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> 1973 Horn Don’t work
MiniStevieG
post Feb 5 2019, 01:51 PM
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Getting my new whip ready for inspection and discovered my horn has issues. The horn was disconnected from the bumper and now I know why. It won’t stop blowing when I hook the wire back up to the actual horn. I removed the horn assembly on the steering wheel and and for obvious reasons it stops because the mechanism is no longer grounded. I tested the ground wire on the steering wheel and can hear the relay clicking when I disconnect the actual horn so all is good with that. Everything makes sense up till now. Problem is, when I connect the ground wire the assembly and attach it to the steering wheel the horn won’t stop honking. I assume it’s staying grounded when I hook it up. Been troubleshooting it for a little while and I’m wondering what the issue might be. Any thoughts?

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mepstein
post Feb 5 2019, 03:18 PM
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You have the correct pieces for the horn pad.
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MiniStevieG
post Feb 5 2019, 03:53 PM
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QUOTE(mepstein @ Feb 5 2019, 03:18 PM) *

You have the correct pieces for the horn pad.


The only thing I didn't see was the contact button but not sure if the batwing horn had one. Any advice is appreciated. Thanks!!
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mepstein
post Feb 5 2019, 04:41 PM
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QUOTE(MiniStevieG @ Feb 5 2019, 04:53 PM) *

QUOTE(mepstein @ Feb 5 2019, 03:18 PM) *

You have the correct pieces for the horn pad.


The only thing I didn't see was the contact button but not sure if the batwing horn had one. Any advice is appreciated. Thanks!!

That pad is for a 72-76. So unless you have a 70-71, there in no button, There should be a brown wire that connects to the little metal tab at the back of the pad.
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1adam12
post Feb 5 2019, 04:52 PM
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If you do have the correct horn pad just make sure it isn't installed upside down. This will cause the horn to make contact due to mis-alignment. Also do an inspection of that rubber boot for cracks.
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Dave_Darling
post Feb 5 2019, 05:37 PM
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First--when you move the wire up the steering column so that the connector on the end is not touching a ground, does the horn still sound? If it does, you have a short somewhere and need to find it.

If that stops the horn from sounding then the circuit is probably OK.

Check for electrical connectivity between the inner metal part visible in your photo and the outer metal part that has the tab in it. There should be ZERO connectivity, infinite resistance. If you have a short there, that is the cause of the horn sounding.

There should be plastic spacers and washers between the inner and outer metal parts there. If someone put metal washers in, the screws will make contact with both and will cause them to be electrically connected together.

Lastly, make sure that the wire doesn't get pinched against any metal bits when you put the button back on the wheel, and that the rubber "boot" actually pushes the button away from the steering wheel when you're not pushing it down.

--DD
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Rand
post Feb 5 2019, 08:54 PM
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Make your brakes louder?
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MiniStevieG
post Feb 6 2019, 03:22 PM
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QUOTE(Rand @ Feb 5 2019, 08:54 PM) *

Make your brakes louder?


Haha!! Man I’ve been trying every combination for the inside parts of the horn assembly and no luck. The rubber boot does seem a bit worn and the plastic has hardened and I’m wondering if this may be the issue.
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MiniStevieG
post Feb 6 2019, 03:49 PM
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QUOTE(Dave_Darling @ Feb 5 2019, 05:37 PM) *

First--when you move the wire up the steering column so that the connector on the end is not touching a ground, does the horn still sound? If it does, you have a short somewhere and need to find it.

If that stops the horn from sounding then the circuit is probably OK.

Check for electrical connectivity between the inner metal part visible in your photo and the outer metal part that has the tab in it. There should be ZERO connectivity, infinite resistance. If you have a short there, that is the cause of the horn sounding.

There should be plastic spacers and washers between the inner and outer metal parts there. If someone put metal washers in, the screws will make contact with both and will cause them to be electrically connected together.

Lastly, make sure that the wire doesn't get pinched against any metal bits when you put the button back on the wheel, and that the rubber "boot" actually pushes the button away from the steering wheel when you're not pushing it down.

--DD


Thank you! The horn only sounds when I make contact with the ground wire so it is working. I’m not seeing plastic spacers in this assembly and did some research on it. I also don’t see where others have plastic spacers unless I’m missing something. I’ll keep researching. May just have to break down and buy another steering wheel with a horn that works to pass inspection in the meantime then work on my old one.
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bbrock
post Feb 6 2019, 04:52 PM
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QUOTE(MiniStevieG @ Feb 6 2019, 02:49 PM) *

QUOTE(Dave_Darling @ Feb 5 2019, 05:37 PM) *

First--when you move the wire up the steering column so that the connector on the end is not touching a ground, does the horn still sound? If it does, you have a short somewhere and need to find it.

