electric fan wiring help!

[CoupeCarl]

I have 99% completed an m30 conversion but i am stuck on the wiring for the elecric fan setup,
I am using an e32 aircon fan, tested and working on both speeds.

I have a coolant temp switch in the side of the rad, it has 3 wires so im guessing
its a dual speed switch?

I have searched high low and cannot find which wire is which and dont fancy shorting anything out, i dont have a circuit tester. Wiring diagrams confuse the heck out of me so staying away from them if its possible,

Can anyone help?

[heathy325]

Danthe on hear dose a fan wiring loom for about £40 I'm running one with my m52 conversion and it's great dead easy to install too, drop him a pm for more info

[e30rapidic]

[Motorhole]

To use the temp switch, fan has to be wired through the unloader relay in the fuse box and it involves a little (minimal) splicing and soldering. DanThe's loom essentially replicates the factory wiring, which is available on the wiring diagrams on the wiki:

http://www.e30zone.net/e30zonewiki/imag ... ry_Fan.pdf

Tbh I think this is why most people seem to use a permanent live for the fan (=rubbish as it hinders airflow at speed) or a switched setup from the dashboard (=potential for running hot/overheating if you forget about it).

It's worth spending the time trying to understand the diagrams so you can get a proper setup using the temp switch. You can even wire in a manual override quite easily if you want to keep the fan running on the move for drifting, for example, where not a lot of air is going through the rad.

[tari]

im in the process of fitting mine too. I've been told that I shouldn't use the temp sensor that goes in the rad, as this is not accurate enough.
I'm totally baffled as my plan was to use one of those.

[Grrrmachine]

Have you all read this?

http://www.e30zone.net/e30zonewiki/inde ... ectric_Fan

[tari]

Thanks for that grrrmachine
That answers all of my questions