My hazard lights wouldn't come on and the fuse seemed fine. I brought a new switch for £4.99 inc p&p off ebay and put it on myself. It's easy to do, the panel where the switch sits comes out easily if you just push a knife or something slim into the gap above the switch. Not where the switch sits, just above. Then you just unplug the switch from the wire fitting and pop in your new one.
Jacquie
August 2012