Just the other day i was replacing the fuse in my electrical fan. After i was done i notice that my dom light was not on. Then i also notice that my radio was not working. Then i started checking other things and my headlights are not working. Everything else is fine. I check all the fuses i do not know what the problem is. NEED HELP. 1988 Mustang GT

it maybe the head light switch, in the manual they say it has a 20 amp fuse in it.. or a broken wire in the connector. worth checking