Yesterday my indicators stopped working. I pulled the fuse, it was fine, after putting it back they worked for about ten minutes and then stopped. I located the flasher unit and when I turn the indicators on I can hear it kick into life, but it doesn't click and the bulbs don't light up. Is this likely to be the flasher unit itself that has stopped functioning? It's the 25730 1f500 unit which looks like it can be picked up for a tenner third party or £150 from Nissan