汽车漏电的检查方法如下:1、观察蓄电池的观察孔颜色,检查蓄电池外观是否完好,是否存在漏液;
2、用万用表测量电瓶电压与发电量是否正常,正常电压在12伏以上,在持续放电10秒后不低于10伏;
3、拆下蓄电池负极接线,把万用表调到电流挡位置,红表笔接电瓶负极接线,黑表笔接负极接线柱,观察电流表数值,将测得的电流值与维修资料对照是否在正常范围内,若测得的电流值过大,说明汽车存在漏电故障;
4、关闭车上所有用电设备,车门、后备箱处于闭锁状态,断开电瓶上的负极,等20分钟之后将试灯一端接电瓶负极线,一端接电瓶负极柱,如果亮灯,说明用电设备和线路还在持续漏电,此时应该检查继电器和保险丝。
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