find the speaker cable

The speaker cable can be found in the wiring harness inside the decorative panel under the steering wheel, the wiring harness of the central electrical box and the speaker. There are four ways to connect the original car speaker.

a Turn off the ignition switch horn can still sound, the horn relay controls the horn fire line (positive and negative trigger optional);

b Turn off the ignition switch speaker can still sound, the speaker relay controls the speaker ground (negative trigger);

c Turn on the ignition switch horn to press, the horn relay controls the horn fire line (positive trigger);

d Turn on the ignition switch horn to press the ring, the horn relay controls the horn ground