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Marathon Air Horn/City Horn
My Marathon has air horns behind the bumper and what I believe are Prevost electric “city” horns. When you push the horn button on the steering wheel, both set of horns blow.
My previous Liberty had a dash switch to choose between air horns and city horns. I found that useful.
When I started checking out how the Marathon horns are wired, I found them connected to a relay labeled AHE. It appears that when a control voltage is applied, it turns off the air horns, just leaving the city horns functioning. What I don’t know is where is the switch that controls this function, or under what conditions is it active? There is not a Prevost rocker or a Marathon EAO switch that has that functio0n. I tried any unlabeled Marathon switches without success.
Any of you long term or multiple Marathon owners have any ideas?
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2 Replies
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In reading through the Prevost owners manual for your coach, it indicates that when your coach was new, that it had separate buttons for the city and air horns on the steering wheel.
The City horn buttons were at the 10:00 oclock and 2:00 oclock positions on the steering wheel spokes and the air horn button is in the center. I know that on the older coaches that Marathon changed out the steering wheels when they did the conversion. Of course I have no idea if that is the case with your coach.
I suspect that information is probably no help if marathon wired them in together If and When they replaced the steering wheel. Maybe contacting Marathon could shed some light on the modifications done?
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Tim, thanks for the thought, but my steering wheel only has one horn button across the bottom of the center pad.
I did get a solid answer from Marathon today. The way is is set up (by Marathon) is key off = city horn, engine running = city horn and air horn.
I still want to be able to select the horn manually, so I think I can add a horn select switch to control the existing relay. Just need to source the switch itself. Prevost has a switch cover that read PNE on top and ELEC on bottom. That would work, but I’d l;ike to find one that says “City Horn”. The search continues…
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