What the Hell happened here???
#12
#13
I see how you were thinking and I like it.
#15
Short of the fuse being jumpered with a wire or foil or something, (I see no evidence of a jumper), There is ONE plain and simple reason for this happening and only one reason.
The fuse was loose in the holder and an ARC was created (when the fan kicked on) from the spade of the fuse to where it was supposed to make connection in the holder.
This was caused by the fuse being loose in the holder, and/or the fuse holder being defective.
I am going to say that this arcing happened on the "upstream" prong of the fuse.
The fuse was loose in the holder and an ARC was created (when the fan kicked on) from the spade of the fuse to where it was supposed to make connection in the holder.
This was caused by the fuse being loose in the holder, and/or the fuse holder being defective.
I am going to say that this arcing happened on the "upstream" prong of the fuse.
#16
Do you know where that fuse was bought? Harbor Freight had to recall several fuses in the past because they would not blow and started some fires when they melted. GM even sent a letter out to their dealers warning them of those fuses.
#18
to use Ohm's law you would need to know volts (easy) and resistance not as easy as you have to completely disconnect the motor from everything probably by cutting the wires and at 12v resistance measurements must be precise. Finally it doesn't account for failing bearings or other load generators
JMD's suggestion is the best yet. I hadn't thought about arcs. It could indeed be an issue if the fuse was loose. I thought of another issue just now...if the fuse fit tight then there could have a corrosion issue that may have increase resistance on one leg of the fuse. This could have possibly created a hot spot due to the resistance but if it were that bad I would think fan speed would be very low as voltage would also suffer (but maybe not noticeably). So arc is probably the better bet.
Either way like JMD said replace the holder.
happy hunting.
-Gun
JMD's suggestion is the best yet. I hadn't thought about arcs. It could indeed be an issue if the fuse was loose. I thought of another issue just now...if the fuse fit tight then there could have a corrosion issue that may have increase resistance on one leg of the fuse. This could have possibly created a hot spot due to the resistance but if it were that bad I would think fan speed would be very low as voltage would also suffer (but maybe not noticeably). So arc is probably the better bet.
Either way like JMD said replace the holder.
happy hunting.
-Gun
Last edited by Gun Jam; 07-16-2009 at 03:09 PM.
#19
Changed the upper radiator hose on my car, started the engine and was making sure the air was out of the system and I see wisps of smoke coming from the fan fuse holder.
I see this:
How in the world can a fuse melt without burning the element???
I have never witnessed this before. It's the 30amp fuse that came with the controller. Woweeeeee, that would have been fun to put out in a hurry.
I see this:
How in the world can a fuse melt without burning the element???
I have never witnessed this before. It's the 30amp fuse that came with the controller. Woweeeeee, that would have been fun to put out in a hurry.
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KingRando
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10-02-2015 08:06 AM