E36 m50tu pnp link ecu Electric Fan control

I am trying to get my electric spal fan with a relay to operate under the conditions that I had set via temperature control.

I am not sure if I have my set up wired properly. I have an XS loom that I bought for a wide band controller that still has remaining inputs to be used( not sure if I can use it?)

I have my trigger wire from the relay connected to the radiator temp switch low polarity wire that should switch on around 85* and another wire that connects to an ignition switched wire in the diagnostic port.

What do I have to do to get my fan working??

Hello, the wiring does not sound correct the trigger wire from the ECU aux output is going to be the earth for the relay and driven low side from the ECU. the relay out, assign the aux output to be a fan, and set the parameters to how you want it to turn on ie 88 deg c etc