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Old 04-20-2013, 12:32 PM   #1
Join Date: Apr 2013
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Air horn beeps on startup 06 Monaco Camelot 40PDQ

I have just purchased an 06 Monaco Camelot 40PDQ to replace our 5th wheel and diesel truck. Have just driven back from Arizona, where we purchased the unit to our home in Calgary, Alberta.

I'm sure we will be happy with the new unit but there is a big learning curve involved in making a switch such as this.

I'm new to this forum also so this should be the first of many questions...

When I start the unit and turn the ignition key, the air horn gives a short beep which tends to turn heads and may not endear us neighbours in CG's when we leave at 6 am!

Anyone know why this is happening and if there is any way I can disable this feature? There is nothing in the owners manual that addresses this.

Thanks, Dave B

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Old 04-20-2013, 02:05 PM   #2
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Congratulations on the new RV. I'd try to figure out what turns on the horns, a dash switch, horn ring, etc. Then disconnect or remove the appropriate fuse or wire and see if it still toots. I've never seen a rig set up to toot the horn on start up. Once you figure out how it blows, you'll have to work backwards and see what's triggering a startup toot. If you find the wires connected to the air solenoid that probably controls the air to the horn, attach a meter or light to see if it's getting 12 v when the key or starter is engaged. Good luck with it! Just remember, figuring this out will probably teach you a bunch about the RV you didn't know before!


Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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Old 04-20-2013, 03:14 PM   #3
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It sounds like the air line switch is opening when the air pressure drops. When you start the motor and build air pressure it leaks by for a second, and then closes.
Just a thought.
2016 Wildwood 28RLDS
2014 Tundra 1794 Platnum,"23" T-Bucket
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Old 04-20-2013, 03:19 PM   #4
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If the problem only happens when the coach has been sitting for a while, you will probably find that it is a failing valve. When a driver toots an air horn, a servo or manual valve lanyard pulls the valve open against the air pressure from the compressor.

The valve only has a small spring to keep the valve closed because there is usually lots of air pressure helping to keep the valve closed. So, with a weak valve spring, the horn toots upon start-up as pressure builds.

But, if it happens on every start-up after long or short shut-down, then you have a problem in the horn button circuit...a more complex issue. I don't believe anyone would engineer a start-up beep, but you never know.

Best of luck
Kim and Steve, Mustang LCDR (USCG Ret), Outlaw #1193
"I have seen gross intolerance shown in support of tolerance", S.Coleridge 1797
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Old 04-20-2013, 03:26 PM   #5
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Pay attention to air pressure before start up. If it is low and you get a toot on start up, I'd agree with a weak spring in air valve. If it happens when pressure is above 60-80 psi it's more probably an electrical problem.

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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Old 04-20-2013, 08:54 PM   #6
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Congrats on the new coach! If you have a smartwheel in your coach it could be in that circuit. A smartwheel has wipers and cruise and headlight blink marker light blink buttons on it. On my coach when I turned the ignition switch on it would cycle the wipers once. I could be driving down the road and the horn would honk for no reason. That gets some dirty looks. Under the dash on mine is the smartwheel controller and I unplugged it and checked the plug (found nothing) and re plugged it in and it cured it. I have a rocker switch that will disable the air horn but then the electric horn is on. I wired a switch into the elec. horn circuit to shut it off as well. Every once in a while it acts up. I should replace the controller. That may be your problem. On your coach I would think there is a horn switch as well. There are several plugs under the covers around the steering column that could cause problems too. Good luck and enjoy your new rig.
Dennis & Marcie & Captain Hook The Jack Russell,aka PUP, 1998 HR Imperial 40 ft RVM59
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Old 04-21-2013, 07:50 AM   #7
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I have had it happen when replacing the chassis batteries, at the instant I touched the negative cable to the terminal for the final connection ...and found another owner who had the same. I can't explain why, but in your case checking all electrical connections to the air horn setup, especially grounds, may be helpful.

Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '05 Honda Odyssey toad
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