electric fans.
02-09-2015, 10:07 AM
#21
It looks like your controller has only one relay, and this controller varies the current to the fan based on the temp input from pins 10 and 11. I dislike the temp probes that ar put into the radiator fins; they vibrate, and eventually will break the fins away from the radiator core tubes, creating a cold spot in that section of the radiator, and also no longer can detect the temperature.
You'd attach the thick yellow to the the high speed input of the mark VIII fan, and the thick purple to the ground lead of the Mark VIII fan. The unused wire of the Mark VIII fan would be the low speed, and unused with this controller.
The only "switch" I like when it comes to large amp draw circuits, such as an e-fan is a relay. Make sure the relay in this case is a 30 amp or higher, as an e-fan can draw close to 30 amps when it's running. If you do use an on off dash type switch for one of the speeds, be sure it is only used for the relay trigger; this will be terminal 86 of the relay. This only requires a 15 amp blade type fuse, as it is only used to turn on the relay. Terminal 87 will be the output (to the fan hi or low speed, but not both!), and terminal 30 will be the fused power from the battery (install a larger fuse, like one used in stereo equipment, 30 amp instead of a 15 amp as shown in the diagram below; it was for a set of mild fog lights that did not draw over 15 amps), and terminal 85 is ground. Use the appropriate gauge wire for terminal 30 (from battery) and terminal 87 (to fan). Here's a picture of a typical automotive relay to power a device that draws a large amount of current:
You'd attach the thick yellow to the the high speed input of the mark VIII fan, and the thick purple to the ground lead of the Mark VIII fan. The unused wire of the Mark VIII fan would be the low speed, and unused with this controller.
The only "switch" I like when it comes to large amp draw circuits, such as an e-fan is a relay. Make sure the relay in this case is a 30 amp or higher, as an e-fan can draw close to 30 amps when it's running. If you do use an on off dash type switch for one of the speeds, be sure it is only used for the relay trigger; this will be terminal 86 of the relay. This only requires a 15 amp blade type fuse, as it is only used to turn on the relay. Terminal 87 will be the output (to the fan hi or low speed, but not both!), and terminal 30 will be the fused power from the battery (install a larger fuse, like one used in stereo equipment, 30 amp instead of a 15 amp as shown in the diagram below; it was for a set of mild fog lights that did not draw over 15 amps), and terminal 85 is ground. Use the appropriate gauge wire for terminal 30 (from battery) and terminal 87 (to fan). Here's a picture of a typical automotive relay to power a device that draws a large amount of current:
03-04-2015, 08:40 PM
#24
Hey bucko, I have a question for ya. So I'm curious if you've done any kind of air dam in the space between the electric fan and the shroud?? I mounted (finally) it in the shroud today and was just thinking, the fans going to pull air from the least resisted source, and I'm thinking the least resistance would be from the gap around the fan rather from through the radiator....or am I completely over thinking it? Haha thank you!
03-07-2015, 11:18 AM
#25
I'm still contemplating this but I have not seen an answer to how well the defroster functions. I assume it doesn't make much difference since the factory clutch fan still spins as well but curious.
03-08-2015, 05:17 AM
#27
Can anyone find this thread? I through the search engine and didn't find a thing
03-08-2015, 08:56 AM
#28
Uberhater,Troll,Whatever
This one? (advanced search, "e-fan, Bucko" = Presto!)
https://www.f150forum.com/f4/soon-e-fan-install-55999/
...plus some others. It's on my "to do" list.
https://www.f150forum.com/f4/motorcr...cs-vid-114646/
https://www.f150forum.com/f4/electri...lation-101534/
https://www.f150forum.com/f4/motorcr...nstall-245343/
http://www.f150online.com/forums/oth...-pics-vid.html
https://www.f150forum.com/f4/soon-e-fan-install-55999/
...plus some others. It's on my "to do" list.
https://www.f150forum.com/f4/motorcr...cs-vid-114646/
https://www.f150forum.com/f4/electri...lation-101534/
https://www.f150forum.com/f4/motorcr...nstall-245343/
http://www.f150online.com/forums/oth...-pics-vid.html
Last edited by 60DRB; 03-08-2015 at 08:59 AM.
03-08-2015, 06:41 PM
#29
Finished up the mark viii efan in the truck today,man that thing pulls some air!!! And cools the truck qwick. I ended up using flex a lite variable speed controller and just hooking up the high speed wire. Turned out nice and clean and almost looks factory. Very happy with it thanks for the idea and great writeup bucko!!
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