1. First simple, then complex. Solve the problems that are easy to solve first, and then solve the problems with greater difficulties. Don't get stuck in a difficult problem at the beginning.

2、先外后内。优先对暴露在外面，易接触、易拆卸的部件进行检测，然后再对不易接触和拆卸的部件进行检测。

2. First outside, then inside. Firstly, the exposed, easily accessible and easily disassembled parts shall be inspected, and then the parts that are not easy to be touched and disassembled shall be inspected.

3、先熟后生。对常见的搅拌车故障部位行检查，往往可迅速确定故障部位，省时省力。

3. Ripen first, then raw. The common fault parts of the mixer truck are checked first, which can quickly determine the fault location and save time and effort.

4、先静后动。这里的“静”是指不启动的静止状态；“动”是指启动发动机后的工作状态。不要盲目启动汽车，应先做必要的检查和电气性能测试（看有无漏电、打火或短路处），然后再启动工作，可保证汽车的。

4. First static, then dynamic. Here, "static" refers to the static state without starting, while "dynamic" refers to the working state after starting the engine. Do not start the car blindly. Do necessary safety inspection and electrical performance test (to see if there is leakage, ignition or short circuit), and then start the work to ensure the safety of the car.

5、先电源后负载。电源故障是常见的故障之一，因此电气部分出故障后一般应检查电源部分。

5. Power supply before load. Power failure is one of the most common faults, so the power supply should be checked first after the electrical part fails.

6、先一般后特殊。先检查一般故障，再查特殊故障。

6. First general, then special. First check the general fault, then check the special fault.

7、先公用后专用。要先公共性的问题和各部分所共有的问题，后个别性和专用电路的问题。

7. Public use first and then private use. We should first solve the problems of commonality and common problems of all parts, and then solve the problems of individual and special circuits.

8、分段检查。分段检查搅拌车是指在故障诊断中，对怀疑有搅拌车故障的系统，逐段进行检测分析，直查找到搅拌车故障点。

8. Section inspection. Section inspection of mixer is to detect and analyze the system suspected to have mixer fault section by section in fault diagnosis until the trouble point of mixer is found.