One other thing to check for when experiencing turn signal problems -- the metal spring holder for the fuse within the fuse block itself. I experienced turn signal problems in my '89 Pioneer for the better part of three years, and threw parts at the problem (new flasher, new turn signal switch, complete set of new fuses), only to see the problem reoccur periodically. Turns out that, upon close examination of the fuse block, the metal spring holder in the block for the turn signal fuse had broken (only half of it remained in the block). My electrician solved the problem by routing that electrical line to a new auxilary fuse holder. Don't know whether the spring breaking was due to clutch fluid leaking into the fuse block from a failing clutch master cylinder, or whether the fuse holders simply become brittle over time. But, for those of you with wonky turn signals, it's worth a look.