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Old 08-08-2007, 10:13 AM   #1
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Location of Horn Relay?

Anyone know where the horn relay is located on the classic motorhome?

Mine is an 84 310 Limited.
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Old 08-08-2007, 10:55 AM   #2
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I have an air horn on Chummy the relay is mounted on the left side of the steering wheel above the floor mounted bright light switch.
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Old 08-08-2007, 11:52 AM   #3
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Kent,

Thanks for the reply. I have electric horns. I don't know how Airstream decided whether to install air -vs- electric horns. You don't have air brakes do you?

I'll check where you suggest.

Anyone with electric horns know where their relay is located?

Guy
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Old 08-08-2007, 02:08 PM   #4
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Sorry, I don’t know the relay location.
Can I ask a related question without stealing your thread?

Electrically what is the purpose of a horn relay?
Why not hard wire from power, through fuse, to horn with the horn button supplying the ground path like on an old car?

Does a relay somehow “boost” amperage to the horn?
Thanks
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Old 08-08-2007, 02:11 PM   #5
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yes. the relay "boosts" amperage of the horn. they can run smaller wire into the steering column.
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Old 08-08-2007, 02:42 PM   #6
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Thanks Michelle,

PS:The cover worked great!
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Old 08-08-2007, 03:05 PM   #7
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As important as the wire size is the fact that the 'switch' - i.e. horn button doesn't have to carry a lot of current (amperage) thus the switch is lighter duty and less likely to overheat or get burned contacts.

Now, anybody got a manual where they can look up the location of the horn relay?
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Old 08-08-2007, 09:09 PM   #8
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Quote:
Originally Posted by guy99
Now, anybody got a manual where they can look up the location of the horn relay?
Guy,

I checkout out our 310 and I sure couldn't find the relay. I've been through the service manual for the coach and don't remember any references to the horn relay. The original chassis horn does work on ours so if I get time tomorrow I'll unhook the horn wire and see if I can locate the relay by listening for the clicking.

Brad
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Old 08-09-2007, 06:36 PM   #9
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Quote:
Originally Posted by guy99
Now, anybody got a manual where they can look up the location of the horn relay?
Guy, the relay is located in the middle of the picture.

Click image for larger version

Name:	310-horn-relay.JPG
Views:	122
Size:	113.0 KB
ID:	42890

When I first tried our horn button a while back I thought the only horn that was honking was the one near the radiator. It turns out the electric horns on top actually work! I think they just need a good cleaning.

Hope the photo helps.

Brad
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Old 08-09-2007, 06:45 PM   #10
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Thanks, Brad. Glad that your roof-top horns now work.
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Old 08-10-2007, 06:40 AM   #11
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Guy,
no, I do not have air brakes but a small compressor just for the horn. This was an option by AS. Chummy was first owned by a doctor in California and he order all the bells and whistles from the factory. This one still works. Most of the gadgets have been removed.
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Old 08-12-2007, 08:25 PM   #12
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Quote:
Originally Posted by bkahler
Guy, the relay is located in the middle of the picture.

Attachment 42890

When I first tried our horn button a while back I thought the only horn that was honking was the one near the radiator. It turns out the electric horns on top actually work! I think they just need a good cleaning.

Hope the photo helps.

Brad

Brad,
Thanks again. Horns are working .
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