I have a 1993 CTD. My headlights are not working. I changed the 20 amp fuse in cavity 4. The old one looked good also. Looking at the wiring diagram, it says there is a 30 amp circuit breaker, but doesn't say where. The front and rear tail lights work when I pull the switch on. Its only the headlights that don't work. Where is the 30 amp circuit breaker located and is there anything else I need to look at? They were working on Friday. Thanks