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<DIV><FONT size=2>Ah, this is the tell-tales that are the wrong way round?
Looking at the diagram your switch does indeed seem to be incorrect, but surely
the simplest way to deal with that is swap over the light-green/blue
and light-green/yellow wires where the switch connects to the main
harness? Unless both tell-tales come out of the harness together it
shouldn't be possible to get them reversed on the dash. </FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>The switch is designed this way because MG decided to
use separate tell-tales for left and right, and the flasher units at the
time needed a third terminal to flash the tell-tales, so that third wire
has to be switched as well. Triumph used a single tell-tale, so the
third terminal was simply wired to the light. Later on when the flasher
units were designed to flash both the corners of the car and the tell-tales from
one output terminal, the tell-tales were simply wired in parallel with the main
lights.</FONT></DIV>
<DIV><FONT size=2></FONT><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>But I don't understand why the flasher unit ticks when neither
of the main bulbs light on the green/white side. The only way it can do that is
if there is some path to earth when the switch is operated to that side.
Either it is connected to some other circuit on the car, or the switch is
faulty. Disconnect the green/white wire and see if it still ticks.
If it doesn't then there is some problem in the green/white circuit out to
the lamps. As a test swap over the green/white and green/red wires
and see which side works then. A<FONT size=2>s another check if you
connect 12v to the green/white do the corners of the car light
then?</FONT></FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>If it still ticks with the green/white disconnected then
disconnect the light-green/brown wire and see if it ticks then. If it
doesn't then there is a fault inside the switch. I can't see any
possibility for the flasher unit still ticking with the light-green/brown
wire disconnected.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>As one pair of wires may be incorrect, then maybe
there are other incorrect colours as well, and you will have to check the
continuity of all the circuits.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Black should be connected to light-green/yellow when
switched to the left, and to light-green/blue when switch to the right, but
these are already suspect.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Light-green/brown should be connected to green/red
when switch to the left and green/white when switched to the
right.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>If you have a headlamp flasher then brown is connected to
blue/white.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>As well as checking each wire is connected to wherever it is
supposed to be connected to, you have to check it isn't connected to anything
else, and that includes when the switch isn't operated. So you have to
test each wire against every other wire, with the switch not operated, then
operated to the left, then operated to the right. Make a chart of which
wire shows continuity to which other wire or wires, you will never
remember. Maybe one of the tell-tale wires has been reversed with one of
the main wires.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>PaulH.</FONT></DIV></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=mgs@autox.team.net href="mailto:mgs@autox.team.net">Max Heim via
Mgs</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=mgs@autox.team.net
href="mailto:mgs@autox.team.net List">mgs@autox.team.net List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, July 30, 2018 5:31 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Mgs] Was: coil; now wiring
issues</DIV>
<DIV><BR></DIV>
<DIV
style="WORD-WRAP: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space">The
wiring diagram shows an LG/U wire from the switch to the RH indicator, and
LG/Y to the LH indicator. When connected this way, the RH indicator flashes
when the switch is left, and vice versa. Looking at the naked switch, these
wires are clearly originating on the “wrong side” — the LG/Y is on the same
side of the unit as the G/W which leads to the RH lamps, so it can’t possibly
operate the LH indicator, and so forth.
<DIV><BR></DIV>
<DIV>But I can’t determine if the mistake is in the part or in the labels in
the diagram, since all one has to do is unplug the lamp and move it to the
opposite socket in order to make the colors match up. This part is at least 15
years old so it is not eligible for returns. I don't know why I didn’t notice
the discrepancy when I installed it in the old car. Possibly I assumed I had
the lamps installed incorrectly and just swapped them without checking
colors.</DIV>
<DIV><BR></DIV>
<DIV>The flasher works — when the switch is left the indicator and both lamps
function correctly. When the switch is right, the indicator flashes but the
lamps do not. Bulbs are confirmed good. Presumably the grounds at the lamp
units are good because the taillights and running lights work.</DIV>
<DIV><BR></DIV>
<DIV>I was saying it had to be a fault in the switch because I can’t find any
voltage anywhere on the G/W wire, not even where it exits the switch — on the
back side of the rivet that is the contact point. This is despite the fact
that it is located adjacent to the contact for the LG/Y to the indicator,
which works, and is supposed to be switched simultaneously. I have been
checking this with a test lamp as my digital multimeter will not show any
reading on the flasher circuit.</DIV>
<DIV><BR></DIV>
<DIV>It occurs to me that if I jumpered the two contacts with some solder on
the wire-exit side, they would “have” to function simultaneously. This could
be a possible solution. I can’t think of any reason why they would need to be
independent (but then, why were they built that way in the first
place?).</DIV>
<DIV><BR>
<DIV>
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<DIV style="MARGIN: 0px; FONT-SIZE: 13px">--</DIV>
<DIV style="MARGIN: 0px; MIN-HEIGHT: 16px; FONT-SIZE: 13px">Max Heim</DIV>
<DIV style="MARGIN: 0px; FONT-SIZE: 13px">'66
MGB</DIV></DIV></DIV></DIV></DIV></DIV></BLOCKQUOTE></BODY></HTML>