If that stops the horn from sounding then the circuit is probably OK.

Check for electrical connectivity between the inner metal part visible in your photo and the outer metal part that has the tab in it. There should be ZERO connectivity, infinite resistance. If you have a short there, that is the cause of the horn sounding.

There should be plastic spacers and washers between the inner and outer metal parts there. If someone put metal washers in, the screws will make contact with both and will cause them to be electrically connected together.

Lastly, make sure that the wire doesn't get pinched against any metal bits when you put the button back on the wheel, and that the rubber "boot" actually pushes the button away from the steering wheel when you're not pushing it down.

--DD


Thank you! The horn only sounds when I make contact with the ground wire so it is working. I’m not seeing plastic spacers in this assembly and did some research on it. I also don’t see where others have plastic spacers unless I’m missing something. I’ll keep researching. May just have to break down and buy another steering wheel with a horn that works to pass inspection in the meantime then work on my old one.


Unscrew the three screws in your pic. There should be three plastic washers to isolate the inner puck with the springs that clip onto your wheel from the larger metal base that the ground wire connects to. If they are missing, you'll be completing the ground circuit as soon as the horn pad is clipped onto the wheel and the horn will go beep. You can just go to the hardware store and pick up some plastic washers to insert there. The goal is to have metal to metal contact between those two pieces only when the horn pad is pressed. I'm betting that's the problem, but if not, the rubber spring cup being worn out would be the next suspect.
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MiniStevieG
post Feb 7 2019, 12:21 AM
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QUOTE(bbrock @ Feb 6 2019, 04:52 PM) *

QUOTE(MiniStevieG @ Feb 6 2019, 02:49 PM) *

QUOTE(Dave_Darling @ Feb 5 2019, 05:37 PM) *

First--when you move the wire up the steering column so that the connector on the end is not touching a ground, does the horn still sound? If it does, you have a short somewhere and need to find it.

If that stops the horn from sounding then the circuit is probably OK.

Check for electrical connectivity between the inner metal part visible in your photo and the outer metal part that has the tab in it. There should be ZERO connectivity, infinite resistance. If you have a short there, that is the cause of the horn sounding.

There should be plastic spacers and washers between the inner and outer metal parts there. If someone put metal washers in, the screws will make contact with both and will cause them to be electrically connected together.

Lastly, make sure that the wire doesn't get pinched against any metal bits when you put the button back on the wheel, and that the rubber "boot" actually pushes the button away from the steering wheel when you're not pushing it down.

--DD


Thank you! The horn only sounds when I make contact with the ground wire so it is working. I’m not seeing plastic spacers in this assembly and did some research on it. I also don’t see where others have plastic spacers unless I’m missing something. I’ll keep researching. May just have to break down and buy another steering wheel with a horn that works to pass inspection in the meantime then work on my old one.


Unscrew the three screws in your pic. There should be three plastic washers to isolate the inner puck with the springs that clip onto your wheel from the larger metal base that the ground wire connects to. If they are missing, you'll be completing the ground circuit as soon as the horn pad is clipped onto the wheel and the horn will go beep. You can just go to the hardware store and pick up some plastic washers to insert there. The goal is to have metal to metal contact between those two pieces only when the horn pad is pressed. I'm betting that's the problem, but if not, the rubber spring cup being worn out would be the next suspect.


Okay great I understand thank you. Yes in fact the plastic washers are missing between the baseplate and the spring puck. I’ll give it a shot and report back. This is my final task to get the 914 ready for inspection.
Cheers!!
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Dave_Darling
post Feb 7 2019, 03:55 PM
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Also plastic washers under the screw heads. Otherwise there may be a ground path through the screws.

Originally the plastic things were sleeves to make sure the screws didn't touch the metal bit they were holding on...

--DD
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no1uno
post Feb 7 2019, 04:28 PM
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Sorry, I couldn't resist...

