That would need two wires going through the stalk, they would have to be
pretty thin, and the horns take quite a lot of current. I was under the
impression that the earth for the switch was fed up the metal tube of the
stalk, meaning only one wire - purple/black - coming down and going out to
the horns. The main colour of purple indicates it is controlling a device
connected to the fused, always live supply, and the tracer colour of black
indicates that an earth is connected to operate the device. Generally
speaking when a wire colour was first used that was the convention, although
if there were subsequent changes, as from 77 when the horns *were* backed by
an earth instead of 12v, they kept the colour of the controlling wire.
PaulH.
----- Original Message -----
>I have a '69 MGB, with a stalk switch and the ground is at the horns.
>Guess I should have said, "On my '69................" Agree that the
>wiring diagrams may contain a few errors. :-)
>
> CR
>
> CR
> On 8/30/2012 2:49 AM, PaulHunt73 wrote:
>> Not even most negative grounds. The earth wasn't at the horns and 12v
>> from the switch until the 77 year (although some schematics don't even
>> show it that way then). Until then the earth always came from the
>> switch, picked up from the column shaft for the wheel centre button
>> except for the 1970 year when it was wired to the column stalk switch.
>>
>> PaulH.
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