[Healeys] Not Healey, but Relevant

[Michael Salter]

A stiff drink !!!

M

On Thu, Jan 16, 2020 at 2:09 PM Michael MacLean <rrengineer.mike at 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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