look like your having fun. Hope you get it sorted.
I went through a fair bit of stuffing around with the EP91 Glanza V engine install in the ARO as I found out the electrics between the EP82 & 91 aren't the same or the ECU internals.
With the thermo fan you should be able to kick it in by earthing the sense wire and it should turn on. If not then it may not be your thermo sensor.
When you say your temp gauge is giving a false reading, what sort of reading is it giving? It will be earthed through it's housing and supply the reading through the resistance of the sensor, hotter it gets the less resistance (or more) it gets and send to the gauge. May also need to find out what the factory sensor resistance was. There are a lot of different sensors out there. I run a VDO dash & using their sensor in the water line to the radiator (aluminium piping).
Good luck with the build
Thanks for that, the false reading is basically when I turn on the car and it's cold, the temp gauge tells me the engine is warm (niddle on gauge is in the middle).
I'll have a go at what you said and hopefully it's something basic as no ground.
I had so many problems with this damn sensors, basically because I didn't have one wired up correctly the car refused to start, it took me weeks to find what the problem was.
I wish I just had a normal loom with all the sensors and aux bits so I could just swap it over and have no more problems.