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A stiff drink !!!
M
On Thu, Jan 16, 2020 at 2:09 PM Michael MacLean <rrengineer.mike@att.net>
wrote:
> In an earlier post to another list (MGs) I told how my tach in my 69 GT
> would die when the headlights were turned on. Someone mentioned that the
> tach was looking for a ground through the light wiring for the instrument.
> That turned out to be true, somewhat. To test this I pulled the instrument
> to inspect the wiring and found what you see in the picture. One arrow
> points to the ground connection on the back of the case and the other arrow
> points to a common ground just floating around behind the instrument. For
> an experiment I slipped the ground wire connector over the threaded mouting
> stud of the case back and shoved the tach back into place temporarily to
> find out about the missing ground theory. It worked! You didn't think it
> was going to be that easy did you? The light had not illuminated the
> instrument before either, so after scraping and sanding the bulb hlder and
> the tube fitting on the back of the tach that the bulb shoves into, the
> light worked too, but wait there's more! 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?
> Mike MacLean
>
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">A stiff drink !!!</div><div class=3D"gmai=
l_default" style=3D"font-family:comic sans ms,sans-serif;font-size:small"><=
br></div><div class=3D"gmail_default" style=3D"font-family:comic sans ms,sa=
ns-serif;font-size:small">M<br></div></div><br><div class=3D"gmail_quote"><=
div dir=3D"ltr" class=3D"gmail_attr">On Thu, Jan 16, 2020 at 2:09 PM Michae=
l MacLean <<a href=3D"mailto:rrengineer.mike@att.net";>rrengineer.mike@at=
t.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:=
1ex"><div><div style=3D"font-family:times new roman,new york,times,serif;fo=
nt-size:16px"><div dir=3D"ltr"><div><div dir=3D"ltr">In an earlier post to =
another list (MGs) I told how my tach in my 69 GT would=20
die when the headlights were turned on.=C2=A0 Someone mentioned that the ta=
ch
was looking for a ground through the light wiring for the instrument.=C2=
=A0=20
That turned out to be true, somewhat.=C2=A0 To test this I pulled the=20
instrument to inspect the wiring and found what you see in the picture.=C2=
=A0
One arrow points to the ground connection on the back of the case and=20
the other arrow points to a common ground just floating around behind=20
the instrument.=C2=A0 For an experiment I slipped the ground wire connector=
=20
over the threaded mouting stud of the case back and shoved the tach back
into place temporarily to find out about the missing ground theory.=C2=A0 =
It
worked!=C2=A0 You didn't think it was going to be that easy did you?=
=C2=A0 The=20
light had not illuminated the instrument before either, so after=20
scraping and sanding the bulb hlder and the tube fitting on the back of=20
the tach that the bulb shoves into, the light worked too, but wait=20
there's more!=C2=A0 After this hollow victory I had to use the horn on =
the=20
test drive.=C2=A0 Now the horn does not work, but when I push on the steeri=
ng
wheel stalk to activate the horn, the brake warning light comes on.=C2=A0 =
I=20
just love electrical problems.=C2=A0 Not in my element here.=C2=A0 Any idea=
s?</div>Mike MacLean</div><div><br></div></div></div></div>________________=
_______________________________<br>
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</blockquote></div>
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