Author Topic: Fan Clutch Rediculousness (Read 6431 times)

monty23psk · « **Reply #15 on:** October 17, 2008, 09:22:28 AM »

good to hear. Right now I am doing the same thing and feel the same, except I have my Spal in place of the aux already. With fan on at low, since AC is on, temp is the same as with the fan clutch, never getting past noon on gauge. I still havent really been stuck in traffic either for that long and dont think that will happen unless its an accident on the highway. As for with ac off, fan hasnt kicked on, that I could tell, damm fan is to quiet, and only was in stop and go traffic for a small time. While moving needle does not get to noon on gauge, but when stopped it does climb but just past the noon mark so far. Will keep monitoring it. If anything, will get the lower temp switch to have the fan turn on sooner. I do have the shroud installed.

good luck.

dwf08 · « **Reply #16 on:** October 17, 2008, 12:08:22 PM »

where do you get the fans from? and what about the wireing?

monty23psk · « **Reply #17 on:** October 17, 2008, 02:34:59 PM »

I got mine from ebay, but same state as Spal, I believe Iowa, so it might be them or a nearby distributor. They carry all models and they are new. Cheapest price on internet, searched for a week and save $30. Since mine went where the original aux fan was, just used the original wiring, had to splide and kept the resistor for 2 speed.

AcSchnitzer318is · « **Reply #18 on:** November 04, 2008, 11:59:12 AM »

^I used a volvo fan... but am not having any luck getting it to turn on with the new lower temp aux fan switch. It never turned on with the other switch either. Only way I am getting it to turn on is with the AC button.

I can't figure it out. Tried jumping the wires on the 3 prong harness to the switch, but no luck. I think I may have wired the 3 wires at the fan incorrectly... is that a possibility? Don't hear a relay click or anything while jumping. When I do use the AC switch and probe the 3 prong harness, I get 1 positive on the black wire and the other 2 are negatives? I thought it should be one ground on the black wire and the other two are positives? Checked for power at the fuses and when the fan is switched on via the AC both aux fan fuses have power. When I remove the low speed fuse the fan turns off. When I remove the hi speed fuse nothing happens. I swapped the hi and low speed relays to see if that had any effect... but none. Any help greatly appreciated.

monty23psk · « **Reply #19 on:** November 04, 2008, 11:27:08 PM »

Well since the fan turns on with the AC, you have the low speed resistor working fine. Also your low speed relay is ok. But I am not sure on how the Volvo wiring is done. Do you use the low speed resistor with the Volvo fan?

You might have a faulty switch, which they do go bad. But if you bypass the switch and jump the 3-prong adapter, it should work on both. If it doesn't you need to check your wiring. I know the wiring when it comes to the BMW resistor. Not sure how the Volvo is. The the fan should have power and ground. But if you use the bmw resistor, you will have 2 power + ground. One lead of power goes straight to fan motor which is combined with the outport of the resitor. And the other power lead goes to the input of the resistor. I say input and output, but believe it doesnt matter as it is just a resistor. The trick would be the lead from the AC button/ low speed side of the switch goes together and the high speed just comes from the high speed side of the switch. I used the ETM to double check my wiring.

Right now mine is not coming on with AC button and I already changed resistor again with a new one. So I need to check fuse and relay. Also could be wiring.

let me know as I can try to help out.

AcSchnitzer318is · « **Reply #20 on:** November 06, 2008, 12:25:41 AM »

^Thanks for the info. The thermoswitch is a new 318ti lower tmep one... so I don't believe that is the issue. I checked my 3 pin harness at the thermowitch and the damn thing nearly fell apart in my hands after I took apart the connector. With the 3 separate leads exposed, I was able to get both hi and low speeds working on the fan. Soooo... I'm guessing I need to get a new harness to plug into the thermoswitch. For now I am going to kind of ghetto rig a temp solution. Problem I see, is that any harness plug I'd find in a junkyward will most likely have the same problem mine did with corrosion.

The volvo fan btw is a dual speed unit... so it has 3 wires coming off of it and you can delete the BMW resistor all together.

monty23psk · « **Reply #21 on:** November 06, 2008, 09:10:47 AM »

cool. Will look at mine today.