I would like to know what type of noise does, is it a faster than normal sound? Is it like the buzz of a fly?
When does the intermission on one side give?
do it always?
Only with the right, only with the left?
For the rest I do not think it is difficult for you to change it, but first of all say that it is not in the steering wheel, but under the left on the pedals, next to the command where the hood opens.
That the relay is square and that apart from distinguishing it by noise (give the doubles and put your fingers on top of the relays, where you notice vibration is what you are looking for) you will distinguish it because it has three terminals instead of four like the others.
Anyway, you can do experiments in the scrapping, in the Citroën Xantia that are there to see how the tapas, the relays go, take a few relays in your pockets just in case ... MANGAR Fuses, bulbs ... in short, take back and learn before fucking something by their own car.
I hope I have helped you.