Guest Glenn Parker Posted October 25, 2001 Share Posted October 25, 2001 I picked up a 2 speed Taurus fan the other day. After cleaning it up, I did a little testing to understand the wiring prior to putting it in the car. There are three wires including the black ground wire. If I put 12 volts to either of the two power wires I get the same fan speed but if I put power to both the wires the fan will slow to half speed. Is that how Ford controled the fans speed or am I doing something wrong. All I'm interested in is high speed any way, but I'd like to understand its function. I'd like to hear from brighter minds than mine. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 25, 2001 Share Posted October 25, 2001 I'm a little hazy, but I want to say theres a black wire thats your ground and a black yellow and a black orange? (something like that). I just hooked it up to the battery that way to see how it worked, one was low, the other high, I used a relay to cut it on, and for the time being have it just wired to stay on, I'll do a thermo switch sometime. As I said thats hazy, they may have been solid colored wireds, but thats how I recalled it. It does work great BTW. Regards, Lone PS: Watch your fingers on the sharp plastic blades in the fan, while giving it a manual spin, they will cut you like you can't imagine. Quote Link to comment Share on other sites More sharing options...
pparaska Posted October 26, 2001 Share Posted October 26, 2001 The Ford two speed fans have a ground and two taps off of the windings. One tap is to hook 12V to get low speed, the other for high speed. Don't run 12 V to both those other taps at the same time - it will eventually burn up the motor. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted October 26, 2001 Share Posted October 26, 2001 FWIW my Cobra fan, which is supposed to be 2speed, runs one sped no matter which winding gets power (sigh). I might have two grounds too but I'm less sure of that. Running juice to both hot wires displays no apparent change in fan speed. I was stumped so I've simply set it up so that one relay is thermo switched and the other switched with a toggle. When the toggle one is clicked on the power to the thermo one is cut just in case it can't handle power on both windings. Not sure if mine is running high speed or not but it cools wonderfully! Next fan might be a Taurus one though so I can have two speeds (shrug). Quote Link to comment Share on other sites More sharing options...
pparaska Posted October 26, 2001 Share Posted October 26, 2001 That's weird. I got a new fan for a 98 Mustang GT and it IS two speed. High speed draws 35 AMPS! It almost shreds a piece of notebook paper trying to suck it through the A/C condensor and radiator on high! Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted October 26, 2001 Share Posted October 26, 2001 Well, my motor is a junk yard unit - long story With my cowl hood closed an dfan on there's a BREEZE coming out of th ecowl. It's actually picked paper off the gorund and sucked it up against the radiator. With the hood up you can feel the air at the back of the car I had one person at a cruise complain about the hot breeze and then move away once - I laughed One speed, two speed - so long as I don't run it full time it should be fine. My friend ran his on high whenever the engine was running - that's how I got the fan frame. Seems it fried pretty good being run that hard.... Quote Link to comment Share on other sites More sharing options...
z ya Posted December 15, 2001 Share Posted December 15, 2001 OK, so whats the verdit on the high speed? Is it the brown/yellow or the brown/orange? I bought the painless wiring relay/fan swith that is good for 30 amps. Is this gonna do the trick if its wired on high speed? It has a thermo switch that kicks the fan on at 185 and shuts off at 170. Thanks Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted December 15, 2001 Share Posted December 15, 2001 quote: Originally posted by z ya: OK, so whats the verdit on the high speed? Is it the brown/yellow or the brown/orange? I don't know but it would be easy to find out using any 12volt source, battery chargers are very handy and not large amp sources. (naturally batteries work alright). Have others used 30A relays with that setup fine? I've consistently melted some 30A setups with my 'lesser' flexalite, just my experience.....I finally put in 2 30's in parallel with the blade fuses to ensure no more hassles Maybe a single blade 30A would have worked, I'd only used tube style prior to my current twin 30's. Even the tube fuse would be OK on occasion but the ends of the fuse holder would melt etc and it was all new wiring I'd put in, cheap fuse setup I guess. good luck Quote Link to comment Share on other sites More sharing options...
z ya Posted December 22, 2001 Share Posted December 22, 2001 Thanks Dan, Its the brown/yellow for high speed. Its all wired now.. Quote Link to comment Share on other sites More sharing options...
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