I am replacing my factory radiator fan on my VW Corrado with a flex-a-lite fan.
The factory fan is three speeds and reading resistance across the three positive terminals to the negative terminal I get:
0 ohms for full speed
.3ohms for high speed
.5ohms for low speed
The aftermarket fan is single speed but I want it to run at the three different speeds like the factory fan.
I was thinking I need to put a .3ohm resistor on one lead, a .5ohm resistor on the one lead, and connect the full speed wire directly to the fan. I don't see why this wouldn't work but I now need to know what type of resistors to buy. There must be more information I need than just the resistance value, right? Do I have to look for a certain style of resistor to work with this setup? What about wattage, tolerances, heat dissapation, etc.? Where can I go to buy what I need and what do I specifically need to ask for?
Thanks.
i just put a electric fan on my s-10,its not three speeds but i bought a kit from summit racing that turns it on with the a/c and has a adjustible thermostat. i probably wouldnt worry about the three speeds as long as it comes on when its needs to. but its up to u
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rottenbellys 05 crew cab colorado.Pioneer dehp 880prs, kenwood excelon in all 4 doors. Bazooka 500 mono Jl 10w3 in coustom center console box.
i would agree with rottenbelly. i have installed an electric fan in my wrangler. i got an adjustable thermostat from autozone (about $20) wired it to a toggle switch then to a thermostat. as long as the switch is on i don't even think about the fan, although it does remain on after the vehicle is turned off for a short peroid of time so do not wire it to vehicle ignition, wire it to vehicle constant but make shure to fuse it. keep in mind: the cooler the engine the better it runs (to a point,yes it can be too cold) so on, one speed is fine. hope i helped.
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the chevy jeep guy