crestweed

My aircon doesn't work - never has yet - no gas. Compressor is noisy screechy too but I have a new one to fit.
BUT- fans do work - but don't come on at all - which made for a hairy trip over the weekend as Oil Temp got to 120!

I opened up the relay and closing the contact DOES switch on the cooling fan on low (in picture @ 9 o'clock).
In effect connecting the blue and white cable to brown sends battery power to one of the fans.
Likewise closing the 6 o'clock contact sends battery power on brown to fan via purple and white and fan runs on high speed.

For now I want to be able to fit a switch using this relay so which wire in YWB100800-3 does what?

In other words how can I close the contacts using the 5 wires in YWB100800-3 ?