My '97 Speedster has an electrical issue. The fuseboard behind helm smokes when power is connected to it (I think I knocked the power input whilst replacing the steering cable earlier this season and had to pull the power lead out to stop it smoking). The board is the one with what looks like a small relay and four fuses on it and a multi-plug connector - it controls the bilge pump, lights and blower I think.

Anyone heard of this problem before and can suggest any fixes? I think the part is discontinued so I'm going to be a bit stuck if I can't fix it!