Those fuses are copper, the fuse block is some other metal.   They are
exposed to the atmosphere also....Electrolysis, waiting to happen, Two
dissimilar metal with a current running through and atmosphere with some
moisture in the air.........You should see what happens when there's a
similar set-up near or in Seawater....

On Sat, Jul 4, 2015 at 8:49 PM, David Beierl <dbeierl@attglobal.net> wrote:

> At 03:46 PM 7/4/2015, Neil N wrote:
>
>> wasn't cooling on 12V. The issue seemed to boil down to a little
>> corrosion in the small dished portion at lower brass part of fuse
>> holder near the driver seat.
>>
>
> Euro-type fuses have an extremely narrow contact area exactly at the
> edge of the little hole in the contact.  The contact can look shiny
> and wonderful everywhere else and it won't matter.  The
> quick-and-dirty way to clean up the connection is to spin the fuse
> with your fingers.  A burnishing tool made to look like a fuse could
> be very handy.  That might possibly consist of a selected ceramic
> fuse body with the element removed.
>
> Yrs,
> d
>