nah.. fan's fine.. took it out and tested in on the batt.
have made a little progress... everything from the switch to the relay seems to be fine. there is the constant power to one of the little leads, and power to another one when switched to on.... However.. there is no power to either of the large leads that go into the relay, and presumably go through the power supply a bunch of other crap and the fan.. so i have to some how work out why there is no power to that part of the relay.. i'm pretty sure i've narrowed it down to a fat blue wire with a white stripe.... but where it comes from????.......................................
dunno if anyone can help much more, unless they have done similar things and happen to know where this wire comes from, in the engine bay...
i put a new engine in a month or two ago, so chances are it's a connection or something in the engine bay that's been disturbed... but im just not sure what