Rick's Free Auto Repair Advice

Posts Tagged: car won’t start with a jump start

Why cheap jumper cables won’t start your car

Why your car won’t start with cheap jumper cables Cheap jumper cables can’t start your car because they have too much voltage drop Wire thickness, wire metal type, and cable length all have a direct bearing on how much power the cable will transmit to the dead battery and starter. Wire gauge numbering is inverse, so the smaller the number, the thicker the wire. Thicker wire has less internal resistance so it carries more current. But current carrying capacity is also affected by jumper cable length. The longer the cable, … Read More


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