Radiator cooling fan control wiring question

I've got a couple of Volvo radiator cooling fans(apparently from '01-'03 Volvo S60), one of which is mounted in an old Buick in front of a 455. It works great and moves an amazing amount of air, but it's wired direct from a relay to the fan motor, and only runs on high (and draws a ton of current when running)

My extra fans all have a metal box mounted on the shroud, and the wiring goes through it to the fan motor. From what I've gathered searching online, there is some sort of 2-speed control that may be possible.

Here's a pic of what I've got - Anybody know how I can get some control of the fan speed?
http://image.swedishpartsshop.com/live/G5000227685OES.JPG

Anybody?

Beuhler? ... Beuhler?

Take a look at:

http://www.dccontrol.com/0820.htm

This might provide you with a solution.

My source suggested you talk to Brian Baskin at DCC.

jeff

Anybody?

Beuhler? ... Beuhler?

That little box is a Pulse Width Modulated signal from the ECM, it actually has 4 speeds, 25%, 50 % 75 % and 100%

Your best bet is remove that box, and wire the fan to a temp control devise.

That's what I was afraid of...

I tried contacting the guys at DCC, never got a response.

I'm looking into other controllers.

Thanks for the info!