75's unknown switch

[Luca <nodoubt@domain.elided>]

On the my 75's ARC (alfa romeo control) there's a switch I don't really know
what's for.
IT's a slide switch (sliding vertically) located on the higher left part
of the ARC, just in the warning lamp panel.  The icon printed over it is 
something like a DOT with some parenthesis, like it was a speaker or
whatever.  
I also got the ARC off the panel and checked inside. This switch is a
bridge over 
two wires going straight to the ARC's motherboard. From there, I can see 2 
printed board lines going to one of the 2 main ARC's plugs. At the end, I saw 
this switch is a bridge between the PINK/WHITE and the GREEN/WHITE wires
arriving 
to ARC's plug.   
Ah, I forgot... the switch connects these 2 wires passing through a lamp on
the
function lights panel:  it's RED and has the same ICON as the switch (it's
placed where the CHOCKE one is on the 1600cc, or where, in other version,
there's the ABS lite)
I tried to activate the switch, but nothing happens. 

Any idea??


nodoubt, 
937 landpilot
A lifetime isn't enough
937RS2, 75 Turbo, RM250


http://www.geocities.com/MotorCity/6818/

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