[Mgs] Mix n Match

[Michael MacLean]

Paul,
     Not being very well versed in the electronic side of these cars I
cannot dpeak to the single click out of the flasher when the stalk was
moved up or down while the lights did not work.  All I can say is the
lights stopped working when the hazard switch was rocked back and forth a
couple of times.  When I went out yesterday to work the switch again a few
times to see if it might clean off the contacts enough to work, the switch
physically broke up internally.  It jammed in one spot, broken.  It has to
be replaced in any case.  We'll see if the replacement from Moss will solve
the problem.
Mike MacLean

On Mon, Apr 18, 2022, 1:04 AM PaulHunt73 <paulhunt73 at virginmedia.com> wrote:

> The 3-pin flasher was only used on Mk1 cars but the 4-fuse fusebox
> didn't start until the 1970 model year.
>
> The flasher unit should have 12v on the green and light-green/brown
> wires all the time the ignition is on, as well as the common contact of
> the indicator switch.  This lights the lamps as soon as the stalk is
> operated, then the turn flasher 'warms up', clicks and turns them off,
> then further clicks turn them on, off, on, off.  The hazard flasher
> works the other way round i.e. when first operating the switch nothing
> happens for a moment, then after a pause there is a click and the lamps
> light, then further clicks turn them off, on, off, on.
>
> Where hazards were factory provided the 12v ignition feed to the turn
> flasher does go though that switch, and is disconnected when the hazards
> are switched on.  That's to prevent voltage feeding back through the
> turn flasher onto the ignition, including the fuel pump, when the
> ignition is off and the hazards on if the stalk has been left operated
> to one side or the other.  When rarely used the grease inside the
> hazard  switch goes hard and becomes an insulator rather than a
> lubricator, and can affect the hazard lights as well as the turn
> signals.  Sometimes flipping the witch back and fore can restore things,
> but in my case I had to open up the switch, dig out the old grease and
> replace with fresh, and it has been fine ever since.  The original UK
> rocker switches do lend themselves to doing that, can't speak for the
> American switches.
>
> For me the puzzle is still why something was clicking when the lights
> weren't working.
>
> PaulH.
>
> On 18/04/2022 00:32, Michael MacLean wrote:
> > I'm confused. (nothing new) in trying to get my turn signals working I
> > checked the wiring diagrams out for the early and late MGs.  In the
> > wiring diagram for the early cars it shows a 3 pin flasher relay with
> > a two fuse unit.  In the late MG wiring diagram it shows a two pin
> > flasher unit and a four fuse unit.  Looking at my car (a 69) it has a
> > two pin flasher unit, but the car has a two fuse block unit.  What the
> > heck?
> > Mike MacLean
> >
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