Fan Wiring

[Struggler]

Does anyone know how the fan is wired up on these? Not sure there is a difference on the ph1 to the ph2 but I remember reading somewhere there is a connection for low speed and one for high based on AC demand. I basically have this:

Please enjoy my lovely sketch. But yeh, basically two wires from the loom making three in total if you include the ground. I need to reduce this basically to x2 wires for an aftermarket fan I have but not sure which to take from the main loom and which to cap off.

 

[Struggler]

I did a bit of googling and it looks like there's a relay or some kind of connector next to the fan that I can't quote work out what it would do.

 

[Matt Cup]

Isn’t it a resistor?

 

[Struggler]

Hmm, could be! But what would it need a resistor for?

 

[Struggler]

Unless it sends power via the resistor for a low speed mode and direct to the motor for high speed? .

I think the low speed mode was for low speed ac performance meaning I could just cap off the wire to the left plug and just keep the other going direct to the right plug.

 

[Matt Cup]

I’m not sure pal. All I remember was in my R53 the resistor pack failed and in order to get it going I used an inline resistor to fix bodge it. Which has probably got naff all to do with your issue

 

[Struggler]

Hey, any input is appreciated! Knowing it's a resistor definitely helps because my theory does make some sense assuming it's just a dumb electric motor running the fan.

I'm not looking to fix anything though, I just want an easy two wires going to my aftermarket fan, that come on when coolant hot and off when coolant not!

 

[Matt Cup]

@Brigsy seems to be a wiring guru, I’m sure he’ll have some good ideas

 

[Brigsy]

@Brigsy seems to be a wiring guru, I’m sure he’ll have some good ideas

Super easy mate, done it on my trophy years ago with high powered comex fan. Bin resistor, and run on high power fan/ direct from relay

 

[Struggler]

Super easy mate, done it on my trophy years ago with high powered comex fan. Bin resistor, and run on high power fan/ direct from relay

Awesome! I am also trying to adapt to a comex fan.

Would I be right in thinking the plug with two wires going to a single terminal is the fan plug and the other the resistor? As marked up above? And to bin the resistor you just remove the sections I've crossed out?

 

[Brigsy]

This is ph2 as i dont have a copy of visu for ph1.

777 is 50a fuse in fusebox.
234 is fan relay.
120 is engine ecu/clt sensor.
700 is low speed relay.
321 is ac fan resistor.
262 is rad fan.

Im sure i just removed resistor, and ran pin 2/wire from main relay straight to fan, and other side of fan to earth as oe same as your diagram.