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I just wired up the relays, the $20 temp controller from Auto Zone, soldered the wires, wrapped in electrical tape, then installed. The red/lt green wire I didn't solder, just cut a inch of insulation off, poked the middle of the wire to make a whole and split in half, inserted signal wire through middle, split into two sections, wrapped one clockwise and the other counter clockwise. For a picture go to page 7/8/9, pretty handy way to splice in or do end>end connections.
I too am running dual speed dual fans from a chrysler. I have 4 wires, one hot and one ground for high and low, I also grabbed the factory connectors that splits that into each fan, so instead of wiring up each fan (8 wires) I just wired up the factory connector.
I wired my low speed up to the temp controller set at roughly 180-190*F, high speed up to the AC, and a manual switch in the cab up to the low speed as well.
You don't need anything fancy with this setup, in fact you would just be needlessly throwing money away spending more than $100 total. What I did:
Used mopar fan (from junkyard) out of 04 sebring: $40
Grabbed a bunch of relays while I was pulling the fan: $0.50ea
Relay housing to keep you relays/wiring dry: $5 Pulled this out of a random car at the JY, best bet is to find a f150 with tow package and steal the two relay housing mounted behind the engine bay fuse box.
Some cheap switches off of ebay (5ct): $8
If you have the extra cash I can't stress enough upgrading your alternator to a 130amp 3g (TYC brand from rockauto $110 shipped), also upgrade the charging wire to 2ga w/150 fuse, then use the old charging wire to beef up the battery>chassis ground.
Even though you are paying more for an aftermarket fan, the ones that came on vehicles from the factory are more durable, quieter, and can usually push more air. They are just all around better quality, same goes with relays- I always pick the newest looking car clean of it's relays when I'm running low, most systems use a 30-40amp relay so it doesn't matter what vehicle/system it comes from it will probably work for what ever you need it for (if in doubt google part# on relay for specs).
The pulley on the alt remains the same size so I would say no, so long as you get one suited for your trucks options (with or without a/c-that seems to be the only factor that changes the pulley diameter/belt size).
I actually saw my fan running for the first time today. Every now and then I can hear it slow down when I shut the truck off but it turned on for a minute or two then cut off while it was idling with the hood up today. Its practically silent when its running, even with my head under the hood. I love this fan and highly recommend it. Its an imperial single 16" fan from advance part #226116. Its rated at 1400 cfm and cools my engine great. I also still have the 2g alternator and it handles this fan easily.
03-09-2015, 07:32 AM
