Relays are electrical switches which use a small amount of current in order to switch a larger current on.
When relays engage no matter how small they are they always make a ticking noise. As far as I understand the relays are hosed under the steering column area in a hidy hole, if you can find them then all you would need to do is listen or even better place your finger on each relay and you'll soon feel if it's ticking in time with the noise you canm hear. If it is the relay ticking then the next question comes is, is it the relay or a wiring fault....and for this I would say sit in the car and lock it so that almost everything is powered down, you know interior lights, windows etc. and then see if the ticking is still their or not, if it still ticks then it may well be wiring, if not then is most likely just a relay.
Having said all of the above it does depend on the type of ticking and the location...amongst many other things.
