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post #1 of 17 (permalink) Old 03-21-2012, 09:04 AM Thread Starter
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Horn relay question

Hey guys,

A quick question regarding horn relays, I know if mounting a horn with a compressor we need to use a relay, but what if we are using a non compressor type horn? Like these:



Would I still need a relay?

-Vinny VROC #32287 - 2007 Vulcan 900 Custom, Ness Big Sucker, Fi2000R, Cobra 2-into-1

The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because they are worth believing in.

Last edited by truckie453; 03-21-2012 at 09:18 AM.
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post #2 of 17 (permalink) Old 03-21-2012, 09:40 AM
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No, unless these new horns are really big current sinks. The only time you need a relay is if the original source could not supply enough current. The relay would be activated by the original low power source and then the horn would connect to a higher current source through the relay.
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post #3 of 17 (permalink) Old 03-21-2012, 09:42 AM
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...and... What types of horns are those? dB output? Current draw?

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post #4 of 17 (permalink) Old 03-21-2012, 10:11 AM
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I believe those are FIAMM electronic horns, draws 5 amps, if you use one you are good to go. Two will fry the horn button and blow the fuse. I use one highway blaster. dB output is rated at 129, not as loud as the air horns but will supprise lots of people.

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post #5 of 17 (permalink) Old 03-21-2012, 10:59 AM Thread Starter
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The horns are Hella Supertones, here is a link and specs. It shows 5.5A per horn, if I use just one I should be ok right? I believe the OE fuse is 10A... (thanks for the help electric confuses me)

http://cat.hella.com/hella-nafta/upl...structions.pdf


part number 3AF 003 399-051
Materialtext HORN S-TONE 12V 500HZ HTONE
Catalogue Section Electric
Nominal Voltage [V] 12V
Wattage [W] 78
Frequency [Hz] 500
Sound Level [Db (A)] 116
Torque of Bracket [Nm] 10 - 15
Weight [Kg] 0.59
Amperage [A] 6.5
Housing Black Coated Metal
Black Protective Grille
Feature 83 mm Bracket
Brand Name Hella
Package Quantity 1
Country Of Origin DE
UPC code 760687056713
Package - Length [In.] 5.62991
Package - Height [In.] 4.92125
Package - Width [In.] 3.74015
Package - Weight [Lbs.] 1.300714
Product Description (long) Supertone High-Tone, 12 V, 500 Hz with Bracket
UPC Code 760687056713

-Vinny VROC #32287 - 2007 Vulcan 900 Custom, Ness Big Sucker, Fi2000R, Cobra 2-into-1

The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because they are worth believing in.

Last edited by truckie453; 03-21-2012 at 11:04 AM.
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post #6 of 17 (permalink) Old 03-21-2012, 11:33 AM
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[QUOTE=truckie453;194610]The horns are Hella Supertones, here is a link and specs. It shows 5.5A per horn, if I use just one I should be ok right? I believe the OE fuse is 10A... (thanks for the help electric confuses me)

http://cat.hella.com/hella-nafta/upl...structions.pdf


Looks like these are big on current. Spec says they are 6.5A each. Use one you are ok. If you are using two then you will have to use a relay rated for the higher current. Use your horn button to activate the relay and run a separate bigger wire from battery to the horns through the relay. I would also use an in-line fuse to be safe, maybe 15A.
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post #7 of 17 (permalink) Old 03-21-2012, 11:41 AM
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Quote:
Originally Posted by truckie453 View Post
The horns are Hella Supertones, here is a link and specs. It shows 5.5A per horn, if I use just one I should be ok right? I believe the OE fuse is 10A... (thanks for the help electric confuses me)

http://cat.hella.com/hella-nafta/upl...structions.pdf


part number 3AF 003 399-051
Materialtext HORN S-TONE 12V 500HZ HTONE
Catalogue Section Electric
Nominal Voltage [V] 12V
Wattage [W] 78
Frequency [Hz] 500
Sound Level [Db (A)] 116
Torque of Bracket [Nm] 10 - 15
Weight [Kg] 0.59
Amperage [A] 6.5
Housing Black Coated Metal
Black Protective Grille
Feature 83 mm Bracket
Brand Name Hella
Package Quantity 1
Country Of Origin DE
UPC code 760687056713
Package - Length [In.] 5.62991
Package - Height [In.] 4.92125
Package - Width [In.] 3.74015
Package - Weight [Lbs.] 1.300714
Product Description (long) Supertone High-Tone, 12 V, 500 Hz with Bracket
UPC Code 760687056713

Sorry FIAMM makes some that look almost the same.
Yes use one horn and you are good. I use the low tone. You can use the relay to supply two horns which will raise the dB level a little, use one low tone and one high tone and it really gets noticed.

Still not as loud as an air horn. But sounds good and gets attention.

John
"I am a modern cowboy, on a steel horse I ride"
09 VN900 Classic
Big 3 +++++
Double Darkside
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post #8 of 17 (permalink) Old 03-21-2012, 11:54 AM Thread Starter
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Quote:
Originally Posted by Bytehead View Post
Sorry FIAMM makes some that look almost the same.
Yes use one horn and you are good. I use the low tone. You can use the relay to supply two horns which will raise the dB level a little, use one low tone and one high tone and it really gets noticed.

Still not as loud as an air horn. But sounds good and gets attention.
Thanks!

FWIW I don't necessarily need to use the hellas, good to know that fiamm makes a set too.

-Vinny VROC #32287 - 2007 Vulcan 900 Custom, Ness Big Sucker, Fi2000R, Cobra 2-into-1

The things that may or may not be true are the things a man needs to believe in the most. People are good; honor, courage, virtue mean everything; power and money mean nothing; good always triumphs over evil; true love never dies. A man should believe in those things, because they are worth believing in.
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post #9 of 17 (permalink) Old 03-21-2012, 11:59 AM
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Just a thought the FIAMM HIGHWAY BLASTER is available at most auto parts store for around 15.00. Standard replacement horn for many cars. Just drop in and pick one up.

John
"I am a modern cowboy, on a steel horse I ride"
09 VN900 Classic
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post #10 of 17 (permalink) Old 03-21-2012, 07:44 PM
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This is the WebBike mag comparison of the FIAMM, HELLA SUPERTONE, AND THE STEBEL AIR HORN. Hella actually was rated the loudest of the three.

Just some light reading. Good info though and great sound recordings.

http://www.webbikeworld.com/motorcyc...eeway-blaster/

John
"I am a modern cowboy, on a steel horse I ride"
09 VN900 Classic
Big 3 +++++
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