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Why Would A wire Harness Burn?

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Old 04-19-2011, 04:02 PM
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Default Why Would A wire Harness Burn?

bought a fog light kit from ebay and installed it correctly turned it on and next thing i know i see smoke turns out the wire harness got so hot the insulator was melting , when this happend the fogs were dim,why might have caused this to happen?
Old 04-19-2011, 04:07 PM
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Default Re: Why Would A wire Harness Burn?

You mis-wired something and you bought an Ebay kit.
Old 04-19-2011, 04:08 PM
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Default Re: Why Would A wire Harness Burn?

could it be because i dident properly ground it?
Old 04-19-2011, 04:09 PM
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Default Re: Why Would A wire Harness Burn?

Short circuit or wire gauge is insufficient to handle the amps.
Old 04-19-2011, 04:11 PM
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Default Re: Why Would A wire Harness Burn?

Wires get too hot and melt the insulation when there is too much current (Amps). Usually the fuse pops before that happens. Check your wiring again, and make sure the circuit you added is properly protected by a fuse with the correct rating.
Old 04-19-2011, 04:20 PM
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Default Re: Why Would A wire Harness Burn?

Well the fuse dident pop but the wires are really thin
Old 04-19-2011, 04:25 PM
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Default Re: Why Would A wire Harness Burn?

as stated
bad wiring, insufficent guage.
fuses are so this doesn't happen so check all your wires and grounds again.

if it is a bad kit could you let us know which person you got it from as a heads up for the rest of us?
Old 04-19-2011, 04:33 PM
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Default Re: Why Would A wire Harness Burn?

ebay nuff said
Old 04-19-2011, 05:02 PM
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Default Re: Why Would A wire Harness Burn?

Your problem was you bought from ebay. The fog light harness are very well known to have major issues. Sometimes the harness are bad right out of the box, sometimes they last, and others this happens.

My friend bought ebay fogs, harness went in the trash, and I made a new one.
Old 04-19-2011, 05:10 PM
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Default Re: Why Would A wire Harness Burn?

What do you need to make a harness? heres the one i had,



Uploaded with ImageShack.us





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Fuse that did not blow



Uploaded with ImageShack.us



The wires that led to the lights were the only ones to burn

VVVV



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Old 04-19-2011, 05:20 PM
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Default Re: Why Would A wire Harness Burn?

Originally Posted by 98civdx
Your problem was you bought from ebay. The fog light harness are very well known to have major issues. Sometimes the harness are bad right out of the box, sometimes they last, and others this happens.

My friend bought ebay fogs, harness went in the trash, and I made a new one.


what exactly do you need to make a good harness, Like wire gauge and and could i use the same relay and fuse?
Old 04-19-2011, 05:56 PM
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Default Re: Why Would A wire Harness Burn?

We used a new relay, The only thing we reused from the harness was the plugs going to actually fogs, and the other ones.

I am sure you could reuse the relay if you wanted to.

We were able to de-pin his,not sure if yours will be the same.

I am 99% I used 18 guage, (it was a while ago, so I am not totaly sure)

You'll need, wire,crimpers,cuters, and assorted clips.

I made the harness 3-4 years ago, and as far as I know everything is still fine.
Old 04-19-2011, 07:52 PM
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Default Re: Why Would A wire Harness Burn?

This happened to me:

I bought an eBay fog light kit for a 99/00 Civic and everything was fine except 1 wire was crossed in the harness. So it made the negative wire go to the positive terminal on the fog light, and the positive wire go to the negative terminal of said fog.

Luckily, nothing burned but the fog didnt work. Im guessing thats what happened to your set. The wire gauge that they use is fine, buy red black and white wires and copy the harness but keep an eye out for + and - terminals.
Old 04-19-2011, 07:59 PM
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Default Re: Why Would A wire Harness Burn?

shorted lol.
i had a remote starter relay go bad in one of the cars and it slowly melted all my power wires.(took it about 2-3 months to melt before i notticed and smelled burning)

a direct short would drain power from bulbs making them dim. improper ground would also make the bulbs try to get groumd from where they not supposed to.

too small of a wire would usually melt slower than shorted out.

fuse might be too big.

fuse also has a threshold. it will not blow unless its a big enough current draw. so looks like its 30 amp fuse put smallest fuse there to be safe and increase the rating untill it stops blowing.(fuses are cheaper to replace then wires)
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