行车记录仪ACC、B+常电、GND地线的区别和接法The difference and connection method b

元始天君

行车记录仪ACC、B+常电、GND地线的区别和接法

行车记录仪一般有三条线，红色ACC用于接正极，黑色GND接负极，黄色B+接常电（也叫长电）。

行车记录只需接红色ACC正极及黑色GND负极两条线，当汽车开启电源后，记录仪开始工作，汽车熄火并取走钥匙后，记录仪停止工作。

如果需要停车时监控，就需要第三条线，黄色B+线，接到停车时也有电的供电点上。下面分别说明接法。

The difference and connection method between the ACC, B+normally charged, and GND ground wires of the driving recorder

A dash cam generally has three wires, with a red ACC connected to the positive pole, a black GND connected to the negative pole, and a yellow B+connected to a constant current (also known as a long current).
The driving record only needs to be connected to two wires: the red ACC positive pole and the black GND negative pole. When the car is powered on, the recorder starts working. After the car is turned off and the key is removed, the recorder stops working.
If monitoring during parking is required, a third line, the yellow B+line, is needed to connect to the power supply point that also has electricity during parking. The following will explain the connection methods separately.

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点烟器、阅读灯电源可接ACC正极

但是要注意有些车型的点烟器是汽车启动后才有电，有些车型则长期带电。

如果是长期带电点烟器最好不要接ACC，因为这样的话你熄火离开后，记录仪仍然会继续工作。

阅读灯电源要接在灯开关的前面，如果接后面阅读灯关闭时，记录仪也会关闭。

点烟器接电可能需要购买一拖二接口，留一接口日常用电。阅读灯取电需专业工具量取接电位置，有些车型可能需要电路板上焊接。

The power supply of the cigarette lighter and reading light can be connected to the ACC positive pole

However, it should be noted that some car models have their cigarette lighters powered on only after the car has started, while others have been powered on for a long time.

If the cigarette lighter is charged for a long time, it is best not to connect it to ACC, because if you turn off the engine and leave, the recorder will still continue to work.

The power supply of the reading light should be connected to the front of the light switch. If it is connected to the back, the recorder will also turn off when the reading light is turned off.

The cigarette lighter may need to purchase a one to two interface to connect to electricity, leaving one interface for daily use. Reading lights require professional tools to measure the power connection position, and some models may require soldering on the circuit board.

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在主驾驶方向盘下的保险盒寻找ACC正极

汽车保险盒附近通常有一个表格，说明各个保险和继电器的作用，可以在这里寻找ACC正极和B+常电。

ACC与钥匙或汽车启动相关，钥匙打开后或汽车启动后带电的保险位，通常都可以作为ACC正极使用。有些低配车保险盒预留有高配车的全景保险，应优先选择这种预留接线位。

利用万用表检测保险盒的方法寻找ACC接线点

若表格说明不详细，可以用万用表逐个检测保险的方式去寻找，当钥匙开启时带电关闭时不带电的保险位，都可以作为ACC的备选，最终可能不止一个保险位，要谨慎测试选用，这一点需要有一定的电路常识和基础，或向专业人士请教。

ACC正极只用于行车时记录，如果有接停车监控的，这条线的通断会告诉记录仪现在是正常行车，还是停车监控，因此这条线最好不要接常电

Search for the ACC positive pole in the fuse box under the driver's steering wheel

There is usually a table near the car fuse box that explains the functions of each fuse and relay. You can find the ACC positive pole and B+constant current here.

ACC is related to the key or car start, and the electrically charged safety position after the key is opened or the car starts can usually be used as the positive pole of ACC. Some low-end car fuse boxes are reserved with panoramic insurance for high-end cars, and this reserved wiring position should be prioritized.

Using a multimeter to detect the fuse box and find the ACC wiring points

If the table description is not detailed, you can use a multimeter to check the insurance one by one to find. When the key is turned on and off with power, the insurance positions that are not with power can be used as backup for ACC. In the end, there may be more than one insurance position, so it is necessary to carefully test and choose. This requires a certain level of circuit knowledge and foundation, or consult with professionals.

The ACC positive pole is only used for recording during driving. If there is a connection to parking monitoring, the continuity of this line will tell the recorder whether it is currently driving normally or parking monitoring. Therefore, it is best not to connect this line to a constant current

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在主驾驶方向盘下的保险盒寻找B+常电正极

B+常电的接线位，要求在停车时仍能供电。因此只要找出停车时仍然带电的接 所线位就可以了。

这条线的接线位，除了参照保险盒说明书或表格外，同样可以用万用表检测出来。只要在汽车钥匙关闭全车停电的情况下，或无匙启动的汽车，在熄火并关闭电源的情况下，仍然带电的保险位或其它接线位，都可以作为B+常电的取电位。



注意，接B+常电停车时仍会继续录像监控，所以它只适合带有低压保护的记录仪使用，否则易重则会导致电瓶失电损坏，轻则汽车无法启动。

Find the B+normally charged positive pole in the fuse box under the driver's steering wheel

The connection point for B+constant power is required to be able to provide power even when parking. Therefore, as long as you find the connection line position that is still live when parking, it is enough.

The wiring position of this line can also be detected using a multimeter, in addition to referring to the instructions or tables of the fuse box. As long as the car key is turned off and the entire vehicle is powered off, or a keyless car is turned off and the power is turned off, the live safety position or other wiring position can be used as a B+constant voltage tap.



Note that when parking with B+constant power, the recording and monitoring will still continue, so it is only suitable for use with recorders with low voltage protection. Otherwise, it may cause the battery to lose power and damage, and in light cases, the car cannot start.

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黑色GND接地线的接线



汽车上预留有很多接地螺丝，一般保险盒附件就有一个，基本上全车金属部分都可以作为接地，但是最好是寻找车上原有的接地螺丝，这样一来连接起来比较方便，二来导电接触性能也较好。

Wiring of black GND grounding wire



There are many grounding screws reserved on the car, usually one is attached to the fuse box. Basically, all metal parts of the car can be used as grounding, but it is best to find the original grounding screw on the car, which is more convenient to connect and also has good conductivity and contact performance.

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总结：
1
红色ACC点火线，熄火后断电，或给停车监控发信号

2
B+黄色常电线，熄火后不断电，用于停车监控，需带低压保护以防电瓶损耗过度。

3
GND黑色地线，可接车内任意地线螺丝位。


注意事项
不同品牌记录仪的线颜色或用途可能略有区别，要看说明书确认，以免出错。
ACC和B+常电要带保险和降压线，避免电流过大损坏记录仪。
汽车取电需谨慎操作，不懂的请向专业人士请教，切勿胡乱尝试。

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Summary:
1 Red ACC ignition wire, power off after stalling, or signal to parking monitoring

2. B+yellow constant wire, does not cut off power after turning off, used for parking monitoring, needs to be equipped with low-voltage protection to prevent excessive battery loss.

3. GND black ground wire, can be connected to any screw position of the ground wire inside the car.

END
matters needing attention
The color or purpose of the cables of different brands of recorders may vary slightly. Please refer to the manual for confirmation to avoid errors.
ACC and B+should be equipped with fuses and step-down wires to prevent excessive current from damaging the recorder.
Car power should be operated with caution. If you do not understand, please consult a professional and do not attempt to do so recklessly.