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Horn
https://www.smwebhead.com/phpBB3/viewtopic.php?f=21&t=2304		 Page 6 of 7
Author:  230 Mike [ Mon Jul 27, 2009 9:44 pm ]
Post subject:  Re: Horn
You might be right about a relay - seems like a strange problem. Thanks for the update! Glad to know it'll fit.
Author:  Graham R [ Tue Jul 28, 2009 2:39 am ]
Post subject:  Re: Horn
Almost certainly due to a voltage drop at the helm wiring; the multitude of connections behind the dash are not wonderful for allowing full battery voltage to reach the switches etc!

Graham
Author:  Jim_R [ Tue Jul 28, 2009 2:23 pm ]
Post subject:  Re: Horn
The horns need to be wired in parallel, not in series. (Ducks, and runs for cover.)
Author:  FWFord's [ Tue Jul 28, 2009 5:02 pm ]
Post subject:  Re: Horn
Jim_R wrote:
The horns need to be wired in parallel, not in series. (Ducks, and runs for cover.)


I wired them both ways - in parallel and in series but same result. I will check the voltage at the horns next.

Thanks
Author:  Jim_R [ Thu Jul 30, 2009 3:38 pm ]
Post subject:  Re: Horn
Let us know how it goes. My guess is an issue with the Y connections to the individual horns.
Author:  230 Mike [ Thu Jul 30, 2009 4:09 pm ]
Post subject:  Re: Horn
Mine's on the way. It was the last one they had. I told him what was going on and he said he'd order a couple more in case anyone else calls.
Author:  230 Mike [ Fri Aug 07, 2009 10:51 pm ]
Post subject:  Re: Horn
Jim and/or Sushi,

Did you make up your harnesses with 16ga wire, or does it need to be 14ga? I realize it shouldn't make a whit of difference for the few inches of run involved; I'm just not going to have time to take this apart and start over once I'm done. Did either of you have any problems like FWFord is having with it? Any thoughts before I dig in?

I noted that one of the horns on the new unit has the same molded-in part number as the original single horn.

BTW, the terminals on my original were getting surprisingly oxidized for their age and storage conditions. I recommend people pull their horns and put some dielectric grease or Ox-Guard on them.

Edit: The ground side on mine is 14ga. and the hot is 16ga. I think I'll connect mine with all 14ga.
Author:  Flying Sushi [ Mon Aug 10, 2009 6:45 am ]
Post subject:  Re: Horn
Mike:
I did not rewire everything. However, I used 16gauge wire since it draws 12A max (together). Factory ground wire is 14 gauge since it is picking up (common) with both side of docking lights. I also change fuse to 15A. I did not use relay since I do not have any issue yet.
Author:  Jim_R [ Mon Aug 10, 2009 10:12 am ]
Post subject:  Re: Horn
Flying Sushi wrote:
Mike:
I did not rewire everything. However, I used 16gauge wire since it draws 12A max (together). Factory ground wire is 14 gauge since it is picking up (common) with both side of docking lights. I also change fuse to 15A. I did not use relay since I do not have any issue yet.


Same here, except that on my 200H I didn't bump up the fuse - left the stock 5A fuse in place. No issues here either.
Author:  230 Mike [ Mon Aug 10, 2009 10:34 am ]
Post subject:  Re: Horn
Thanks guys, I appreciate the info. Interesting that the dual unit is rated for such a higher draw than what it is apparently drawing (since Jim is having no issues with the original 5A fuse).
Author:  Jim_R [ Mon Aug 10, 2009 10:52 am ]
Post subject:  Re: Horn
230 Mike wrote:
Thanks guys, I appreciate the info. Interesting that the dual unit is rated for such a higher draw than what it is apparently drawing (since Jim is having no issues with the original 5A fuse).


Yeah, that 5A fuse I'm using is what makes me scratch my head when thinking about the issue FWFord's having.
Author:  230 Mike [ Mon Aug 10, 2009 11:22 am ]
Post subject:  Re: Horn
Just adding to the fray, here's a nice set of current limit tables and voltage drop calculator.

http://www.powerstream.com/Wire_Size.htm
Author:  230 Mike [ Fri Aug 14, 2009 1:00 am ]
Post subject:  Re: Horn
Got the horn in tonight (by headlights - it's too darned hot to do any work during the day right now). I still need to zip tie the wires to keep them away from the anchor and install the grill, but everything else is in place and connected.

I can't add much to what Jim & Sushi have already posted as far as the install goes. I made my pigtails up using 14ga. Ancor tinned copper marine wire, AMP crimp terminals, a crimper with the right dies, a tiny dab of conductive grease in each terminal to protect them from oxidation, and polyolefin shrink.

The two holes in the hull were ~1/16" too close together for the new mount, so I had to elongate one of them a bit, then re-chamfer both holes. Drill bits cut sideways through that part of the hull pretty easily.

I agree with Sushi that it sounds pretty car-like, but it's still an improvement.

Thanks to everyone who braved this project before I did and offered all the tips, part numbers, etc. Thanks especially to Jim for pursing the whole thing in the first place!

I'll post a pic or two when I can.

Single horn .mp3

Dual horn .mp3

Pigtails:
Image

Ready to install:
Image

Closeup of horn markings:
Image

My hull, ready for the new unit:
Image
Author:  Jim_R [ Mon May 17, 2010 10:57 am ]
Post subject:  Re: Horn
FYI - I originally went with the stock 5 amp fuse on the horn circuit even after the upgrade. My 15 year old son went a little nuts with the horn this past weekend, and that 5 amp fuse did finally blow. I'm now using a 10 amp fuse, and keeping the son off the horn as much as possible.
Author:  230 Mike [ Mon May 17, 2010 11:06 am ]
Post subject:  Re: Horn
Thanks for the update, I guess I'll make that change.
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