Are your jumper cables smoking, melting, or searing? If so, swiftly switch the engine or power pack off and disconnect the wires in the correct order!
If you’re using another car to jump-start a dead battery, you must link it in the subsequent sequence:
- Flat battery’s positive (red) terminal
- Working battery’s positive (red) terminal
- Working battery’s negative (black) terminal
- Ground point on the car with the flat battery
You must detach the cables in the opposite order:
- Ground point on the car with the flat battery
- Working battery’s negative (black) terminal
- Working battery’s positive (red) terminal
- Flat battery’s positive (red) terminal
Smoking, melting, or sizzling jumper cables could be hazardous, doing irreversible harm to your car and possibly even you. Throw them away immediately.
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How Do You Jump Start A Car With A Flat Battery?
Jumper cables are used for jump-starting a car with a dead battery. They come with two wires with two alligator clamps, one red (positive) and one black (negative).
Red cables always attach to the positive terminal on each car. Ebony cables connect to the functioning battery’s negative terminal and a ground point on the vehicle with the dead battery.
You might have a jump-starting kit with two leads attached to a power pack. Although these are more expensive, they’re a slightly less risky way to jump-start. The danger of damaging the power pack is far less severe than the risk of damaging another car.
Method For Jump Starting A Car
Line the two up side-by-side if you’re using another car to jump-start a dead battery. However, don’t let them touch! This will interfere with the electrical current and could cause disastrous damage.
Switch both engines off and connect the two jumper cables in the “designated” order above (red, red, black, black). Next, switch on the working car’s functional engine.
Run it for a few minutes. Usually, idling is enough, but it occasionally helps to sit in the driver’s seat and increase the engine revs. This will charge the other car with a greater current.
After a while, stroll over to the car with the dead battery, leaving the other one idling. Start the engine on this inactive vehicle.
Leave both cars running for a few minutes. Next, switch both engines off and remove the jumper cables in the reverse order (black, black, red, red). Ensure the crocodile clips don’t touch each other or either automobile during this procedure.
Finally, try starting the car that has a lifeless battery. Hopefully, it’ll start the first time. If it doesn’t, there’s probably a more grave underlying issue.
What Causes Jumper Cables To Melt?
A few things could cause jumper cables to melt, but the basic cause is as follows.
They aren’t able to handle the current flowing through them. The wires inside them become physically heated, leading to melting, smoking, sparking, and overall warmth.
Here are a few things you must be wary of when using jumper cables.
What Condition Are Your Jumper Cables In?
If there are apparent signs of damage, rust, tears, or foreign bodies, your jumper cables aren’t in working condition. Repairing them is also impossible, so you should scrap them and buy a new pair.
Worn-out jumper cables cause damage to the wiring. In this situation, the electricity tries to pass through a more challenging route. This results in additional heat and ultimately melting.
To help prevent damage, store your jumper cables carefully. Don’t pile stuff on top of them in the trunk, and keep them in a container, if feasible.
Prevention is better than cure!
Do You Have The Right Jumper Cables?
Jumper cables on cars need to be made of sturdy stuff. Head to a hardware store and look for a pair created specifically for large vehicles. They’ll be perfectly safe.
Make sure it’s the suitable thickness. The wire is flimsier the higher the number is. You need to use at least 4-gauge for cars.
Mechanics are likely to use 0/1/2-gauge. These are the securest but the priciest.
If you’re trying to use cheap, low-gauge jumper cables to jump-start a dead battery, it’ll simply be too much current for the little wires to handle. They’ll overheat almost instantly.
Connecting The Terminals The Wrong Way Around
It’s crucial to connect the jumper cables to the correct terminals.
Red cables always connect the two positive terminals. These are almost always colored crimson, too, with a “+” sign on or near them.
Black cables should connect to the working battery’s negative terminal (“-“) and a ground point on the other vehicle. This should be an unpainted section of metal on or near the engine.
If you accidentally connect the positive terminal on the dead battery to the negative on the working (or vice versa), it’s known as “crossing wires.” This could be extremely hazardous.
