ok first of all, welcome to FordForums, and now to fix the light problem...
Originally Posted by Joe1989
The interior light fails to come on when you open the doors. But comes on when you slid the switch along. But it dosnt work when the doors are opened in any switch mode ect. I'v tryed them all.
in the door jam there should be a little button type switch. check it. if it is broken, replace it. and ur problem should be no more. it may also be a connection problem in the doorjam switch, so id replace it anyway. its only about $3 so id do it just incase. now make sure the light switch is on the "door" option. otherwise it wouldnt work anyway.
u can get the door jam switch at Autozone, or Advance Auto, or any parts place like those.
hope that helps
as far as the rear window heater is concerned, i think it would be a fuse. try that first, seeing as its a cheap and easy fix. if not, the heater unit may just be old, broken, or just not working. but try the new fuse first.
and with the indactors...im not quite sure what to say about those...i havent dealt with those before. lets see if anyone else can help you with that...
but i hope this helps u out, good luck, and post it when u fix the problems.