What would happen if you connected your battery backwards? - New Tiburon Forum : Hyundai Tiburon Forums
 
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#1 Old 02-02-2009, 10:51 PM
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What would happen if you connected your battery backwards?

Yes, dumb question but I was just curious as to what would actually happened if you connected your battery backwards meaning you connected the positive with the connection requiring a negative post and vice-versa??

Edit: since this has turned into a joke since noone has an educated response or idea of what would happen, I raised this question for one reason. In attempt to sell my red top battery I was asked if the negative and positive posts are backwards on the redtop... that got me thinking as to WHAT IF someone actually installed their battery backwards obviously not realizing they did so... what would happen


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#2 Old 02-02-2009, 10:53 PM
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Re: What would happen if you connected your battery backwards?

I would think it would fry the computer.

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#3 Old 02-02-2009, 11:03 PM
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Re: What would happen if you connected your battery backwards?

if you did that, then you would have completely wasted a good battery. so yeah DONT DO IT! lol

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#4 Old 02-02-2009, 11:10 PM
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Re: What would happen if you connected your battery backwards?

I guess I should have posted this in the tech area... I guess thats just the NT attitude... if you dont know the answer or have an educated response, you make a joke lol


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#5 Old 02-02-2009, 11:11 PM
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Re: What would happen if you connected your battery backwards?

wow. i see a lot of infractions being handed out in this thread.

not one useful post?

pretty sure your battery will be screwed and possibly other electrical components.


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#6 Old 02-02-2009, 11:15 PM
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Re: What would happen if you connected your battery backwards?

Okay seriously, I don't think it would even do anything, but I have never tried it, nor do I know anyone who has. But I guess there is a chance you could blow all of your fuses, cuz that's what happens when you cross a positive wire with a negative wire.

Why do you ask? Did you accidentally do this? Or are you thinking of doing it? And if so........WHY?


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#7 Old 02-02-2009, 11:18 PM
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Re: What would happen if you connected your battery backwards?

your battery would be fine, though your electronics might suffer. You would be running the power through the ground so there would be no fuses in line to protect anything.

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#8 Old 02-02-2009, 11:19 PM
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Re: What would happen if you connected your battery backwards?

edit To The First Post!!! I Guess I Have To Explain Myself More To Make This A Bit More Serious Thread


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#9 Old 02-02-2009, 11:20 PM
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Re: What would happen if you connected your battery backwards?

Okay back on topic if you do this you can basiaclly blow fuses and anything that has to do with semiconductors or transistors. Doing this can also screw up anything that has to do with a the battery. But dont listen to Im just a post whore


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#10 Old 02-02-2009, 11:22 PM
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Re: What would happen if you connected your battery backwards?

It should just blow the main fuse of the car, before it would do any damage to all your electrical components.

I did that a long time ago to my lawnmower and it shorted out everything. Cooked the wires, smoke was everywhere. The new battery I bought was a different brand and the terminals were backwards compared to the old one I took out. Thats what I got for not double checking.

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#11 Old 02-03-2009, 12:08 AM
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Re: What would happen if you connected your battery backwards?

* sigh* What ever happened to the days on a car forum where no question was a dum question when some one was looking to educa there selves. You all should be ashamed. Sorry ajd, Hooking up the battery in revers polarity could potentioaly be very harmful and very dangerouse. It is possible that the reverse surge could cause the battery to explode, most battery cases are built very durably, but it could still explode, with that a power surge large enough could destroy all the electronic components in your vehicle, kinda like an ungrounded house getting hit by lightning and all your home electronics not being hooked up to a surge protecter. You could hope the fuse box would protect it but it may not.

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#12 Old 02-03-2009, 12:12 AM
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Re: What would happen if you connected your battery backwards?

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Originally Posted by jprophecy View Post
* sigh* What ever happened to the days on a car forum where no question was a dum question when some one was looking to educa there selves. You all should be ashamed. Sorry ajd, Hooking up the battery in revers polarity could potentioaly be very harmful and very dangerouse. It is possible that the reverse surge could cause the battery to explode, most battery cases are built very durably, but it could still explode, with that a power surge large enough could destroy all the electronic components in your vehicle, kinda like an ungrounded house getting hit by lightning and all your home electronics not being hooked up to a surge protecter. You could hope the fuse box would protect it but it may not.
thats the kind of response I was looking for I know it seems kind of like an obvious question and obv. the result probably wouldnt be very good but I was just curious as to what would be expected if this happened or what the risks were


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#13 Old 02-03-2009, 12:19 AM
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Re: What would happen if you connected your battery backwards?

