Electrical problems with headlights/taillights

Recently when driving at night my headlights started turning off and on. They will click on for a few seconds and click off. It doesnt always happen and for a while it stopped. But the other day I turned them on and my gauge lights didnt turn on as well as my rear night time lights. So now my headlights and brake lights work but my gauge lights, yellow corners, and rear night time lights dont turn on. Are these on the same fuse??? Any suggestions as to what I should do. By the way its a 91 gt.

Matt

Alright so I did all that stuff today to my headlights and when I got done I went to turn the lights on and the only thing that went on was the headlights...just like before. So I checked my fuses and the number 4 fuse was blown. There was a 15 amp fuse in it and I replaced it with another and went to turn on the lights and it blew again, so I put a 30 amp in and went to turn on the headlights and everything was working again EXCEPT my rear taillights. I was happy to be making progress on this problem until I saw smoke coming from the headlight wiring harness. I unplugged it and the two brown wires and the light brown wires were the ones that were melting. Does anybody know what the heck is going on and what can I do. Please respond if you have any clue to what the problem is.

Thanks


Matt