For the stepping motor installed in the instrument aembly, (4 for each vehicle), if the motor is burnt out, the pointer will not move. In general, the repair shop recommends replacing the aembly. In fact, replacing the stepping motor can solve the problem. (if the motor fails)After getting the new motor, are you excited and looking forward to it? Now let's see how to install the new motor. The following installation proce was told by a friend who repaired the car to the shopkeeper mm. You can refer to it~The first is to disaemble the aembly and the motor. There are many technical articles on the AC network of auto parts. The shopkeeper mm said how to install it. Before installation, the four pins of the new motor should be dipped with solder paste, and then the solder paste should be hung with a soldering iron. Then, the mounting feet of the motor should be aligned with the circuit board, and then the soldering iron should be used to pre it back to the original position while ironing. In fact, the installation procedure is opposite to that of disaembly, When inserting the watch needle, just pay attention to the zero position and pre it. Remember not to pre it while rotating. After the new motor is installed, pay attention to whether it is installed. Then, power on the motor and step on the accelerator. Wait for 3 seconds. Try to avoid rotating the motor manually to avoid damaging the speed ratio of the motor. Then, check whether the instrument panel can operate normally~Note: if the motor is replaced and the problem is not solved, it is the problem of the circuit board. Parents can only consider replacing the aembly.