dieselnutjob

My Jag on YouTube https://www.youtube.com/watch?v=URTG9gV1jSo

Please can someone tell me how the trinary switch system works on the 75 coolant fan? I have a 75 ECU now running on my Freelander 1 (I already got hill descent and traction control working), but the way a Freelander1 ECU controls its cooling fan is totally different. I think that the solution is to convert the Freelander 1 to the 75 trinary switch system but I don't really understand how they work. It has air conditioning so I'll have to do that the 75 way as well.

anyone know of a breakers that specialises in 75s ? I'm after a torque converter but it needs to be from a 1.8 K series auto.

I spent much of today crouched here:- with the engine dangling above my head. Drilling out spot welds:- and peeling back metal. This bit fought me a bit:- I'm nearly ready to start making a replacement bit and start welding it in:-