Horn

[bkgoodman]

My horn died - and I (tried to) replace it. I bought a dual-trumpet type (12v).

The horn comes with two trumpet and two sets of wires (red and black). When I connect the red and black of ONE of the trumpets to the horn wires, it works.

When I connect the red and black of the OTHER trumpet, it works.

When I connect BOTH reds to the green (positive) on the boat, and BOTH blacks to the black (negative) of the boat, I hear a tiny faint squeak, and then nothing - only to discover I have a blown fuse.

I verify this by testing twice.
I verified that green is positive and black is negative with a meter.
I tried a larger fuse on the very slim chance that 10 AMPS wasn't enough to power both trumpets.

I'm thinking there is something fundamentally wrong with my understanding of the horn....

Any ideas???

[seapuppy]

if I remember right....it takes a 15amp fuse but also I thought they were wired in series....try that....


SP

[bkgoodman]

I was wondering about that. But then I though that the series wiring was probably for 24 volt electrical systems - when, when wired in series - would give +12v for each trumpet. Probably worth giving it a shot, though! :-O

[Nauti Jenks]

I have a 2400 SCR any idea on a good place to find horns for replacement, mine sounds terrible

[shrew]

Originally Posted by Nauti Jenks

I have a 2400 SCR any idea on a good place to find horns for replacement, mine sounds terrible

Any marine chandler will sell horns. West Marine, Defender, Overtons, Great Lakes Skipper......


As far as the 'GREEN' goes, I guess you learn something new everyday. I always thought green was for the bonding system.

[bkgoodman]

Originally Posted by shrew

As far as the 'GREEN' goes, I guess you learn something new everyday. I always thought green was for the bonding system.

You'd think... There is only a black and green running to the horn itself. I verified (meter) that green is positive and black is negative (when the horn switch is pressed). As you'd expect - it was in-fact a green wire running to the switch and fuse panel - so it all adds up.