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What happens if you connect jumper cables incorrectly?

Tried to jump a friends battery, and my idiot friend hooked up the jumper cables backwards. Smoke started coming from both our cars, so I leaped out and disconnected the cable ASAP. My car seems to be running fine. Turns out the friend's car didn't need a jump at all, there was something wrong elsewhere in the car. On Cars and Trucks, a GameFAQs message board topic titled "Hooked up jumper cables wrong, but there seems to be no damage? car that is dead(the " charging" car) then put the other black onto a metal brace of the car that is running its better to put it on an unpainted area, but if none are available, any metal brace. The car was dead and they jumped it wrong (switched the positive and negative cables on the dead car) and it sparked. Now nothing will turn on in the car at all except for the headlights. Is there a chance that they blew something big? I was told and have read that if you jump incorrectly the worst thing that.

Our Jeep was having problems turning over, so we called a tow truck driver. He connected the jumper cables incorrectly, starting a small fire on the battery box. After the fire was out, the Jeep no longer turned over.

What Happens If I Hook Up Jumper Cables Wrong

Besides damaging the electronics IN the engine, is it possible that he killer the starter? The battery isn't quite 2 years old, and works great.

More than likely the resultant issue is a fried fusible link which attaches the ignition to the starter or the starter relay which would do the same. This probably would not have killed the starter. Since you didn't put down the model or year of the Jeep, it is a little click here to help you with further diagnostic as far as where to find a fusible link or as to which relay to check.

Im not an expert, so take my advice with a grain of salt, but I think I can tackle this question:.

Possibly, but not likely. When you attach the wrong cables to the wrong nodes on a battery, it results in a very high current flow to the battery with a lower charge. The fuses in your fuse box are designed to burn out and break in the event of high surge of current in order to spare your vehicles components from frying.

Basically how a surge protected power strip works or how the old screw-in fuses that were common in houses until breakers become standard. Most of the time the fuses do their job correctly. However, on very rare occasions a fuse will weld itself together, creating a constant connection between battery and component.

What Happens If I Hook Up Jumper Cables Wrong

This actually happened to my mother in law's truck a couple weeks ago. Her vehicle wouldn't turn over, however all the lights were working so the battery still had a charge.

We figured the next logical thing to check was the starter. Oddly enough, when we replaced it, the truck started immediately after connecting the cables to the starter - the keys weren't even in the ignition. We swapped out the fuse for the starter in the fuse box and it turned over only when we cranked the keys in the ignition.

Should I drive my car to the shop with a bad ignition coil? During the process of charging the battery, you may accidentally mix up the cables and put the wrong one on the incorrect terminal. When you attach the wrong cables to the wrong nodes on a battery, it results in a very high current flow to the battery with a lower charge. Justrolledintotheshop subscribe unsubscribereaders users here now For those absolutely stupid things that you see people bring, roll, or toss into your place of business and the people that bring them in.

Check your fuses first, and if the Jeep still isn't turning over after replacing them, then start troubleshooting other damage from there. Easiest way to tell if an electrical component is damaged is with a charge tester. Touch the positive and negative nodes to the corresponding connections in the component and it will tell you if they're still allowing current to flow through properly.

You can get one at any hardware store, or swing by a mechanic or auto parts store and they will likely test out your component for free. Or you could just see if the Jeep will crank once you've replaced the battery and repaired anything that might have burned up: If one connects a strong battery to a vehicle's electrical system with reversed polarity, nearly-unlimited current will flow through the alternator until it blows a fuse or fusible link, melts a wire or diode, or does something else catastrophic.

Reverse-connecting a strong battery to a nearly-depleted battery that was What Happens If I Hook Up Jumper Cables Wrong connected properly would do likewise, though the depleted battery would pass much of the current itself likely doing significant damage to itself in the process thus reducing the amount of current flowing elsewhere.

Note that reverse-connecting two batteries of equal strength cause damage equivalent to short-circuiting one battery.

