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Old 01-28-2011, 06:45 AM   #1
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1989 34.5' Airstream 345
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Electric Horn wiring diagram on a 345

I think I have see some visiting about tracing the Horn wires from the steering wheel button down the column and then picking them up under the dash before they go to the roof.

I can not find the Post nor the information concerning tracing these wires below the dash.

One of my electric roof horns did not work and the coach was at Bill Dobson of Creston RV for some service work.
He twisted my arm and Installed a set of Hadley air horns and powered them through a push button switch on the door panel switch plate next to the seat adjustment switches as we discussed.

for a backup electric horn. He mounted a new electric behind the grill and we would like to power this electric horn from the original wiring and S.W. Horn Button.

thank you for guiding me to a thread with this information or for helping us out.

John
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Old 01-28-2011, 07:12 AM   #2
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these links came up on a search:
Google Custom Search
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Old 01-28-2011, 08:06 AM   #3
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Thank you rich, I found this from a Poster
quote, 74 Argosy, There is a flat harness coming out of the column, the wires are all bonded side by side and go into a connector, it could be flat or semi rounded. This is for the horn, blinkers, etc. that run off the column. It has to be there if your blinkers are working. The horn wire isn't necessarily green, when you find the connector go by the location, my wire is black.

Have you tried the horn to be sure it is working? They don't last too long. I would run a jumper from a good 12v to the horn before I started on the dash, a lot less work.

Service manuals are good to have. Did they give you a place to get one? I am not sure how long they print (or stock) them.

John
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Old 01-28-2011, 08:13 AM   #4
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Quote, from previous post

The colors on this chart probably won't match yours (my horn wire is black) but the locations are right. Horns draw a lot of power and are operated off a relay. Power feeds to the coil and points of the relay and the button grounds the coil. The relay will be under the dash hanging from the harness.

John
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Old 02-01-2011, 07:25 AM   #5
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I plan on snaking down a hose to the dash air gauge (T-ing). I will use the current wiring to operate the solenoid on the horn itself. I hate the sound of the small air/electric horns that have a weak wind-up and bad tune.
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Old 02-01-2011, 09:07 AM   #6
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Air Horn

John:
You might be better to locate the solenoid closer to the air supply at dash switch?
That way you don't have a continuous pressured line running any distance that could fail and leave you on the side of the road.
Dave
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Old 02-01-2011, 02:13 PM   #7
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Quote:
Originally Posted by masseyfarm View Post
John:
You might be better to locate the solenoid closer to the air supply at dash switch?
That way you don't have a continuous pressured line running any distance that could fail and leave you on the side of the road.
Dave
yes, the new Hadley s have a separate switch Button.

I just want the second option of an electric horn activated by the Original horn button on the S.W.

quote from original post
One of my electric roof horns did not work and the coach was at Bill Dobson of Creston RV for some service work.
He twisted my arm and Installed a set of Hadley air horns and powered them through a push button switch on the door panel switch plate next to the seat adjustment switches as we discussed.

for a backup electric horn. He mounted a new electric behind the grill and we would like to power this electric horn from the original wiring and S.W. Horn Button.

thank you for guiding me to a thread with this information or for helping us out.

John
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Old 02-01-2011, 03:07 PM   #8
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"John:
You might be better to locate the solenoid closer to the air supply at dash switch?
That way you don't have a continuous pressured line running any distance that could fail and leave you on the side of the road.
Dave"

Thanks that was my plan to put a small valve at the T by the dash but have the air pressure at the horns so that there is not that bad sound of an organ with no pressure.
I hope I can snake the air line around that plastic space above the driver.
thanks again for your advice.
Josh
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Old 11-19-2018, 10:34 AM   #9
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A wiring plan or description where the cables run from the roof down to where they have their endings, would be the best help here....
Thanks
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Old 11-19-2018, 05:07 PM   #10
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The horn wiring for the electric roof horns runs down the left side pillar (rear of the sliding window, then runs forward under the sliding/fixed window, it then terminates around the master cylinder area. Regards, Bob
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Old 11-21-2018, 01:52 AM   #11
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Thanks Bob,
There are no cables at the master cylinder area found.....
I just have found the wires, they run under the windows, are ending through firewall on a ground point.
So where do the horn wires end? Normally a relay is needed. I also have found a brown plug with an orange and white cable. That was hanging loose behind the fuse block in dash.

I will post some pics....
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Old 11-21-2018, 10:34 AM   #12
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I already get the horns working now!
Just the green cable at the horn relay was broken.
WOW what awesome loud horns now!

Thanks for the help!
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