No headlights but has parking lights

First time in 10 years the headlights have given me a problem, tried to throw the lights on this morning and didn't get anything but the parking lights. directionals work as they should also. Quickly checked for any loose connections but had to head into work so had to leave it. Is this more than likely the pull switch, or is there something else I should check out when I get home? Thanks in Advance.