Picture of Jump a Dead Car Battery / Jump start a car.
So, here is how to jump a dead car battery.
Look at this poor and sad car. It can't start because its battery is dead, nearly dead. So, what shall we do? Lets look at the first step.

(Thank to for the paper cars in this instructable and crazyscientist_11 on Flickr for his photo of the engine bay, I used with his agreement.)
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Step 1: What you need:

Picture of What you need:
2008-07-20 IMG_2918.jpg
Here is what you need to jump start a car:

a car with a low battery to jump start
a booster car (to jump start from)
booster cables


instead of a booster car you can get a booster pack like the one on the picture beneath, which contents also a light you can use in the dark (very useful).

a pal to help (not needed but also useful and in the most cases attached to the provided booster car)

Step 2: Detrmine if battery is dead

Picture of Detrmine if battery is dead
First of all, you have to check that it is really your battery that causes the problem to start.
The easiest and fastest way is to check the clock in your car, turn the light or the wipers on. If they will work - there is another problem, but not the battery. If you turn the key an it cranks steadily - maybe it is not the battery, if it cranks slow and not round (tsh . . . tshsh instead of tsh tsh tsh tsh) or you hear no sound at all - jump start.

In our case you see the car is so sad it must have a dead battery, it can mourn about.
nine11c210 months ago

Please stop reading this persons advice. Step 2 is totally bogus. It takes a lot of power to start your car - but very little to run your car lights. In virtually EVERY case that a car battery is dead the radio, lights and horn will still work. My dad owned three gas stations from the time I as 7 so I've got 45 years experience. There is almost always enough bits of power in the battery to run the lights, but not the 12-14 amps to turn the starter. You can tell that the problem is probably the battery that when you turn the key, the car goes CLICK, CLICK, CLICK. If the lights dont work you actually more than likely have a very poor battery connection that will transmit no power rather than a dead battery. Before jumping a car - clean your cables. The advice here is TOTALLY BOGUS.

The reason you don't want to make the final connection anywhere near the battery is while you are boosting the battery it may generate some hydrogen gas, highly explosive, any spark could blow the thing up! Oh and it dosen't matter where on the car you connect the ground, current will still go into the battery.
if you are lucky it will blow up, it could make the battery just explode sending acid all over you, the hydrogen gas can singe you eyebrows(it hurts!!)
kool1zero1 year ago
My car has always made a tck-tck-tck noise if its battery is dead. Also my lighta , interior and otherwise and wipers almost always still work at least a little if not full strength but batt is too Dead to start.

In my experience if it is turning over it'll start
for the dead car side ,have the runner hooked up first connecting the ground before hot keeps it from acring from lack of a ground ,grounding to motor keeps the battery out of the intense amp flow not really jumping the battery your jumping the starter on the motor your car is much cuter than mine
Never drive with your hood raised. Not only do you have no visibility, you could damage your hood components or the hood itself.
ffsman3 years ago
I found some other important tips on boosting the battery
Karletto5555 years ago
i suggest before you turn on the engine in 'drained car' that you increase RPMs in 'booster car' on 3000 - 4000 RPMs. you should do the mentioned in order not to shock booster battery and getting help from the alternator also.

wierd idiot6 years ago
This works on most cars but on some cars you can actually destroy the EMC and the Voltage regulator just by simply jump starting the car. This is caused from the initial current surge when a fully charged battery is connected to a flat or failing battery.
Nice job. This Instructable is very detailed and has great pictures. This will sure come in handy soon..... Anyway, Great 'Ible! +1 vote and 5/5 stars.
knarx (author)  plane phanatic6 years ago
Wow, thanks for that.
agis68 knarx6 years ago
The theory is always important. I do this every time my poor car's battery is dead. But I like the cartoon cars and the whole presentation....5/5
ReCreate6 years ago
I dont know how anyone wont know how to do this
Also where did he get the car layouts or whatever from?
knarx (author)  ReCreate6 years ago
He? The paper-cars? It's mentioned in the intro.
knarx (author)  ReCreate6 years ago
Me neither.
Punkguyta6 years ago
No offense, but how is this actually an instructable when you didn't actually phyiscially go out and demonstrate this and take pictures of your own handyman workmanship. Not only does this ensure that you're using your own pictures, but it also demonstrates that you actually know what you're talking about and can use it for real life practices. Considering this is a finalist instructable (somehow), Might I ask that you update your instructable. Otherwise I like how it's laid out and it looks great otherwise.
knarx (author)  Punkguyta6 years ago
I am not offended. In fact, I am in agreement with you, which is why I didn't distribute an Instructable how to push start a car. Pictures and a video would have been necessarily for that one. But I think that in the How to jump start... - a less action but more technique way to do something - for me this seems just alright.
trogabird6 years ago
I helped my neighbor start his car several times due to weak battery but finally it would not boost for battery was totally dead. Then a few months later mi van did the same thing Next my grand daughter was using a borrowed car that did the same. Neither car would boost. All had to have new batteries to start. Have done mechanic work for 40 years and this is the first time to see this.and three cars this year, wow.
AznPanda6 years ago
at first i knew how to do it just didn't know where to connect the wires lolz
Negafen6 years ago
A few small errors as gog said technically you should connect the negative to a grounding point in the boosted cars engine bay (although to be honest I don't) If the boosted car uses more juice than the booster, you risk draining both with a direct connection If the booster has more juice than the boosted, you risk completely frying all the electricals in the boosted with a direct connection. The better solution is to start the booster car with the boosteds negative lead not connected to anything, and then while your buddy is trying to turn over the boosted car touch the lead to the battery and pull it back off as soon as the engine has started. Lower risk of messing things up, and not as annoyingly slow as the grounded approach.
gog6 years ago
I have always been instructed to connect the negative lead to the FRAME of the vehicle being jumped and not to the negative battery terminal for safety reasons so that the current is not going directly to the battery of the target vehicle.
itanium6 years ago
yea.. good one just saw on some auto show earlier today and they said to be careful before jump-starting. But if people follow just what you said, its pretty ok. +1 vote
bumpus6 years ago
Avast!, Ye have beaten me too it, but I shall make my own none-the-less!