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spacebiscuit
Samba Member
Joined: March 11, 2016
Posts: 368
Location: UK
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 Posted: Tue Jun 05, 2018 5:23 am Post subject: Another horn earth tab question |
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Yesterday i saw a thread asking about repair of the horn earth tab.
I've recently had my steering column out and I'm now re-fitting the entire dash. When I had the column out I thought that I saw the tab bent outwards. In some photos it appears bent inwards and in others straight down. For example - bent 'in'
Can anyone confirm the correct position, a photo to confirm would be very helpful. I've searched the archive for "horn tab" but cannot find anything that doesn't look like a repair.
Also to confirm the tab is simply where the horn's earth connect since the entire column is an earth, is that correct?
Thanks in advance |
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SGKent 
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Tue Jun 05, 2018 5:26 am Post subject: Re: Another horn earth tab question |
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regardless of the correct position when you try to change that tab it will break off.
Photos from gallery
_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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| Posted: Tue Jun 05, 2018 7:44 am Post subject: Re: Another horn earth tab question |
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1968-middle of 74
The steering Tube was + positive and the Shaft was - earth.
Horn All |
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kreemoweet
Samba Member
Joined: March 13, 2008
Posts: 3900
Location: Seattle, WA
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| Posted: Tue Jun 05, 2018 8:40 am Post subject: Re: Another horn earth tab question |
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| Tcash wrote: |
1968-middle of 74
The steering Tube was + positive and the Shaft was - earth. |
This is not correct. The tube and shaft are electrically connected, so they will either be both + or both -.
Although the tube/shaft are on the "ground" side of the horn, the switch for the circuit (the horn button) is "downstream"
from the tube/shaft. This means that when the horn is not sounding, the tube/shaft is "hot, i.e. at "12" volts, and when the horn button is
pressed, the tube/shaft will be grounded, i.e at or near "0" volts.
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SGKent
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Tue Jun 05, 2018 8:54 am Post subject: Re: Another horn earth tab question |
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| kreemoweet wrote: |
| Tcash wrote: |
1968-middle of 74
The steering Tube was + positive and the Shaft was - earth. |
This is not correct. The tube and shaft are electrically connected, so they will either be both + or both -.
Although the tube/shaft are on the "ground" side of the horn, the switch for the circuit (the horn button) is "downstream"
from the tube/shaft. This means that when the horn is not sounding, the tube/shaft is "hot, i.e. at "12" volts, and when the horn button is
pressed, the tube/shaft will be grounded, i.e at or near "0" volts. |
both TCash and your statement are the same. Are we arguing semantics. 
_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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| Posted: Tue Jun 05, 2018 9:17 am Post subject: Re: Another horn earth tab question |
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| kreemoweet wrote: |
| Tcash wrote: |
1968-middle of 74
The steering Tube was + positive and the Shaft was - earth. |
This is not correct. The tube and shaft are electrically connected, so they will either be both + or both -.
Although the tube/shaft are on the "ground" side of the horn, the switch for the circuit (the horn button) is "downstream"
from the tube/shaft. This means that when the horn is not sounding, the tube/shaft is "hot, i.e. at "12" volts, and when the horn button is
pressed, the tube/shaft will be grounded, i.e at or near "0" volts. |
My mistake the tube is hot and the brown wire that runs through the shaft is ground earth.
Thank you
Tcash |
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