On a USA Left hand drive its on the left behind the hinge,On mine the switch is kinda tempermental usually its corrosion on the spade connectors,other times(not offen)its the spade connections behind the light.I had the same trouble long ago & just simply removed the board & looked closly at the connections but did purchase a new one,there inexpensive.VB's are cheaply mfg BUT Moss IS HIGHEST quality.Good Luck.....Ken&Whitelightning.....DON'T throw away the OLD parts!.