I keep my voltmeter in my traveling tool kit. One of the reasons is that a
continuity check is always on the list of troubleshooting items.

On Sat, Jul 4, 2015 at 11:47 AM, Dan N <dn92610@gmail.com> wrote:

> I am installing a Hella twin horns on my van
>
> I got a harness with relay from Jay Brown and install everything using the
> instruction... easy...
>
> but then when finished the horn didn't work ! !
>
> so...
>
> - I visual check for the fuse -> looking good
>
> - I check for the 12V+ on the stock pos. wire -> nothing
>
> - I visual check for the fuse again -> it looks OK, visually
>
> - I amp. meter check the fuse -> nothing
>
> weird...
>
> - so I take out the fuse (#16) and put in a new one
>
> - I check for the 12V+ on the stock pos. wire  again -> I got 12.5V
>
> and hooraaay ... it's working... I have horn now... ! ! !
>
> so lesson learned....
>
> a good looking fuse doesn't mean a GOOD fuse! ! !... aaargh...
>
> who can imagine that.... aaargh made in China ! ! !
>
> this incident scares the heck out of me...
>
> what will happen if the fuse of the fuel pump  for ex. - or any critical
> fuse - is blown but still *"looking good"*?
>
> even a mechanic will spend a day to trouble shoot and throw a lot parts on
> it...
>
> next time if you do something with electrical check the fuse... better yet
> put in a new one... they are cheap and they wear out too...
>