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Also there's some potential for damage to electronic components like the ECU by connecting terminals in the wrong order (i.e. not +ves first). And sparking. Lot
by scrumper 10y ago
Also there's some potential for damage to electronic components like the ECU by connecting terminals in the wrong order (i.e. not +ves first). And sparking. Lots of chance of that, more than jump leads which (unless you're incompetent) aren't going to be making and breaking contact several times while you wiggle the battery around trying to make it fit.
- MertsA 10y agoThe order in which you connect the terminals has nothing to do with preventing electrical damage. The reason why you're supposed to connect jumper cables in a particular order is for safety. When you connect just the positive, it doesn't matter if you accidentally brush the other end of the cable against the body or ground of the other car. Then the only thing left to connect is ground and if you accidentally brush the ground lead up against the body then it isn't going to matter as you're trying to connect that lead to ground. Also, the reason why you connect the last lead to a well grounded part of the engine away from the battery on the god car is because that's the only connection that creates sparks. Sparks around a bad battery are a bad idea. Batteries regularly create some Hydrogen and Oxygen gas, normally it doesn't produce that much at all and it gets vented out of the battery but with a bad battery it might have very little electrolyte left and it might have multiple cells filled with a bit of acid and a lot of explosive gas. If that spark ignites any explosive gases in the battery it will probably crack apart the plastic casing and shower you with battery acid.