how can i fix my nissan primera?

i`ve got an 02 nissan primera,when i indicate there is a loud bleeping noise instead of the usual quiet ticking noise to tell you the indicator is still on.The fault is intermittent and sometimes there is no ticking noise or the unwanted bleeping noise.The indicators themselves are working fine regardless of whether the faulty bleep is occuring or not.Would appreciate any feedback.

Many thanx