In essence, this sends the electricity the wrong way and will reverse the polarity of the other car, making the entire electrical system unpredictable. Fuses might blow to prevent this, but they’ll also need to be replaced.
The jumper leads may start to get warm because of the crossed wires.
Jumper Leads Have Poor Connection To Either Battery
To connect the two vehicles, the jumper cables need to grip onto the battery terminals and ground point. The sharp teeth on the alligator clamps (at the ends of the jumper cables) help achieve this.
The electricity can’t flow easily when something affects the jumper cables’ connections. There’s more resistance, leading to heightened heat. Eventually, this could turn into smoking or melting.
The following things could affect a jumper cable connection:
- Dirty battery terminal
- Moisture on the battery terminal
- Not connecting to the ground point properly
- Mistaking your connection for a ground point when it isn’t
- Damaged or dirty alligator clip on the jumper cable
- Corrosion to either the jumper cable or battery terminal
What Should Good Jumper Cables Have?
You should look for jumper cables that are at least 4-gauge. 2-gauge, 1-gauge, or 0-gauge would be even superior. However, they’re more costly and probably aren’t necessary for occasional general usage.
Rubber or plastic handles are also crucial. They’re insulators, meaning they don’t allow electricity to flow easily. In the rare case of a shock, these handles absorb the electrical charge, stopping it from hurting you.
You’ll also need relatively long, well-insulated wires. Twenty feet should be more than enough for most circumstances. You’ll get away with 10 feet, too. Anything less, and you might start to struggle to line the cars up close enough.
Finally, look for jumper cables that come with a case (or that you could buy a case for). Cases simply keep them shielded from anything else in your car or trunk. They also keep it a bit neater.
What Should I Do If My Jumper Cables Start Smoking Or Melting?
If your jumper cables start smoking or melting, you must quickly switch off the engine or engines.
Carefully disconnect the cables in the correct sequence. Remove:
- The black cable from the ground point on the car with the dead battery
- The black cable from the negative terminal of the working car
- The red cable from the positive terminal of the working car
- The red terminal from the positive terminal on the car with the dead battery
Throw the jumper cables away. They aren’t secure to use for you or anyone else. You should buy a new pair before attempting to jump-start another automobile.
Are Smoking, Melting, Or Hot Jumper Cables Dangerous?
Yes.
You shouldn’t ever use jumper cables if they show signs of smoking, melting, or becoming exceptionally hot.
The primary risk is fire ignition. Batteries give off flammable gases, and your car is also filled with gasoline, and the jumper cables themselves could spark.
If they become sufficiently heated, the temperature alone could be enough to ignite your car, sending it up in flames. As an electrical fire, this would be exceptionally hazardous and needs to be extinguished using either a carbon dioxide or powder fire extinguisher (NEVER water or foam!).
The other connected car would also be in danger of the flames.
The less frequent (but still plausible) risk is an electrical overload. If jumper cables aren’t “carrying” the electricity properly, a sudden surge could severely damage the other car’s ECU. This is a costly diagnosis and repair from an automotive electrician.
Jumper Cables Smoking, Melting, Or Hot – Conclusion
Jump-starting is a vital skill to have. It might save you in a tricky situation, and it all goes smoothly 99% of the time.
However, if you’re kick-starting a car – whether it’s yours or someone else’s – and the jumper cables begin smoking and sparking, immediately switch everything off and carefully disconnect them.
The jumper cables should be promptly thrown away. The next step should be to check for any damage to the cars. Do this by starting the engine and turning every electrical appliance on, including looking for dashboard warning lights. Are there any issues?
If your jumper cables do start smoking and it causes an electrical issue, you may need to get your car towed to an auto shop. Mechanics will need to do some thorough diagnosis work and may send it to an automotive electrician. Expect to pay up to $1,000 and beyond.
In conclusion?
Buy premium jumper cables, and all this is unlikely to ever happen. When you start seeing signs of wear (which shouldn’t be for many years, provided you look after them well), discard your old ones and get a new pair.
