How to connect the car external stereo?

The connection mode of the external car stereo is that the signal line and control line should be taken from the host computer, and the power line should be taken from the battery and equipped with safety.

Pay attention to four points when installing the power amplifier:

To connect the power supply (+12V), the battery positive electrode must be connected. You can't just find a positive wire in the car, or you will burn out the car circuit, which would be a tragedy!

The GND interface must be connected to the negative electrode, and grounding is also acceptable.

The interface among the three interfaces connecting the power line is the control line REM. Start the tester and directly test+12V! Then find the ACC control line interface wiring on the CD. If the CD player does not have a power amplifier control line, you can connect the ACC line of the key switch. Be careful not to touch the ground of the car when wiring, and carefully wrap the exposed place with electrical tape, otherwise it will lead to short circuit and burn out the machine.

When wiring, it is found that the power amplifier indicator is bright red. Please unplug and reconnect the power cord immediately until the blue light comes on. If the red light lasts for 5 minutes, the power amplifier protection device will burn out.