Wiring Harness (Short Circuit) - Test
电气故障通常由存在开路或短路的故障的电气导线造成。 如果电路的一部分接触到同一电路的另一部分，电流将离开需要流经的路径。 该情况为短路。 下述步骤将说明短路测试：
参考有关完整的电气示意图，请参考正在维修的机器的电气系统示意图。
测试是否存在短路。
- 将蓄电池断路开关钥匙和钥匙起动开关转到断开位置。
- 断开导线线束各端。
- 将校准过的数字式万用表的度盘转到 200 欧姆档并测量电阻。
- 使用一支万用表表笔接触怀疑有故障的电气导线的一个接头。
- 使用另一支万用表表笔检查相同配线线束中所有其他电气导线的连续性。 此外，还需检查整个机架或对接地的所有导线的连续性。
- 如果任何电气导线之间存在连续性，则万用表的读数应小于 5 欧姆。 导线线束的任何其他导线之间存在连续性表明这些导线之间存在短路。 必须修理或更换导线线束。
- 采用万用表测试机架或接地的连续性。 如果任何电气导线之间存在连续性，则万用表的读数应小于 5 欧姆。 如果任何导线和机架之间存在连续性，则导线和机架之间存在短路。 确定对机架短路的导线
请参考机器的电气系统确定导线是否为接地电路的一部分。 如果导线不是接地电路的一部分，则导线线束损坏，必须进行修理或更换。
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