If the start or the car electrical equipment is normal, there is no need to install the wire, to buy the general auto parts shop and the place where the battery is sold have the CD suspension when the start, the general car has this phenomenon, the circuit design does not need to be solved, because the car starts the motor when the power consumption is very large, so the design when the start of other electrical equipment on the car is easy Start, use too much electricity, the motor speed will drop, the car is not good to start. If you really want to change it, you can wire it from the cigarette lighter or directly from the battery, but you need to add a fuse and a switch in the middle. Will not have any effect, but should pay attention to the thing do not close to the high temperature place, in addition to the iron must be firm
Taking the wire is not good is equivalent to the negative electrode is not good this is called bad contact, for high-power will have an impact, such as when the car may feel not good before, no force feeling, or before a dozen on now to several times!