I installed the taurus fan in my 96 b1500 5.2. It was work but I like the results. I too wanted the use of high speed for whatever reason that may arise. I used the relay from Advance auto with the probe.

I used two 30 amp fuses. One is mounted above battery. It goes from battery to relay. From relay to dash switch is another inline fuse.











See the red wires going through the fire wall. There are three. One wire comes from relay and hooks to the center terminal on the switch. From the switch, one wire on either side of center terminal goes to high speed wire and the other wire from switch goes to low speed wire of the fan.

I attached the wiring to my power steering pump hoses.




I bought the switch from Advance auto also. It's a 30 amp on/off/on. I also installed an l.e.d. to let me know when the fan is operating.



I made the fan mounting brackets out of aluminum.







The fan does not cover all of the radiator on the sides but does top to bottom.





This is where my temperature stays and I live in Florida with the brutal heat.




I used 10 gauge automotive wire and terminals and soldiered every connection there was. Trust me, the soldier make's a huge difference. Take the time and do it right. You will not regret it. I put this same setup on my jeep before the van using small wire and no soldier and had to redo all my main power and ground wires twice before I stripped it and used 10 ga wire with soldier. Also, with it set up like this, the fan is thermostatically controlled whether it's on high or low speed. At first I had it without the switch and only wired to the high speed but it pulled a lot of current. So I installed the switch with low speed and now I never use the high speed because the low speed does just fine. Even with the A/C. And if you feel you need the high speed with the A/C, just flip the switch.

 

Great write up. Glad the shroud covers a majority of the radiator face surface. I've seen the Taurus setup done many times for a Ram Truck, but not detailed to this level for a Ram Van.

You should see about 6-8Hp gain, about 10tq gain and 1-1.5mpg gain overall. Post back how your fuel economy is doing now with the mod. With the 10% ethanol killing our mpg in the past three years gaining a little back is helpful.