What would cause this. (Picture)

MyNeonSaysHi · Post by **MyNeonSaysHi** » Wed Oct 28, 2009 3:55 pm

Notice scorch mark on left side thats kind of deep.

Bad ground?

Themaggots · Post by **Themaggots** » Wed Oct 28, 2009 4:29 pm

Not a ground. Fuse are placed in-line with what they are intented to protect, bad connection and too much amperage going through it might have made a spark powerfull enough to melt it.

ragek23 · Post by **ragek23** » Wed Oct 28, 2009 5:32 pm

Danteneon · Post by **Danteneon** » Wed Oct 28, 2009 5:54 pm

But the fuse isn't blown?

Dylan-00Blue · Post by **Dylan-00Blue** » Wed Oct 28, 2009 6:27 pm

it wouldnt need to be blown to do that

esteinmaier · Post by **esteinmaier** » Wed Oct 28, 2009 6:46 pm

One might think the fuse would blow before it arcs enough to burn the connector. But hey, wierder things have happened.

fixitmattman · Post by **fixitmattman** » Wed Oct 28, 2009 8:00 pm

Fuses blow under sustained over current, or very high peak currents. It can very well arc like that with a poor connection.

OB · Post by OB » Wed Oct 28, 2009 8:46 pm

^Most circuits I've dealt with that had a short burn new fuses the second of putting them in. Breakers, on the other hand, sometimes take a few seconds to a few minutes (depending on what type).

ZeroChad · Post by **ZeroChad** » Wed Oct 28, 2009 9:39 pm

Looks like a mechanical problem to me. Poor connection.

MyNeonSaysHi · Post by **MyNeonSaysHi** » Wed Oct 28, 2009 11:31 pm

Thanks guys. I will check all my wiring on the fuel pump rewire. (Did the fuel pump rewire 4 months ago)

gilly02le · Post by **gilly02le** » Thu Oct 29, 2009 12:49 am

squeeze the connector a little bit tighter before you put the fuse back in. Almost looks like it was just a loose connection between the fuse, and the spade terminal it pushes into.

BlackRoseRacing · Post by **BlackRoseRacing** » Thu Oct 29, 2009 5:43 am

gilly02le wrote:squeeze the connector a little bit tighter before you put the fuse back in. Almost looks like it was just a loose connection between the fuse, and the spade terminal it pushes into.

Agreed, The fuse may have not blown since the amperage was not high enough, but the loose connection may have caused a plasma cutting type effect to the terminal due to being loose...

hybrid-Srt2001 · Post by **hybrid-Srt2001** » Thu Oct 29, 2009 5:51 am

flux capacitor... check it

Post by **occasional demons** » Thu Oct 29, 2009 7:26 am

Looks like an ATO fuse (vs the ATM (mini) ) If the connector in the PDC is fried, you can get a replace ment at AZ in a Ford terminal kit. IDK the PN tho or http://www.delcity.net/documents/catalo ... access.pdf

Page 152 PN 7388520 These will not work on the mini fuses. I have yet to find a source for those.

If you are not using the PDC, but a seperate fuse socket, then disregard.

BigMac · Post by **BigMac** » Fri Oct 30, 2009 3:35 am

That mark was caused by arcing due to a loose connection or a poor contact surface. Either the fuse blade wasn't touching the contact tightly, or the contact is dirty/burnt/pitted and can no longer make a clean connection. In such cases you have a high-resistance connection which creates a great deal of heat, which is what causes the burning and pitting.