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When trying to jump start my Volvo XC-60, I came across a very unexpected problem.

I tried to use our 2nd vehicle, a 2010 Ford Escape, as the assisting car to jump start mine. But when I looked at the engine compartment of the Escape, I found that the battery is positioned in such a way that the negative terminal is completely inaccessible and there is no physical method that I can find to connect jumper leads to that battery.

I was always taught to connect the jumper cables as follows:

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With + to +, and - on the assisting vehicle to a good ground point on the car with the dead battery.

But given that the negative terminal is not accessible, I did not want to try it. I eventually borrowed a friends car to jump start mine, but now I'm left wondering, is it possible to use the Ford Escape to jump start another car by hooking the negative lead to another location?

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1 Answer 1

Any ground (earth) location will work. On my '06 Silverado, there are places to hook the jumpers which are away from the battery. You don't even hook the jumpers to the battery no matter which way you're going (whether jumping or being jumped). As long as you have a good ground location, you're golden. Given two vehicles with alternative connection points (places away from the battery), you could possibly have all four locations away from the battery and still be good. This may not be ideal, but it will still work.

As an aside, I was always taught the vehicle doing the jumping should be the last vehicle to be connected, and that the negative on it should be the one which is connected away from the battery. Either way you go, the one which is done last should be the one connected away from the battery. This is because when the last connection is made, the inevitable spark will occur. Batteries release hydrogen gas which can ignite from the spark. By placing the last connection away from the battery, you severely limit the chances of an accidental explosion (think of flames and battery acid going everywhere ... not a pretty thought).

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