Join Date: May 2018
Location: Barboursville WV
Bronco Info: '91 Silver Ann
I did the 3g alternator upgrade, aluminum radiator, and e-fan in my 92 f150. Also new water pump and t-stat. I did the same upgrades to a couple fox body cars and will be doing the same to my 91 bronco. The fan controller is fairly easy to wire up. I'd like to offer some advice, though. Don't use the controller that had a temp probe that you insert into the radiator fins. Summit sells a "Maradyne" brand iirc that uses a threaded sensor. When you mount the sensor, don't mount it high in the engine bay. The intake is usually the easiest spot, since it probably has a port that will work. Also, the water neck may have a port you can use (or you can buy an aftermarket one that has it).
The problem is that air pockets are more likely to be up high in the intake or upper hoses.
What I did was have bungs welded in to the aluminum radiator tank, about half way up. An easier way would be to buy a billet aluminum coupling made specifically for this. You can buy them on Ebay for under $15. Simply cut your LOWER radiator hose and install the coupling with a couple band clamps. It will have a threaded port to install your temp sensor.
Also, I've had better luck with the non-adjustable controller. The one I use from Summit can be purchased for different desired temps. I use 180 or 190 degree on mine.
This setup will assure that the fan is only going to kick on when coolant is running through the radiator (t-stat open). Mounting the sensor in the intake may cause your fan to run when it doesn't really need to.