Some time ago, I had a rest at home for seven or eight days, and it was really uncomfortable, but I still took a taxi from three to five buildings in order to recharge the battery and avoid losing power in the battery for a long time. In fact, the battery also needs to be maintained regularly, and charging the battery regularly is the best way to maintain it. Later, when I was almost good, my relatives called and said that the battery was running out of power and I couldn’t get a taxi, and the car was parked in the neighborhood for about a week, and then I couldn’t get a taxi. Originally, I wanted to ask my relatives to call the insurance company, because many insurance companies gave free assistance, but later I found out that the relatives only bought traffic insurance, so the insurance company did not have rescue services, so I drove there later and paralleled the relatives’ cars with the batteries in my car. Because I had attended Yifeng’s car maintenance class before, I knew that when the battery lost power, the cars were connected in parallel, with the positive pole facing the positive pole and the negative pole facing the negative pole, but I never thought that my relatives might be careless. I originally thought such a simple thing he also knew, did not expect that he actually connected the battery cable upside down, and directly sparked, and later even connected the battery cable correctly. Taking a taxi is also in gear without any response, and the electronic handbrake can not be untied, and there are a lot of fault lights on the meter. Later, when I asked the nearby repair shop to come to the rescue, the master came to check for half an hour, but there was no clue, saying that the engine computer board might have been burned, but there was no way to call Yifeng after sale. Later, there came a rescue car after the sale of Yifeng, and a master checked and said that he had to tow the car back, because a large integrated fuse was fused, and this thing was not easy to disassemble and needed to be towed back. In addition, this part generally does not need to be replaced, so they have to place an order when there is no stock in the warehouse. It seems that the professional still checks the fault more quickly. The integrated insurance is installed in the safe box behind the left headlamp. No wonder the master of the repair shop did not pay attention to this insurance after measuring the watch for a long time. Later, the master after the sale of Yifeng pointed out to us that it was indeed the big integrated fuse that fused, and it would be difficult to notice this part if we did not look carefully. It seems that people are very good at repairing Toyota cars and are more professional. Because there were no accessories at that time, a rescue trailer came and loaded the relative’s car and towed it back to Yifeng after-sale workshop. The accessories were not expensive, but they had to wait. After waiting for three days, the accessories finally arrived. The after-sale side called my relatives and said that the accessories had arrived, because he didn’t have a car, so I drove him there again. To tell you the truth, this integrated fuse is really not easy to replace. It took the master of the workshop nearly two hours to replace it. The main reason is that this big fuse is not directly inserted in the safe box, but is fixed in it with screws and is stuck layer by layer. It takes great patience and care to peel off layer by layer before you can replace this integrated fuse. We waited at the scene for about two hours, and then the integrated fuse was finally changed. after taking a taxi, the vehicle function returned to normal, although there were still some fault lights on the instrument. but the master pushed over a Toyota-only diagnostic computer and fixed the fault on the car. Through this matter, I conclude that simple things such as battery feeding in parallel must be taken more seriously, such as the positive pole is a red lid, the positive pole symbol below must be determined, and the negative pole head will be thinner and there will be negative pole symbols. These must not be mistaken, or it will really cause very serious consequences.