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RE: horn wiring to steering wheel

To: Richard Gosling <richard.gosling@exprogroup.com>,
Subject: RE: horn wiring to steering wheel
From: John Hobson <goalie_john@yahoo.co.uk>
Date: Mon, 11 Mar 2002 08:48:15 -0800 (PST)
Mine is a '77 car.  It has the original solid spoke, fake leather plastic
wheel in it.  I just preferred the look and feel of the mountney wheel
and thought I would treat Saskia seeing as she is now back on the road!

I got the boss with the wheel, although I am not sure if it is the
correct one for my car.  The dealer said that he thought it was, but
isn't entirely sure.  I might have a fiddle with it tonight.

I'll look at getting the horn to work too, although I suspect this job
may have to wait a while...

cheers
John
--- Richard Gosling <richard.gosling@exprogroup.com> wrote:
> John,
> 
> I'm afraid not.  The problem is that the Montney horn push assumes your
> wiring works in the following way:
> 
> Battery-----horn-----switch-----earth
> 
> Therefore the switch works by taking the single input wire and
> grounding it
> directly to earth - in this case via the boss to the steering column. 
> This
> worked fine when I fitted a Mountney to the MG BGT I had, as that's how
> its
> horn was wired.
> 
> However, a Spitfire horn is wired:
> 
> Battery-----switch-----horn-----earth
> 
> at least for the late 1500 - earlier cars may be different.  Therefore
> the
> switch needs to have two wires going to it - a live supply from the
> battery,
> and the switched output to the horn.  The Mountney horn push is not
> wired
> this way.
> 
> You may be able to pull the horn push apart and bodge it somehow, but
> it
> will not work directly as it is.  I'd certainly look at it, however - I
> too
> hate having the horn push on the column stalk, I can never find it in
> the
> split second when I really want it!
> 
> BTW, what year is your 1500?  Mine had the original Moto-Lita leather
> wheel
> that Triumph fitted for a couple of years around 1978 (I replaced it
> because
> the leather was falling off in strips!).  The boss for this fits the
> Mountney wheel perfectly, you just have to drill some more holes
> through it
> because the Moto-Lita has 9 bolts while the Montney has 6.  This also
> enables you to retain the delightful original boss cap, with the BL
> logo on
> it (as well as saving 15 quid on a Mountney boss!).
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