Keep seeing my fog light indicator on dash instrument panel flickering on , anybody any ideas why ? Loose cable maybe ?

First off, check the fuse, #65, 15A.

The fuse is ok as the rear fog light comes on when switch operated .

I had this problem on a friends fiat,it turned out to be the wrong bulb had been fitted & forced into the bulb holder in the rear light unit,a new bulb fitted correctly solved it,have you had or replaced a bulb recently?