I have been having a problem with my intermittent wipers ( all other wiper functions operate as normal)... sometimes it is a very brief delay(1 second), sometimes it completes a "double-wipe", and sometimes the delay is 30 seconds or doesnt work at all. Is there a relay (potentially faulty) that controls the wiper delay? Could that be the problem? I have had the car for a year and this has just started. Thanks in advance for ant tips.