一辆桑塔纳牌轿车，无论是闭合左转向灯开关还是右转向灯开关，前、后左右转向灯和转向指示灯均只亮不闪；断开转向灯开关，当闭合危险警告灯开关时，前、后左右转向灯和转向指示灯又都闪烁正常。检修时，通过查看该车转向灯电路原理图（图１），初步认定是由熔断器Ｆ１９烧毁 A Santana sedan, whether it is closed left turn signal switch or right turn signal switch, front and rear turn signal and turn indicator lights are only bright does not flash; turn off the turn signal switch, when closing the hazard warning light switch, before , Turn left and right turn signals and turn lights are flashing normal. Overhaul, by viewing the car turn signal circuit diagram (Figure 1), initially identified by the fuse F19 burned