turn signals inoperative

The turn signals (directional indicators) on my 1988 H & E have stoped working. I suspect the flasher unit but have no idea where it is hidden. Any ideas?

Thanks!

Woodburn, not sure if their the same, but on my 95 XJS, on the drivers side, pull the panel under the steering wheel, look for a bracket holding several relays.  Mine relay  is Black on a yellow base.  If you lights come on when you move the turn signal stalk, you may be able to hear, or feel the relay when the lights come on.  As I understand it, there just not flashing like they should.  Hope this helps.  Keith.