hi,

could this be so?

when the clicking can be heard the indicator lights on the dash and on the
car are not blinking...

You can also try removing the switch and squirting contact cleaner
or WD40 in through one of the holes as you wiggle it around.

I had pretty much resigned myself to getting a new one when
the problem kept coming back, so I had a go at taking the
switch apart as I had nothing to lose.

I was half expecting it to come apart in a shower of springs
and bits of metal that I wouldn't be able to get back in place,
but it turns out to be remarkably simple inside.

The trickiest bit is getting the top off, you have to lever off
the four clips with a screwdriver without breaking them. Once
inside, there are 3 flat metal contacts on the right which you
need to clean. There is also a spring loaded contact on the end
of the arm which might need cleaning, or if badly worn out of
shape might need the lips that have formed filed down.

When you put the switch back together, make sure the sector gear
which controls the headlights engages properly, and then clip
the top back on.

   -Mark