lights will not work on low beam,quit working suddenly ,high beam still works.

Have you checked both bulbs? Perhaps the bulbs have blown. If you have no power to the bulbs there is a possibility that the light switch is bad. May need to trace a wiring diagram and follow test procedures for the switch. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online