i've got an 89 f-150 with the 351. about a month ago the light switch quit working right. when you pull it all the way out only the headlights come on and when you put it on park nothing comes on. in between "headlight" and "parklight" there is a sweet spot in which everything comes on. i've bought numerous switches for it and still it's doing the same thing. i have absolutely no idea what the problem is, quite frankly it makes no sense to me at all. Help me

 

Where are you getting these switches? Did you inspect the connector? They're known to burn the terminals off; especially on the feed for the parking lights.