our 87 blows the taillight fuse everytime we turn on the headlights but we checked the relays and there good so could our problem be coming from the dimmer switch or the headlight switch ??because this problem started about a week ago our dashlights went then are running lights went its weird because all the blinkers and the headlight and brake lights still work can anyone offer any ideas.or tell us where we can get an online wiring diagram thanks...

I couldent find one that you can view on line, but you can order this one

http://www.books4cars.com/search~findmake~...ddesc~Supra.htm

look for this... 87 Supra Wiring Diagrams by Toyota. (87_WD022U)

wiring diagram online
Service Manual Online