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Old 08-02-2007, 07:14 AM
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Fuse Caution

Warning; wiring damage due to junk aftermarket fuses
From GM hotline,
We have now had two vehicles come into our department with extensive wiring harness damage. Both of these vehicles had a replacement 15 amp fuse instead of the GM fuse. The fuse does NOT “pop” causing the wiring harness to catch fire. The fuse has a clear, hard plastic blue body with the amperage stamped into the top there is no white paint on the fuse. There are no identifying marks on the fuse to tell who is making it. The fuse is distributed by Harbor Freight, I attached a picture of the box of fuses. Your dealers should look out to make sure that suspect wiring problems are not caused by these defective aftermarket fuses. The 15 amp fuse on this particular truck did not “pop” even at 50 amps. The fuse in the second picture still tests “good” even after a direct short across the battery. We tested six of these fuses and none of them pop.

Storehouse brand, mini-blade type
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Old 08-02-2007, 09:06 AM
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re: fuse caution

Has anyone informed Harbor Freight of this? Must be another case of bad Chinesse garbage
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Old 08-02-2007, 02:15 PM
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I just bought three boxes of those things! I got one of each kind but I got them for half price so I only have $15 worth of garbage, and that's EXACTLY where they are going!

Thanks for the heads up you may have saved me and a heck of a lot of other people a lot of trouble and expense.


I bet they would work as good as Aluminum foil and be a lot easier to install.
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Old 08-02-2007, 04:24 PM
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Doc here,

Thanks for the warning..

Wonder if some idiot put a 150 link in a 30 amp body in the factory.....Good QC..


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Old 08-03-2007, 12:45 AM
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Hey, at least they're blue, right?
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Old 08-03-2007, 07:41 AM
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I did some testing last night since I was working on a fuel gauge anyway and I tried a several of those fuses, this was a very crude test using a DC motor and amp meter. I tested some up to 15 amps (my meter won't go over 20) and by loading the motor I could vary the load up to about 20 amps. They all seemed to pop at about the right range but then I only tried a few of each and who knows which ones are good and which ones are bad. Since there is no way to test each one without destroying it this test is really useless and proves nothing so I still intend to toss these things because the consequences of fuse failure could be disastrous. I only mentioned this because I thought someone might be interested and I am not suggesting to either use any you might have or throw them away but mine seem to be ok. Just looking at the wire inside the fuse case I don't think the 15 amp could carry anywhere near 50 amps just from the size of it so I would think the bad ones must have a much larger wire (conductor?) inside that should be easy to see but still with the insignificant cost of a good known quality fuse why risk it?
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