可以利用从废旧车上拆下的电流表,在电流表的两个接线端分别联接一个小鳄鱼夹。起动发动机后,拧松蓄电池负极搭头的螺母,在保持搭头和极柱接触的情况下拔高搭头,把电流表正极接线端的小鳄鱼夹夹在负极柱下部,而把另一小鳄鱼夹夹在负极搭头上,然后把负极搭头和负极柱分开,观察电 You can use the ammeter removed from the used car, ammeter in the two terminals were connected to a small alligator clip. After starting the engine, loosen the nut of the negative pole of the battery and pull it up while holding the tap and the pole in contact, clamp the small alligator clip on the positive terminal of the ammeter to the lower part of the negative pole, and put another small alligator clip In the negative take the lead, and then take the negative pole and negative pole separately, observe the electricity