Alex 1981 DT 175

Hello guys, new to the forum and *classic Yam\'s! Only got it a couple weeks ago but I love my bike. Its a 1981 DT 175MX and theres a problem with the electics, nothing works, neutral light, lights, brake light, indicators everything. I\'ve checked all the connections and for water but its still not working, the bike will start and run though. Just wondered if anyone knew of a particually vulnerable area, also is there a fuse box on the bike? Surely there must be fueses somewhere? Many Thanks, Alex. * Well we have has this for about 22 years now, YT 60, uber rare!