Got no blinking lights

WHEN my daughter put the indicator on in my 2006 BF Falcon MkII the other night the lights went out and would not come back on. The parkers and blinkers now work, the high beam works now and then, but there's no low beam. It is only a couple of weeks out of warranty, but Ford has told me I need a new switch that will cost $700. Other Ford owners say it is the wiring. Should I take it to an auto electrician before buying a new switch?