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I have to say that's exactly what I expected for the tach.
Whilst the other could be an earth problem, it could also be a 12v =
supply problem. But there are reasons I won't go into that make a =
single fault in either of those an unlikely cause, more likely that =
there are two related problems.
The easiest thing is to diagnose the horn circuit, and see where that =
takes you. At the horn terminals you should see 12v on both the purple =
and purple terminals of the horn, leave all wiring connected to their =
terminals. When the horn button is pressed, on a working circuit, the =
purple terminal will stay at 12v whereas the purple/black terminal will =
drop to zero volts. =20
With a non-working horn if the purple drops to zero then the problem =
lies back towards the fusebox, bad connections at the fuses and the =
spades are not uncommon.
But if both terminals stay at 12v then the problem lies back towards the =
horn button.
PaulH.
----- Original Message -----=20
...
After this hollow victory I had to use the horn on the test drive. =
Now the horn does not work, but when I push on the steering wheel stalk =
to activate the horn, the brake warning light comes on. I just love =
electrical problems. Not in my element here. Any ideas?
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<DIV><FONT size=3D2>I have to say that's exactly what I expected for the =
tach.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Whilst the other could be an earth problem, it =
could also=20
be a 12v supply problem. But there are reasons I won't go into =
that make a=20
single fault in either of those an unlikely cause, more likely =
that=20
there are two related problems.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>The easiest thing is to diagnose the horn circuit, =
and see=20
where that takes you. At the horn terminals you should see =
12v on=20
both the purple and purple terminals of the horn, leave all wiring =
connected to=20
their terminals. When the horn button is pressed, on a working =
circuit,=20
the purple terminal will stay at 12v whereas the purple/black terminal =
will drop=20
to zero volts. </FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>With a non-working horn if the purple drops to zero =
then the=20
problem lies back towards the fusebox, bad connections at the fuses =
and the=20
spades are not uncommon.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>But if both terminals stay at 12v then the problem =
lies back=20
towards the horn button.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>PaulH.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; =
PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><B></B> </DIV>
<DIV=20
style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: =
black"><STRONG>...</STRONG></DIV>
<DIV=20
style=3D"FONT-FAMILY: times new roman, new york, times, serif; =
FONT-SIZE: 16px"=20
class=3Dyahoo-style-wrap>
<DIV dir=3Dltr data-setdir=3D"false">After this hollow victory I had =
to use the=20
horn on the test drive. Now the horn does not work, but when I =
push on=20
the steering wheel stalk to activate the horn, the brake warning light =
comes=20
on. I just love electrical problems. Not in my element =
here. =20
Any ideas?</DIV></DIV></BLOCKQUOTE></BODY></HTML>
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