Which car do you put jumper cables on first?
Attach the red jumper cables first. Start by clamping one red cable to the positive side of the battery that won’t start. Then attach the other red clamp to the positive side of the working battery. Next, clamp one black cable to the negative side of the working battery.
Does jumping a car ruin your battery?
If you don’t connect the jumper cables to your car and the car you’re jump-starting in the right order, you could cause expensive electrical damage to your car – or even explode your battery.
Do I turn my car off before removing jumper cables?
Don’t let your jumper cables hang loose around the engine. They can potentially interfere with moving parts. Make sure both cars are off with the keys removed before connecting the cables.
What happens if you connect the jumper cable backwards?
Car owners may accidentally connect the jumper cables in reverse order or install the battery backward, which causes the vehicle to no longer start. The purpose of this troubleshooting guide is to help answer the following questions: Hooked battery up backward now car won’t start.
Why are jumper cables bad for your health?
Jumper cables are not designed to carry the huge surge of electrical current, and will quickly heat up to very high temperatures. This can melt the insulation on the cables and potentially expose people to direct contact with the electrical cables.
What should I do if my jumper cable is short?
Normally the only needed repair is to replace the multiple blown fuses. When you have a fuse that blows repeatedly, something has become totally shorted. Given the history, we can assume the short is not due to a bare wire or other things associated with age or mileage.
What happens when a computer cable is reversed?
All of the dozens of computers have a diode built in to protect them. Diodes are one-way valves for electrical current flow. They are installed backward so they are turned off all the time, except when battery cables or jumper cables are reversed. Reverse polarity puts the diodes in the circuit so they are turned on and act like a short circuit.