Almost had a fire

Zeptoplix
10+ year member

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http://www.canadiancaraudio.com/cableinfo.html

Okay, so based on that chart, as I suspected, a three or four foot length of 4 gauge cabling could be fused at 150 amps from the alternator to the battery, Its fused a little high considering the alternator only produces 130 amps, but the cable should be able to withstand that draw.

Well today I smelled something, so I popped the trunk, and everything seemed fine

I then proceeded to look under the hood and this is what i saw.

DSC03304.jpg


I am at a loss to figure this out.

At the same time as removing this, I also discovered that the fuse i put in line in the place of a fusible link, was blown. However, the car was driving up until the point that I cut that cable , so its possible I blew it accidently. I put in a new fuse and it was fine.

I took the precaution of cutting the cable out, as I was unsure if it was shorting somewhere.

However, I still do not feel that it should have melted the cable, it should have blown that fuse, right?

It was a Tsunami 150 amp mini anl fuse, and same brand holder. Looking in at the fuse, all the plastic came off the metal, but the fuse itself remains intact. I do not see anywhere where it was shorting; and up until this, I haven't had any wierd electrical problems.

Other info: I have upgraded the big three (well just two now I guess since this is pooched, using 4 gauge cabling. I have two 4 gauge cables running to the trunk, as thats what I had from previous installs, so I used it again, and a second battery in the trunk. The place I was iffy about the 150 amp fuse, was on one of the cables running the length of the car; due to the length of the run. One is fused at 150 and the other at 80 since I haven't bought a nother mini anl holder.

Any ideas?

 
I replaced a fuse holder on a customers 8ga wire today w/ a similar issue.

It was a loose connection.

Once you get one, you actually have more resistance than a good connection.

Higher resistance = heat.

Replace it and fuse at 100a.

 
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Zeptoplix

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