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MiniStevieG
post Feb 10 2019, 10:39 PM
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QUOTE(bbrock @ Feb 6 2019, 04:52 PM) *

QUOTE(MiniStevieG @ Feb 6 2019, 02:49 PM) *

QUOTE(Dave_Darling @ Feb 5 2019, 05:37 PM) *

First--when you move the wire up the steering column so that the connector on the end is not touching a ground, does the horn still sound? If it does, you have a short somewhere and need to find it.

If that stops the horn from sounding then the circuit is probably OK.

Check for electrical connectivity between the inner metal part visible in your photo and the outer metal part that has the tab in it. There should be ZERO connectivity, infinite resistance. If you have a short there, that is the cause of the horn sounding.

There should be plastic spacers and washers between the inner and outer metal parts there. If someone put metal washers in, the screws will make contact with both and will cause them to be electrically connected together.

Lastly, make sure that the wire doesn't get pinched against any metal bits when you put the button back on the wheel, and that the rubber "boot" actually pushes the button away from the steering wheel when you're not pushing it down.

--DD


Thank you! The horn only sounds when I make contact with the ground wire so it is working. I’m not seeing plastic spacers in this assembly and did some research on it. I also don’t see where others have plastic spacers unless I’m missing something. I’ll keep researching. May just have to break down and buy another steering wheel with a horn that works to pass inspection in the meantime then work on my old one.


Unscrew the three screws in your pic. There should be three plastic washers to isolate the inner puck with the springs that clip onto your wheel from the larger metal base that the ground wire connects to. If they are missing, you'll be completing the ground circuit as soon as the horn pad is clipped onto the wheel and the horn will go beep. You can just go to the hardware store and pick up some plastic washers to insert there. The goal is to have metal to metal contact between those two pieces only when the horn pad is pressed. I'm betting that's the problem, but if not, the rubber spring cup being worn out would be the next suspect.


Yep that was it. Picked up some nylon washers similar to the ones pictured. Put it all back together and works like a charm. Thank you for your help!!
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76-914
post Feb 12 2019, 10:59 AM
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You won't regret changing out that worn rubber puck either. Pelican Parts and others still sell the factory OEM puck. Makes a big difference in how that horn "feels" to the touch. (IMG:style_emoticons/default/beerchug.gif)
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isdyl
post May 13 2019, 08:18 AM
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Hi - sorry to open up this thread again but I'm having a similar problem. I have all the bits (I think) in the diagram, but I can't work out how they go together. I have a spring button rather than the spade connector but all else looks similar. I can't see where the rubber cuff sits, and also can't see how the two discs can be made to contact if there's a nylon washer between them? Is there an exploded diagram of this arrangement anywhere please? Any help much appreciated! Thanks, Dylan


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Dave_Darling
post May 13 2019, 05:26 PM
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Check the first picture in this thread. That's how the pad goes together. The narrow end of the rubber part just pushes into the hole in the center of it.

The two metal rings don't make contact; that is what the plastic washers and sleeves are for.

The one furthest away from the surface of the horn "button" touches the actual wheel itself. The other one doesn't, until you push the horn button. That's when the one that is closer to the surface of the button touches the upper part of the steering wheel, completing the circuit.

I do not know how the plunger-style early button fits in with this, though. I'm only familiar with the ~72+ (73+?) style.

--DD
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mepstein
post May 13 2019, 05:33 PM
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QUOTE(Dave_Darling @ May 13 2019, 07:26 PM) *

Check the first picture in this thread. That's how the pad goes together. The narrow end of the rubber part just pushes into the hole in the center of it.

The two metal rings don't make contact; that is what the plastic washers and sleeves are for.

The one furthest away from the surface of the horn "button" touches the actual wheel itself. The other one doesn't, until you push the horn button. That's when the one that is closer to the surface of the button touches the upper part of the steering wheel, completing the circuit.

I do not know how the plunger-style early button fits in with this, though. I'm only familiar with the ~72+ (73+?) style.

--DD

Same way. You just don’t have a horn wire. Top of plunger touches flat ring instead of attached to a tab by the wire.
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Larmo63
post May 13 2019, 06:21 PM
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I've futzed around with the tiny wire you have to connect on these quite a few times.

Bad design by Porsche on this, totally archaic.
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mepstein
post May 13 2019, 06:52 PM
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QUOTE(Larmo63 @ May 13 2019, 08:21 PM) *

I've futzed around with the tiny wire you have to connect on these quite a few times.

Bad design by Porsche on this, totally archaic.

Was the wire a porsche design. The early cars 70-71 use a plunger like the 911's. I thought the wire was VW like the mid-late columns.
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