Official Electric Fan wiring thread!

[E30Gus]

Bleed cooling System.

It's bled. I made sure there wasn't any air near the switch by cracking it open while running. I could hear a little hiss of air escape. I also jacked the pass side of the car up to get any bubbles out of that corner and along the top of the radiator.

[328ijunkie]

Bleed cooling System.

[E30Gus]

Well I tested the switch and it works perfectly. I put it back in and let the car get hot. The fan doesn't kick on until just before the tick after center (~3/4) which is too hot for my comfort zone. Do you think this has to do with the plastic sides of my stock radiator? Could my temp readout be off a little bit? Is there a lower temp switch I can put in there instead of the 80C?

[E30Gus]

OK I just installed the IE 14 inch electric fan as a pusher. I don't have AC so the fan fits in the AC/Aux fan spot nicely. I have the 82C fan switch in the radiator and all wired up to the original wiring. My problem is that the coolant temp gets above the half way mark and the fan doesn't kick on. If I jumper the switch the fan comes on and everything is good to go. So, bad switch? Actually I have two of the same switches and nothing happens with either. Two bad switches? One is brand new. I guess I should test the switch in 82c water.
Any ideas?
Gus

[Roysneon]

My fan is wired to my AC switch :)
Stealthy, and no AC so it really doesn't matter

The whole point of what is outlined in this thread is is so that the fan works by itself like it should and cools the engine without having to think about hitting a button to keep it from overheating.

[GunMetalGrey]

My fan is wired to my AC switch :)
Stealthy, and no AC so it really doesn't matter

[brianao34]

My car has no wiring in the fuse box for an aux fan. Not to or from where the fuses or relays plug in.

Oh, yea, that's not easy. Haha.

[Roysneon]

My car has no wiring in the fuse box for an aux fan. Not to or from where the fuses or relays plug in.

[brianao34]

Anyone know of a place to get a kit with a relay that I can wire that sensor and my e fan into? I'm sure there's a relay and wiring kit that would be easier than trying to add in the factory wiring to use relays under the hood.

Splicing into the factory wiring is the easy way.

[Roysneon]

Anyone know of a place to get a kit with a relay that I can wire that sensor and my e fan into? I'm sure there's a relay and wiring kit that would be easier than trying to add in the factory wiring to use relays under the hood.

[mtlbloodshot]

Thanks Dave found it with 61311364272!!

[328ijunkie]

Comes up everywhere: 61-31-1-364-272
or 61-31-1-364-272-82

[mtlbloodshot]

I cant find the 84 318i 2 prong switch any where! I also check on realoem with the part number and it says that it does not exist. HELP! please

[cormier]

alright heres what I'm working with.

In the first picture, the large plug on the right goes to your stock aux fan wiring, which it looks like you dont have. No problem there, just use the diagram in the OP for reference. green wire is normal speed (use resistor) and blue wire is high speed (connect to fan power on othere side of resistor) brown is ground (or you can use a seperate ground for your fan)

I cant see where the heck your switch wiring is, but it should be around somewhere. small little black/green, blk and blk/brn wires. again, use the OP diagram for reference.

Someone, please, for the love of God help me out. I'm at my wits end. Thanks in advance.

Sorry if I missed it above, but why aren't you just using the OP's original diagram and the stock wiring? It seems the way youre doing it is very overcomplicated. If you can get it to work using the stock system, maybe you can branch out from there and find out what your problem is.

[Gooch]

This might help some people that want to add a puller fan utilizing the stock circuit:

This is how I have my 16" puller wired. (I want to retain the condenser fan when I get around to hooking up the A/C.)

The fan will not come on.

-The system is bled correctly.
-The fan will come on with pins 87 and 30 jumpered.
-I replaced the aftermarket NEW 80/88 e36 ti fan switch with a NEW OEM switch thinking that would fix the problem.
-I have tried multiple known good relays.
-Because I'm retarded and can't read I had originally wired pin 86 to the green/black wire and the fan would come on when the key was in the run position (I think it was only key on, but it could have always on, I don't remember. I realized my mistake then wired it correctly, pin 86 to the brown/black).
-I swapped the K1 and K6 relays.
-The switch is wired correctly, pin 1=green/black, pin 2=black, pin 3=black/brown.

Someone, please, for the love of God help me out. I'm at my wits end. Thanks in advance.