由于各处搭铁之间存在一定的电阻， 在大电流通过时各处会形成不同的搭铁电位， 这个电位差会给汽车仪表的电阻性信号采集造成影响， 导致仪表指示不准， 甚至有时会错误报警， 使仪表不能正常工作。

 

　　为了减少搭铁对信号采集的影响，整车线束搭铁应该做到：

 

　　对接触表面进行可靠的处理， 减小接触电阻， 并制定相应的措施， 防止使用过程中产生的锈蚀、螺栓松脱等;

 

　　信号搭铁线与信号采集源的搭铁线最好连接在一起或就近连接;

 

　　功率器件与信号的搭铁线分开连接， 防止搭铁不良时产生电流沿导线反馈， 从而对信号采集产生严重的干扰。

 

　　汽车车载的电器(电子) 设备很多， 各用电设备之间互相干扰、互相影响， 在车辆上形成了一个复杂的用电环境， 汽车电器设计不能仅限于自身满足国标、企标等要求， 还要充分考虑车辆的实际用电环境， 避免受到轻微干扰时不能正常工作的情况发生。

Because there is a certain resistance between the different places, different potential will be formed at different places when a large current passes through. This potential difference will affect the acquisition of resistive signal of the automobile instrument, resulting in inaccurate indication of the instrument Even sometimes the wrong alarm, so that the instrument can not work properly. In order to reduce the influence of taping on signal acquisition, the whole car wire harness taping should be: to deal with the contact surface reliably, to reduce the contact resistance, and to formulate the corresponding measures To prevent corrosion and loosening of bolts in the process of using, the signal connecting wire and the signal collecting source's connecting wire should be connected together or near together, and the power device should be connected separately with the signal connecting wire It prevents the current feedback along the wire when the tie-in is not good, thus causing serious interference to the signal acquisition. There are a lot of electric and electronic devices on the vehicle, and each of them interfere with and influence each other, which forms a complicated environment for electric power consumption on the vehicle. The design of electric appliances on the vehicle can not be limited to meeting the requirements of national standards and Enterprise Standards It is also necessary to take full account of the vehicle's actual power environment, to avoid slight interference when the normal work of the situation.