正(zheng)確連接搭火線，要(yao)先做好準備工(gong)作，再按順序連接正(zheng)負極，啟動車輛后按序拆除。

在(zai)連(lian)(lian)接搭(da)火(huo)(huo)線(xian)前(qian)，要先(xian)做好(hao)充分準備。將兩車(che)(che)(che)頭對(dui)頭停好(hao)，關(guan)閉引(yin)擎(qing)、車(che)(che)(che)上(shang)所有(you)負載(zai)，掛空擋，拉上(shang)手閘，打開(kai)發動機(ji)艙(cang)找(zhao)到電(dian)(dian)(dian)(dian)(dian)瓶，并(bing)取下蓄電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)保(bao)(bao)護蓋。同時(shi)，要確保(bao)(bao)搭(da)火(huo)(huo)線(xian)規格合適，能牢固夾(jia)(jia)(jia)住電(dian)(dian)(dian)(dian)(dian)瓶電(dian)(dian)(dian)(dian)(dian)極(ji)，且兩車(che)(che)(che)電(dian)(dian)(dian)(dian)(dian)瓶標示電(dian)(dian)(dian)(dian)(dian)壓相同。接著(zhu)開(kai)始連(lian)(lian)接搭(da)火(huo)(huo)線(xian)，先(xian)將紅色(se)搭(da)火(huo)(huo)線(xian)的一(yi)端(duan)(duan)緊緊夾(jia)(jia)(jia)在(zai)“被救(jiu)(jiu)(jiu)車(che)(che)(che)”的紅色(se)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)正極(ji)上(shang)，另一(yi)端(duan)(duan)夾(jia)(jia)(jia)在(zai)“施救(jiu)(jiu)(jiu)車(che)(che)(che)”的紅色(se)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)正極(ji)上(shang)。隨后連(lian)(lian)接黑(hei)色(se)搭(da)火(huo)(huo)線(xian)，一(yi)端(duan)(duan)夾(jia)(jia)(jia)在(zai)“被救(jiu)(jiu)(jiu)車(che)(che)(che)”黑(hei)色(se)負極(ji)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)上(shang)，另一(yi)端(duan)(duan)夾(jia)(jia)(jia)在(zai)“施救(jiu)(jiu)(jiu)車(che)(che)(che)”黑(hei)色(se)負極(ji)電(dian)(dian)(dian)(dian)(dian)池(chi)(chi)上(shang)，注意夾(jia)(jia)(jia)子要夾(jia)(jia)(jia)緊電(dian)(dian)(dian)(dian)(dian)極(ji)柱，且連(lian)(lian)接過程中避免正負極(ji)短路(lu)。

連接好搭火線(xian)后(hou)，先啟(qi)動(dong)(dong)“施(shi)救(jiu)車(che)(che)”引擎并怠(dai)速運轉(zhuan)一(yi)會(hui)兒(er)，為“被救(jiu)車(che)(che)”充(chong)電，之后(hou)再(zai)嘗試啟(qi)動(dong)(dong)“被救(jiu)車(che)(che)”。若無法啟(qi)動(dong)(dong)，需檢(jian)查金屬接觸(chu)部分。啟(qi)動(dong)(dong)后(hou)，按順序(xu)取(qu)下(xia)(xia)(xia)搭火線(xian)，先取(qu)下(xia)(xia)(xia)“被救(jiu)車(che)(che)”黑(hei)色(se)夾子(zi)，再(zai)取(qu)下(xia)(xia)(xia)“施(shi)救(jiu)車(che)(che)”黑(hei)色(se)夾子(zi)，接著(zhu)取(qu)下(xia)(xia)(xia)“施(shi)救(jiu)車(che)(che)”紅色(se)夾子(zi)，最后(hou)取(qu)下(xia)(xia)(xia)“被救(jiu)車(che)(che)”紅色(se)夾子(zi)。整個過程嚴格遵循步驟，才(cai)能安全有效地(di)完成搭火線(xian)連接。