how-to

How to jump start a car without wrecking either one

Two people, one set of cables, and a cold parking lot. This is the part that goes wrong when everyone is in a hurry.

Short answer

Park the cars close without touching, both off. Connect red to the dead positive, red to the good positive, black to the good negative, then black to bare metal on the dead car’s engine block — not the dead negative terminal. Start the good car, wait a minute, then start the dead one. Remove in reverse order.

The facts, in one place

Last black clip goes to bare metal, not the dead negative terminal.
Never let the clamps touch each other while anything is connected.
A visibly cracked, leaking, or frozen battery does not get jumped.
If it will not start after two tries, it is a tow or a new battery.

When not to jump it at all

If the battery case is cracked, leaking, bulging, or visibly frozen, walk away and call a service. A frozen battery can rupture. If you smell rotten eggs, that is the battery venting and it is not a smell to work through.

If the car cranks strongly but will not catch, the battery is probably not the problem. Repeated attempts will just drain the good car.

Doing it at minus twenty

Cold makes everything slower and clumsier. Wear gloves you can still work in, keep the cable ends off the ground where they freeze stiff, and do not stand between the cars. If either of you is losing feeling in your hands, stop and call roadside assistance — a jump is not worth frostbite.

Asking for one on Help Me

Pick a public, plowed, lit lot. Say where you are in terms someone can find without a map — the store entrance, the lot number, the row. Approved helpers nearby can be offered it, and the first eligible one to accept gets it. Nobody is obligated, and nobody gets paid.

Step by step

1. Position and shut off
Park close enough for cables to reach without the vehicles touching. Both engines off, both in park, parking brakes on.
2. Red to dead positive
Clamp one red clip to the positive terminal of the dead battery. Positive is marked with a plus and usually a red cover.
3. Red to good positive
Clamp the other red clip to the positive terminal of the working battery.
4. Black to good negative
Clamp one black clip to the negative terminal of the working battery.
5. Black to bare metal
Clamp the last black clip to unpainted metal on the dead car’s engine block or frame, away from the battery. This is the step people skip, and it is the one that keeps a spark away from battery gases.
6. Start and wait
Start the working car and let it run a minute or two. Then try the dead car. If it does not turn over after a couple of tries, stop — something else is wrong.
7. Disconnect in reverse
Remove the clips in the exact reverse order, then let the revived car run or drive for a while before shutting it off.

Questions people actually ask

Does the order really matter?

Yes. The final black clip on bare metal keeps the spark away from hydrogen venting off the battery. It is the whole reason for the sequence.

How long should I drive afterward?

Long enough for the alternator to put something back — a highway loop beats idling in a lot. If it dies again the next morning, the battery is finished.

Help Me is a community app for adults in Fargo–Moorhead. It is not a K–12 student program, not a youth chat, and not campus police.