If the batteries are of unequal strength, the weaker battery will be damaged more severely from that experience than it would be from a short-circuit, though just click for source the weaker battery properly tied to its vehicle's electrical system enough current might detour through the electrical system to reduce the damage sustained by the weaker battery.

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If a hired "professional" connects a charging apparatus with reversed polarity, I would suggest that the customer should be entitled to have his vehicle inspected for electrical damage by a mechanic of his choosing, with the hired professional being responsible for the actual cost of his inspection or a typical mechanic's cost, whichever is less, along with What Happens If I Hook Up Jumper Cables Wrong cost of repairing any electrical faults that are discovered and for which the reverse connection would be the lost likely cause.

Note that such an inspection should not only try to figure out the causes behind observed problems, but even more importantly should look for damage which has no symptoms but could undermine safety.

If a wire gets hot enough to learn more here most of the insulation, such damage might have no immediate effect, but could lead to a later short circuit that might start a fire. If a wire's insulation is compromised in a fashion that might affect safety, the "professional" should pay to have it replaced, without regard for whether it's causing any immediate trouble. I believe there are too many variables to say for sure.

It would depend on how long everything was connected incorrectly, how much damage the fire did along with what circuits were involved. Circuits that are not normally related to the starting or charging systems may have been damaged by the fire or by feeding power thru the ground side of the circuit.

I would recommend you have the electrical system evaluated by either the dealer or a shop that specializes in automotive electrical systems. You may have damaged wiring that will be a problem later.

Then send the towing company the bill. If your battery is running low that's why you can't start then you have less voltage across it's nodes. When you connect another battery with the exchanged nodes, the current will flow out of your battery since it's voltage is lower and damage the battery.

Have you checked the pulse ignitor? I would try backing of http://hookupsvip.info/hook-ups/24542454f-dating-24542454g.php idle screw some more and maybe listen at the thumb throttle to hear if the micro switch is clicking. You can get one at any hardware store, or swing by a mechanic or auto parts store and they will likely test out your component for free. When he hooked it up you could hear the pop inside the store.

Assuming your battery is learn more here depleted after some time, what will be left is a What Happens If I Hook Up Jumper Cables Wrong only one left connected vice versa to your car. Not every component in your car can withstand this some parts - like radios have a protection circuitery. Fuses can only limit the currrent flow, but not it's direction. By posting your answer, you agree to the privacy policy and terms of service.

Questions Tags Users Badges Unanswered. Join them; it only takes a minute: Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top. Can hooking up jumper cables incorrectly damage the electrical system of the receiving vehicle?

Sandi 36 1 1 2. It's a Jeep Cherokee Sport. Im not an expert, so take my advice with a grain of salt, but I think I can tackle this question: Jerreck 4 8 The "professional" left the scene and us!

I don't know much about engines, but I do understand a bit of electronics, and was wondering if it was possible that he created a huge power surge in the system.

We trust the garage to get to the bottom of this, but it seems that everyone thinks it is a starter issue first-hopefully, they find something that we can hang on the first "professional". At minimum, inspect the alternator and all wires going to it. Reverse-connecting a battery could put hundreds and perhaps thousands of amps through the alternator. I would not think it very likely to have damaged the starter motor, but it's possible some vehicles use a common fusible link for the starter and alternator.

It's also possible that a starter may read more an attached flyback diode, such that an attempt to crank the car with a reverse-connected battery would result in the diode passing all the current it can get.

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That could fry the starter relay, though I'm not sure the current passed through the flyback diode would compare with the stall current for the starter motor. In any case, the objective of fusible links in some of the highest-current paths isn't to prevent things from being damaged by excessive current, but merely to reduce not article source the likelihood of them bursting into flames.

Connecting the jumper cables the wrong way might actually damage your vehicle. An alternator is typically going to have three pairs of rather beefy diodes, each of which will allow current to flow from the negative terminal to the positive terminal. I don't think the reverse voltage will get much above 1.

It's possible that some other equipment might be damaged by a reverse voltage even below 1. Sign up or log in Sign up using Google.

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