 Old Horns |
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| zoomCat |
 Aug 13 2020, 03:02 PM
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#1
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Member  Group: Members Posts: 181 Joined: 13-August 04 From: Cincinnati, OH Member No.: 2,526 Region Association: None 
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I've got some original Hella horns, original equipment on the car, but they've been silent for 30 odd years. Putting 12 volts across the lugs doesn't do anything.
Modern replacements look all shiny and new, even though it's something nobody else will likely ever see I thought I'd try to bring the originals back to life.  Opening them up they actually look pretty good.   I don't see any broken wires, and the corrosion is minimal. The sprung contact points on the right don't seem to be connected in a way that would allow the thing to move in response to the magnet. Anybody know what I'm looking at here? Any particular diagnostics I can do? |
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| bbrock |
Aug 13 2020, 10:01 PM
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#2
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains
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What are you using for a power source? I haven't messed with my original horn, but when I hooked up my brand new Hella Sharptones to a 12v, 3 amp power supply, I got nothing. When I hooked them to a charged car battery, they about broke my eardrums. I just needed more current to get them moving. Not sure if that applies to the old horns.
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| zoomCat |
Aug 14 2020, 12:16 AM
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#3
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Member Group: Members Posts: 181 Joined: 13-August 04 From: Cincinnati, OH Member No.: 2,526 Region Association: None
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QUOTE(bbrock @ Aug 14 2020, 12:01 AM)  What are you using for a power source? I haven't messed with my original horn, but when I hooked up my brand new Hella Sharptones to a 12v, 3 amp power supply, I got nothing. When I hooked them to a charged car battery, they about broke my eardrums. I just needed more current to get them moving. Not sure if that applies to the old horns. I’m using a 10 amp battery charger. I get nothing when it’s connected. |
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| Superhawk996 |
Aug 14 2020, 06:01 AM
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#4
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914 Guru Group: Members Posts: 6,519 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(zoomCat @ Aug 14 2020, 02:16 AM) I’m using a 10 amp battery charger. I get nothing when it’s connected. Try a battery per @bbrock suggestion. Some battery chargers aren't true DC voltage output. There are some battery chargers that are simply half wave rectifiers and may not drive the electromagnet properly which is looking for a solid 12v DC.  https://lastminuteengineers.com/the-half-wave-rectifier/ |
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Posts in this topic
zoomCat Old Horns Aug 13 2020, 03:02 PM
Superhawk996 Note: I've never played with one of these - ... Aug 13 2020, 03:50 PM dr914@autoatlanta.com our man carson (ex navy seal) restores these horns... Aug 13 2020, 04:06 PM 914werke Ive done a fair # of them your example is a very e... Aug 13 2020, 04:28 PM Retroracer I kept mine (both broken), put aside to tinker wit... Aug 13 2020, 07:50 PM bkrantz When you give it 12 volts, does anything move, eve... Aug 13 2020, 08:06 PM
914werke :agree: Use a car battery. Remove the potting from... Aug 14 2020, 01:46 PM
CHIZ 914 Rich knows! My horns work and look factory new... Aug 14 2020, 11:09 PM |
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