i replaced the relay, circuit breaker, and little 10A fuse with a mates ones from his cressi, didn't fix it.. and mine worked in his.. so that cancells out the easy stuff.
i'm yet to connect the fan up directly to the battery to make sure it's goin, but im pretty sure it's not the fan.. it jsut stopped working one day.. didn't die a slow degrading death and never made any kinda funky noises..
had a quick play round with a test light, jabbed her into the socket that leads directly to the fan.... no power there (in either lead).. so yeah.. something funky happenin in the wiring between the relay and the fan, or something like that.
the relay does click when you turn the switch to on.
i really need a wiring diagram.. haha