bit of topic what is the air con rad is that a blower?
u need a sucker, but a polarity change usually results in a direction change
just bought me a slimline fan for my td04 kit (already had civic rad)
anyway, im presuming to swap the polarity round, just switch the 2 wires round - or is it bit more complex?
it should have a rotation arrow on it and lookin at the blades it should give an indication.
Unless its one of the ebay super dooper push/pull fans?