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Air horns quit in rain

Forgot on last weeks trip, it rained steady one night while camping and now my air horns quit. I hear the air on top when I depress the horn button but no sound out of the horns. They are the original horns and worked before the rain.
Any ideas? Is there a rebuild kit? They look brand new, hate to change them out
Thanks
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Air horns quit in rain

Reply #1 –
My WAG, but either the air hose(s) worked loose, or the diaphragm(s) are blown. Parts are available.  edit...removed bad url link.
2001 4010 U320 build #5865 "Bluto-d-Bus" since 09/18
2006 Honda Element ESP Toad
Full timing since 2016 in Western MT
Copilot: Sitka
1975 GMC 260 Avion: sold

Re: Air horns quit in rain

Reply #2 –
Here is a post as to how to clean and inspect
Weak Horn

Mike
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Air horns quit in rain

Reply #3 –
I'll give them a check. Thanks
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Air horns quit in rain

Reply #4 –
Start by checking the electrical connections at the solenoid that controls air to the horns.  The horn button opens the solenoid to allow air to the horns.  Check for power there AND a good ground. 
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Air horns quit in rain

Reply #5 –
Quote from: wolfe10 –
Start by checking the electrical connections at the solenoid that controls air to the horns.  The horn button opens the solenoid to allow air to the horns.  Check for power there AND a good ground. 
Happened on ours when a wire came off. Push horn button and listen for solenoid.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Air horns quit in rain

Reply #6 –
Yes, I can hear the air at the horns just no sound out of them
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Air horns quit in rain

Reply #7 –
If the solenoid is passing air to the horns, then follow Mike's advice in post #2.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Air horns quit in rain

Reply #8 –
Mine were terribly rusty.  Replaced them
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Air horns quit in rain

Reply #9 –
Quote from: dans96u295ft –
Forgot on last weeks trip, it rained steady one night while camping and now my air horns quit. I hear the air on top when I depress the horn button but no sound out of the horns. They are the original horns and worked before the rain.
Any ideas? Is there a rebuild kit? They look brand new, hate to change them out
Thanks

Link to Hadley:

Technical Docs - Hadley
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Air horns quit in rain

Reply #10 –
pulled the back cover off and all is clean. Where does the air hose actually attach to the horns on the roof? I didn't see it in the rear cover
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Air horns quit in rain

Reply #11 –
The yellow (I think) tubing that supplies air to the horns connection is up in the compartments right below the rear of the horns. Undo the fittings and check for air when you push the horn on the steering wheel. I had mine off when I painted the roof.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Air horns quit in rain

Reply #12 –
The yellow tubing for my Hadleys is in the forwardmost upper compartments.  Right above my blender and food processor.
1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Air horns quit in rain

Reply #13 –
Quote from: Old Toolmaker –
The yellow tubing for my Hadleys is in the forwardmost upper compartments.  Right above my blender and food processor.
Yes, and easy to get at.

P
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Air horns quit in rain

Reply #14 –
Passenger side is where I hear the air. So, right upper corner or above the door cabinet?
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Air horns quit in rain

Reply #15 –
Look at the window behind the passenger's seat. Now look straight up at the front of the window, slide the cabinet door back and there will be a yellow tube coming out of the wall and then into a 90 degree fitting. the nut takes a 1/2" wrench to loosen. The coach is outside so I can take a photo if necessary.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Air horns quit in rain

Reply #16 –
Ok. Found a round access hole in the cabinet above the door. Removed the screws and walla! the air tube is not in the fitting to the horn. Now if I can figure out how to find the tube as it is not in the conduit maybe I can just reconnect it and move onto my dash gauge lights out. Looks like fuse 20, may be the instrument gauge lights, not 25.
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.

Re: Air horns quit in rain

Reply #17 –
Put your head into the compartment and listen while someone pushes the horn to see if you can hear it inside the wall.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)
 

Re: Air horns quit in rain

Reply #18 –
Success!!!!! There are round removable covers under both air horns in the cabinets. Both were probably never tightened at the factory or both worked loose on the brass nuts holding the tubing into the 90 degree bend. I didn't know it but I only had one horn anyway. They are really sweet when both work! Texters beware at green lights, I will use them to get you to move!
Thanks for all the help
1996 U295-36, Cummins 300hp, 8.3. Build number 4864. Vin number 1F97D536XTNO54271. Purchased October 31, 2019.