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Author Topic: Mystery switch on Aprilia steering column  (Read 565 times)
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John Larkin
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Posts: 25


« on: 20 October, 2020, 03:06:23 PM »

I'm rewiring my 1949 Aprilia berlina from scratch.  There were too many different repairs and bodges just to carry out minor repairs, so I took photos and made notes, and then launched an offensive with wire snips.  I missed noting where the wire from one switch went, and I cannot trace it as many cables were made up of different-coloured wires joined along their length.  The switch looks as it it might be a contemporary after-market device.  It's a lever toggle switch of high quality and has one terminal only.  There are two positions, open and closed.  It completes a circuit through the switch body and the steering column, and so it earths some device.  I suspect that it may be a horn switch.  Does anybody recognise it?    There is logo inside:- CB, and a number:- 928. I've attached two images.

John Larkin.


* Aprilia steering column switch.JPG (184.07 KB, 1600x1200 - viewed 44 times.)

* Inside the switch.JPG (212.5 KB, 1600x1200 - viewed 41 times.)
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John Larkin
1949 Aprilia berlina
simonandjuliet
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Posts: 2281



« Reply #1 on: 20 October, 2020, 06:39:56 PM »

I've seen similar before, but used for dipping lights

I rewired my Cabrio from scratch adding a couple of circuits for modern side/brake lights etc (plus an iPhone charger option as well) - very satisfying

There is a chap in Italy making repro woven wiring that is very nice - takes longer to wire because it's all the same colour , but the end result is great
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S1 Aprilia Cabrio, S2 Aprilia, S2 camioncino, S2 furgoncino, , R4 Sinpar, R4 Rodeo, R60 Tractor,R60 S, Moto Guzzi Ercole, Disco 3, Mini ALL4 JCW, Moto Guzzi Cardellino 63,Fulvia Berlina GT, 2019 Royal Enfield Himalayan
tzf60
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Posts: 125



« Reply #2 on: 21 October, 2020, 11:02:56 AM »

Hi John,
As you've suggested, maybe a horn switch to overcome the delicate original unit that mounts on the steering column? My bakelite unit has already already been repaired.......!!
Is the stalk switch spring-loaded?
 
Regards,
Tim
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1939 Series 1 Aprilia undergoing very slow restoration.....
 
Previous Lancias: 1979 Beta Sedan 2000, 1982 Delta 1500, 1988 Delta 1.3, 1992 Dedra 1.8ie
John Larkin
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Posts: 25


« Reply #3 on: 21 October, 2020, 12:59:20 PM »

Hi Tim,
The switch is not spring-loaded, so I suppose that makes it easier to give long blasts of the horn to annoy other motorists!
Regards,
John.
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John Larkin
1949 Aprilia berlina
Raahauge
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Posts: 54


« Reply #4 on: 21 October, 2020, 07:18:05 PM »

Quite possibly an aftermarket item which the factory adopted with the Ardea, who's horn button can be turned about 30 degrees to lock it on, saves so much effort!
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fay66
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« Reply #5 on: 22 October, 2020, 09:59:29 AM »

Quite possibly an aftermarket item which the factory adopted with the Ardea, who's horn button can be turned about 30 degrees to lock it on, saves so much effort!
Similar mounting to the'Bloster' steering blockers for Fulvia and Flavia, and certainly looks aftermarket fit to me.
Brian
8227 Cool
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Own 1966 Fulvia 2C Berlina since 1997, back on road 11-1999.Known as "Fay"
1999 Suzuki Wagon R+ GL, now my daughters
2006 Renault Megane 1 5 Dci Sports Tourer
Dedra Technical Adviser
John Larkin
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Posts: 25


« Reply #6 on: 24 October, 2020, 06:05:35 PM »

I've concluded that it is a dip switch.  It earths the coil in the headlamp changeover switch.
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John Larkin
1949 Aprilia berlina
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