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Old 02-04-2005, 07:12 PM   #1
tacomaprime
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Default would this have damaged anything.

I officially hate the temp in my department now.

He calls me tonight and asks if I have left the office yet. I say no. He asks if I can come jump my car. so being the nice guy I am, I say sure.

I go across the street where he has to park (I get the underground parking ) I get there, he has the jumper cables all set to go. Already attached to his car.

I open my hood, grab the cables, and put them on my battery, but first I tell him to put his negative one on his frame, not on his battery. Which he does.

Starts his car. nothing. try a coupe more times. He moves the negative cable to the engine block. Everytime he moves it around, theres an awful lot of sparks flying, im like

After about 2 minutes, he goes over to his battery, checks the cables, and proceeds to switch the post that the cables are on. He had the positive cable on the negative post. Now I didnt even think to check that ahead of time, cause I figured he was smart enough to discern between red and black.

My question is, could this have done anything bad to my battery, or my car? Everything on my car works perfectly fine right now. I checked everything electrical, even the windshield wipers.

Thanks.
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Old 02-04-2005, 07:51 PM   #2
mcowger
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Everything should be fine. As long as he didn't actually REVERSE the cables, you're fine (which is doesn't sound like he did).
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Old 02-04-2005, 07:53 PM   #3
imprezilization
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obviousely, if everything works, your car's fine.

however, there's always a potential danger to burn things when use jumper cables, so next time, use a batt. jumper or call AAA.

personally, i'll never do what you did. if you want to help him, just call triple-A

just my .02
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Old 02-04-2005, 07:56 PM   #4
tacomaprime
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Quote:
Originally Posted by mcowger
Everything should be fine. As long as he didn't actually REVERSE the cables, you're fine (which is doesn't sound like he did).
well thats the thing, he did. He had the positive cable on the frame, and the negative cable on the psitive terminal.

But like imprezilization said, everything works fine, I just wanted to be sure.

stupid newbie coworker.
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Old 02-04-2005, 08:32 PM   #5
ncarn8
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Reversing polarity is bad. Im surprised in the very least it didnt take out his main fuses. But if everything is go in oyur car you got away with it.
You can cook an ecu from less than a backwards connection.
On another note, you probably shouldnt have toomuch to do with this guy, he may drag you down to the IQ level of a lettuce leaf.
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Old 02-04-2005, 08:38 PM   #6
tacomaprime
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yeah, hes not the brightest bulb in the pack.

Today I spent all the morning setting up this laptop, so that I could get a ghost image of it. So when I went to ghost it, hes like "here try this new way to do it" He explained it to me, and it made sense, however, he set the damn boot cd up wrong, so instead of ghosting the hard drive, it wiped it. COMPLETELY. So I spent all afternoon redoing it.
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Old 02-04-2005, 09:34 PM   #7
DrD
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that's why if I am jumping someone else's car, I hook up the cables - period.

(no reason to leave someone in a lurch - we've all been stranded before and it sucks, so I am happy to help, as long as I am sure it's done properly - and the only way for that to happen is to do it myself)
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Old 02-04-2005, 10:12 PM   #8
armand1
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I agree with DrD.

Quote:
Originally Posted by ADIDAS
... I get there, he has the jumper cables all set to go. Already attached to his car.

I open my hood, grab the cables, and put them on my battery, but first I tell him to put his negative one on his frame, not on his battery. Which he does.
...
Just for future ref, you both did it wrong. The key is that *the last connection made* needs to be to the frame. The reason is that the last hookup will likely spark, and if that spark is anywhere near either battery, it could ignite an explosion of hydrogen gas if such had been vented by the battery. The same applies for the *first disconnection made*.
Bottom line: it doesn't matter who makes the last connection or first disconnection, as long as it is not near a battery.
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Old 02-05-2005, 01:04 PM   #9
lowendfrequency
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Just because the car is functioning doens't mean everything is fine. Most electrical damage is classfied as "latent" meaning that failure won't occur until some time down the road. I'm not saying your car is doomed, but if it dies without a good reason you know where to start looking.
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Old 02-05-2005, 01:49 PM   #10
sands
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As the others have said, if everything works, you should be OK.... for now

But if you get a failure in the alternator or the battery conks out sooner then expected, you will know what caused it. Alternators normally fail at the regulator, which probably doesn't like reverse polarity getting thrown at it.

Reversing polarity on a battery will generate lots of heat and may start to prematurely age it or boil off acid.

Next time, do it all your self or not at all.

I used the excuse "Jumping another car will fry my electronics..." and walk away the one time somebody asked for help. (some grungy, scary dudes at a gas station, so not like I left them at the side of the road.)
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Old 02-05-2005, 01:53 PM   #11
suby4ub
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id say your car will be fine this happened to me once. my friend had set up the cables and he did it almost the same way. my car was fine. if all your electrical is working you have nothing to worry about.
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Old 02-05-2005, 01:53 PM   #12
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We had a kid in my auto shop class that " liked the sparks". Well he placed a wrench over the two terminals and it blew up on his desk right in front of him. I looked over when it was smoking and was like " O ****". I ran over to pull it off but when i got there its started to boil. I just turned around ran out of the class room into the shop and slamed the door. Good thing he was the only one in the classroom when it blew up. After the explosion we ran in with a hose and got most of the battery acid off him. But he was a little messed up to start with so no one noticed if he got any stupider.
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