wiring aftermarket radiator fan with resi

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Vw Kevin G

Member - Posts: 1

Joined: June 24, 2005

Location: United States

Posted: June 25, 2005 at 12:14 AM / IP Logged

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.

rottenbelly

Copper - Posts: 99

Joined: July 29, 2005

Location: United States

Posted: July 30, 2005 at 8:14 AM / IP Logged

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

rottenbellys 05 crew cab colorado.Pioneer dehp 880prs, kenwood excelon in all 4 doors. Bazooka 500 mono Jl 10w3 in coustom center console box.

dem3500

Member - Posts: 4

Joined: September 06, 2005

Location: United States

Posted: September 07, 2005 at 9:27 AM / IP Logged

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.

the chevy jeep guy

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wiring aftermarket radiator fan with resi

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