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Old 22nd January 2009, 16:05   #1
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Question What is Electro Pneumatic Switch ?

In the description it's said that it helps to "Operate Air Horn very much like Electric Horn". So is this a simple switch that helps to change between Electric & Air Horn ?

Roots Auto Products Private Limited - Products - Switches

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Old 22nd January 2009, 16:34   #2
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It is just a switch to operate air-horn by the "push of a button"(instead of pressing a lever[like seen in buses]) just like operating a regular electric horn. The horn button will be connected to the electro-pneumatic switch.


When the horn button is pressed,the solenoid in the electro-pneumatic switch is energized, causing the valve connected to it to open, which releases compressed air to the horn trumpets.

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Old 22nd January 2009, 16:39   #3
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Hmmm... I have seen such "buttons" near the steering wheels, which in turn control a separate unit hidden away under the hood. I think it is the unit which goes under the hood which is called the "electro pneumatic switch" then?

The "buttion" thingie - have sometimes put it to better use as a push start button. On heavy vehicle, long time back.
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Old 22nd January 2009, 17:11   #4
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Quote:
Originally Posted by BaCkSeAtDrIVeR View Post
I think it is the unit which goes under the hood which is called the "electro pneumatic switch" then?
Yes, the electro-pneumatic switch goes under the hood and close to the air-horn unit.
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Old 23rd January 2009, 15:35   #5
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I've seen cars which is fitted with air horns in which they blow the horn by pressing the steering button like normal stock horns. So that means all those cars are fitted with this switch ?

Anyway, what would be the cost for this switch ?
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