Basic knowledge of automobile electrician

Hehe, you ask so many questions that you can't answer them. Let me tell you the simplest one. Go to Xinhua Bookstore, where you have what you want. If you study circuit, you will have the basic knowledge of automobile circuit. Multimeter? There are pictures at the beginning of the circuit book, and how to use them. All kinds of resistance diodes diode switches can be found in books anyway. How many sensors does the engine have? Cars are different from cars. If it is an EFI vehicle, there must be at least a crankshaft position sensor. Engine knock sensor. Coolant temperature. Intake air temperature. Idle motor. Throttle position sensor. Oil pressure. This is the most basic. There are many good cars, 10, and dozens of burglar alarms. There are instructions for installing a new burglar alarm in the box. If you are an apprentice in a shop, I suggest you keep a copy of the anti-theft alarm device, which is the color of the wire and the connection place. All brands are similar, and the picture is the same. Some instructions that are difficult to install have special instructions. I suggest you find the general's anti-theft device manual one day. Which is easier to understand? Freon, please. All 4s stores have air conditioning recycling machines. Which is to be trained? The machine in our shop displays all English. No one will be trained. And if you are an apprentice, ask the master more. I can't count some of them.