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10-21-2018, 06:29 PM | #1 |
Scooby Newbie
Member#: 349702
Join Date: Mar 2013
Vehicle:2003 WRX PSM |
Hella Supertones only make noise when I release the horn
I installed Hella Supertones only to find that they produce a weak honking noise once I REMOVE my hand from the horn button. The horns are certainly not as loud as they are supposed to be, and I must've wired them up incorrectly.
I am using a 12V 4 pin 30A/40A SPDT standard automotive relay, with a 15 amp fuse in between the positive of my battery and my relay, wired as such: 85 to ground 86 to stock horn wire 30 to positive battery terminal 87 to positive horn terminal Also, this set up is in conjunction with the stock horn relay. As far as my research tells me, this is a very common/correct way of setting up these horns, can someone help me out? I've attached a video showing what happens when I press the horn on my car: https://www.dropbox.com/s/0o4r6isv1q...44416.mp4?dl=0
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10-28-2018, 03:36 PM | #2 |
Scooby Newbie
Member#: 349702
Join Date: Mar 2013
Vehicle:2003 WRX PSM |
Any ideas? I'm stumped!
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10-29-2018, 09:21 PM | #3 |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
Quick look, looks fine.
I can't see your link, could be my iPad though. |
10-30-2018, 01:11 AM | #4 |
Scooby Specialist
Member#: 348254
Join Date: Feb 2013
Chapter/Region:
SCIC
Location: San Diego, CA
Vehicle:2013 WRX SWP |
Have you tested the Hella horns to make sure they both work? Just hook them up to power and ground to make sure they work.
Other quick test would be to use a multimeter on your spade connectors at each horn to make sure you're getting 12V when pressing. |
11-01-2018, 11:59 PM | #5 |
Scooby Newbie
Member#: 349702
Join Date: Mar 2013
Vehicle:2003 WRX PSM |
So I hooked one up directly to the battery, and it just makes a quick chirp when the contact Is made and that's it. I took them apart and they look great, super clean and no corrosion. Plus a horn mechanism is so basic it's hard for it to really degrade besides corrosion. What do you think is the problem at this point? Bad wires?
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11-02-2018, 08:34 AM | #6 | |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
Quote:
If old, there is usually an adjustment screw on the back. |
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11-05-2018, 11:57 PM | #7 |
Scooby Newbie
Member#: 349702
Join Date: Mar 2013
Vehicle:2003 WRX PSM |
Update: when wired and pressing the horn, there is a measured voltage across the horn terminals. Therefore they must be wired correctly, and it's a horn issue. What exactly does the adjustment screw on the back do?
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11-06-2018, 07:43 AM | #8 | |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
Quote:
This cycles fairly fast making sound as the diaphragm moves back and forth. The adjustment screw sets the airgap for the circuit inside. There is a narrow range for good sound. Screw too far in or out not a only can kill the sound, it may make it not work. I would mark the screw head, then only go in or out 1-2 turns max. Just moving it may make things work and you can go back to where you were. Also make sure the ground (usually the mounting bracket) is clean and solid. |
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11-07-2018, 08:40 PM | #9 |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
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11-09-2018, 07:44 PM | #10 |
Scooby Newbie
Member#: 349702
Join Date: Mar 2013
Vehicle:2003 WRX PSM |
That diagram and explanation was very helpful, thanks! So it appears as if the horns are going through a single cycle instead of continually oscillating. Pressing the horn pulls the magnet in, and releasing the horn let's it out, and that's why I hear a little chirp when I release the horn. I've tried adjusting the screw all the way out and all the way in with no change besides a slight change in pitch of the chirp. How small is the acceptable range exactly?
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11-09-2018, 09:08 PM | #11 |
NASIOC Supporter
Member#: 30669
Join Date: Dec 2002
Chapter/Region:
Tri-State
Location: USA, North NJ, 07456
Vehicle:1998 Legacy 2.5GT Silver Sleeper BK, 5MT |
Useful range is small.
Make sure you have a solid connection for power and ground. A poor connection may not allow a good horn to work correctly, a bad horn is even worse. |
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