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Originally Posted by AJD 4 ND View Post
thats the kind of response I was looking for I know it seems kind of like an obvious question and obv. the result probably wouldnt be very good but I was just curious as to what would be expected if this happened or what the risks were
Yea well the result shouldnt be that being that the purpose of a car forum is so we can all help educate each other about anything to do with cars no matter how strange or silly the question may seem, people seem to have lost sight of that. But Im glad I can be of help to any one here on the forum.

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#14 Old 02-03-2009, 12:29 AM
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Re: What would happen if you connected your battery backwards?

Thread cleaned up, although I may have made it a little late.

Anyway, to those of you who posted useless crap consider this a warning. I'm getting tired of seeing this kind of stuff going on. Next time I see something from one of you making fun of someones question you will get an infraction for useless posting. If it's your post count your worried about we can reset that too if you'd like.

To the OP....I apologize man, I guess some people can't try and answer a question or leave the thread alone if they don't know.


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#15 Old 02-03-2009, 12:54 AM
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Re: What would happen if you connected your battery backwards?

The battery should be OK, but some of your electronics would be fried. I doubt there will be a low enough of a resistance with the terminals backwards to cause the battery to explode. Even if there were to be a low enough resistance for the battery to explode, the fuses would pop before the battery could reach that kind of critical point.


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#16 Old 02-03-2009, 12:59 AM
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Re: What would happen if you connected your battery backwards?

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The battery should be OK, but some of your electronics would be fried. I doubt there will be a low enough of a resistance with the terminals backwards to cause the battery to explode. Even if there were to be a low enough resistance for the battery to explode, the fuses would pop before the battery could reach that kind of critical point.
Believe it or not It can Ive seen it happen before, and battery acid is nasty!

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#17 Old 02-03-2009, 01:12 AM
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Re: What would happen if you connected your battery backwards?

time to come up with a story and email mythbusters

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#18 Old 02-03-2009, 01:19 AM
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Re: What would happen if you connected your battery backwards?

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time to come up with a story and email mythbusters
LOL yea how bout it, actualy though ive seen to diferent senarios, One was a new battery instal, got hooked up backwards baterry cracked in half, the other was a jump where the cables got hooked wrong, the negetive termanal and wire melted right off, and again the battery cracked open.

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#19 Old 02-03-2009, 02:02 AM
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Re: What would happen if you connected your battery backwards?

haha well yeah if you hook up a running car with jumper cables backwards it forces current the opposite direction into the weaker battery. Naturally it would go supernova in that situation.

I second that mythbusters idea, i don't have any extra beaters I could test the explosion theory so let's leave it up to them


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#20 Old 02-03-2009, 03:22 AM
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Re: What would happen if you connected your battery backwards?

ok well i just started a thread on the mythbusters website asking what would happen if you made this mistake. Here is a link that way you can follow what other peoples response are.

http://community.discovery.com/eve/f...01#40719982001
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#21 Old 02-03-2009, 03:42 AM
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Re: What would happen if you connected your battery backwards?

My brother did it on my S13 a couple of months ago. He was almost killed. Not from the battery, but from a beat down he should have received.

Just blew out some of the big fuses under the hood.
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#22 Old 02-03-2009, 04:22 AM
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Re: What would happen if you connected your battery backwards?

I did some research and retract my statement. If it weren't for the alternator you would probably be safe. It looks like hooking up a battery backwards will flow freely through your alternator's diodes (the right way) directly from - to + unless there is a fuse in the circuit. I don't recall any fuses being in an alternator circuit so it is possible for the battery to explode if your wires don't melt first. Most everything else on an automobile is on a fused circuit.

Here is a schematic diagram of an older alternator.



The current would flow from - (which would be the + in the diagram) straight through the isolator diode and through all 6 diodes in the diode tree to the + (which is would be the ground in the diagram with the triangle line things next to the 6 diode tree.)

So yes the battery could potentially explode if there are no fuses in the alternator circuit when you attached the battery backwards. This is also assuming the diodes can handle a few hundred amps long enough to pop the battery.


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#23 Old 02-03-2009, 04:42 AM
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Re: What would happen if you connected your battery backwards?

You would probably destroy the diodes first leaving the circuit open.

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#24 Old 02-03-2009, 10:10 AM
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Re: What would happen if you connected your battery backwards?

You could fry the 'shipping fuse' if you did something this stupid , Don't ask how i know ! Nothing else was damaged .

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#25 Old 02-03-2009, 11:24 AM
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Re: What would happen if you connected your battery backwards?

Good times would happen! hehe


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