有台北京BJ121A轻型货车,电流表指针不指示,其它电器一切正常,蓄电池长期作用也不亏电。 根据故障现象,从仪表盘上拆下电流表在TQD—2型汽车电器万能试验台上试验,一切正常(如没有试验台,也可在车上用一根火线接在电流表的“一”接线柱上,电流表的“+”接线柱接试灯上的一根导线,试灯上的另一根导线接铁,试灯亮,电流表放电,说明电流表正常)。接着又用试灯分别检查 A Beijing BJ121A light trucks, ammeter pointer does not indicate that all other electrical appliances are normal, long-term effect of the battery is not a loss of electricity. According to the fault phenomenon, remove the ammeter from the dashboard TQD-2-type automotive electrical universal test bench test, everything is normal (if there is no test bench, but also in the car with a hot wire connected to the ammeter “a” terminal On the ammeter “+” terminal connected to a test light on the wire, test light on the other wire access iron, the test light is on, ammeter discharge, indicating ammeter normal). Then use test lights were checked