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03-22-2020, 10:04 AM
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#1
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Senior Member
Join Date: Oct 2019
Location: indiana/florida
Posts: 210
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Roof Horns
ok, need help. i know the roof horns on my 2005 dolphin 5320 are electric not air. they were stopped up with debris, cleaned them out. can someone tell me how they work and how to get them to work?
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03-22-2020, 10:28 AM
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#2
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Junior Member
Join Date: Dec 2019
Location: Garner, NC
Posts: 16
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I have not had problems with roof horns, but I have had the same type of problems on my motorcycle horn. After making sure all of the debris is clear, try spaying some WD40 into the horn.
__________________
Mike and Rita
2017 Thor Vegas 25.2
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03-22-2020, 12:28 PM
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#3
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Senior Member
National RV Owners Club Workhorse Chassis Owner
Join Date: Feb 2011
Location: Covington, GA
Posts: 785
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There is a pretty much direct replacement horn set from Defender Industries, a marine supplier. Here's a link to their catalog page for Item # 551928 Ongaro deluxe stainless steel trumpet horns.
https://www.defender.com/product3.jsp?name=ongaro-electric-deluxe-marine-dual-trumpet-horns-12-volt-dc&path=-1|135|2290125|2290127&id=147388
They're not cheap at just under $140 (on sale now for $109) but they are very effective and when you honk you sound a lot more like a semi than a VW which the grill horns provide. Specs say they are 122db at 1 meter and I'd say they're every bit of that.
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J.J. Hayden (KN4SH)
Covington, GA
2005 National Dolphin 5342
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03-22-2020, 03:20 PM
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#4
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Senior Member
Join Date: Oct 2019
Location: indiana/florida
Posts: 210
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horns.
Quote:
Originally Posted by JJH3rd
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thanks, not looking to replace them just want to get these working if possible.
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03-22-2020, 03:40 PM
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#5
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Senior Member
National RV Owners Club
Join Date: Mar 2012
Location: Lac Du Bonnet, Manitoba
Posts: 685
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Inside the back cover of the horn, there is an adjustment screw with loctite on it. This adjustment screw adjusts the gap on a set of points. The points may also need cleaning as they have to be able to conduct current from the 12 volt supply when the horn is pressed on. The gap of the points needs to be adjusted so it clauses the diaphragm to vibrate(oscillate) when the horn is energized. When energized, adjusting the gap of the points
will "tune" or change the horns tone.
If set too far one way or the other, no diaphragm oscillation or honk will occur.
__________________
Ellen & Greg
08 National Dolphin DL-35Ci, RoadMaster Rear Sway Bar, Rear Trac Bar, Koni Shocks Front,
Workhorse W22, Kelderman Air Ride, Towing 2016 Smart Car
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03-23-2020, 07:40 AM
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#6
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Senior Member
Workhorse Chassis Owner
Join Date: Jan 2002
Posts: 1,896
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You did not say that you were on the roof with your multi-meter checking the horn for 12 volt......as your co-conspirator pressed the horn button. Done that ? There might be a fuse to check ??
__________________
2003 Dolphin LX 6355 w/ W22 chassis; 8.1L gas & Allison 1000
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03-23-2020, 05:25 PM
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#7
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Senior Member
Join Date: Mar 2019
Location: Arizona
Posts: 2,234
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Quote:
Originally Posted by GREGORYJ
Inside the back cover of the horn, there is an adjustment screw with loctite on it. This adjustment screw adjusts the gap on a set of points. The points may also need cleaning as they have to be able to conduct current from the 12 volt supply when the horn is pressed on. The gap of the points needs to be adjusted so it clauses the diaphragm to vibrate(oscillate) when the horn is energized. When energized, adjusting the gap of the points
will "tune" or change the horns tone.
If set too far one way or the other, no diaphragm oscillation or honk will occur.
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Great info. Mine don't seem to be working either so I'll give that a try (after checking for 12V at the horns).
__________________
2004 National Dolphin LX 6320, W-22, 8.1, Allison 1000, Front/rear "Trac" Bars & Anti-sway Bars, Sumo Springs, Roadmaster Reflex Steering Stabilizer, 2005 PT Cruiser Toad
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03-24-2020, 04:37 AM
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#8
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Senior Member
Join Date: Oct 2019
Location: indiana/florida
Posts: 210
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many thanks to all. i do have 12 volts at the horn, took them apart and they were stopped up with debris, cleaned points good and tried adjusting then put ohm meter on coil , no continuity so i ordered new horns.
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04-01-2020, 11:26 AM
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#9
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Senior Member
Join Date: Oct 2019
Location: indiana/florida
Posts: 210
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done
Quote:
Originally Posted by JJH3rd
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just to let you know, i bought these and they were an exact replacement. easy swap out and work great. thank you.
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05-12-2020, 01:01 PM
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#10
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Junior Member
Join Date: Aug 2012
Posts: 4
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Roof horns
How do you get them to work
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05-13-2020, 03:57 AM
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#11
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Senior Member
Join Date: Oct 2019
Location: indiana/florida
Posts: 210
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Quote:
Originally Posted by baberin
How do you get them to work
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i replaced mine they were set up to blow with the regular horn button, my old ones was getting voltage from the button but would not work so i simply replaced them. about 125.00, love them. they are electric not air as one would think.
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05-31-2020, 08:10 AM
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#12
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Senior Member
Monaco Owners Club National RV Owners Club Workhorse Chassis Owner
Join Date: Dec 2013
Location: St. Charles MO
Posts: 4,920
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These trumpet horns worked well for me and are nice looking.
__________________
2002 Monaco Windsor 40PST 2019 Equinox 1.5L, Blue OX Aventa LX tow bar, Roadmaster EZ5 baseplate, SMI Stay-In-Play Duo, TireSafeGuard TPMS
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