Radiator fan install & wiring help...

[txrocco@sbcglobal.net (ATS - Patrick Bureau)]

yes you can control the speed of the fan with electrical means, no you
cannot simply attached your low and high speed power lines together, becak
they are different systems and you would be basically grounding yourself
into the other line. (I am not going to get into electrical details on this
one, the use of a relay is simple, ground on , the trigger join up on the
power wires, and the relay will trigger the proper trigger power line
(high/low) lines to fee the power accordingly to the fans, making them true
blue dual speed.
if you need a diagram I can make you one.

ATS - Patrick Bureau - txrocco@sbcglobal.net


=>-----Original Message-----
=>From: Ryan H [mailto:rhock99@epix.net]
=>Sent: Tuesday, December 31, 2002 9:54 PM
=>To: ATS - Patrick Bureau; scirocco-l@scirocco.org
=>Subject: Re: RE: Radiator fan install & wiring help...
=>
=>
=>About using a relay: Isn't the Flex-a-Lite a single speed fan?
=>Or is the speed of the fan voltage dependant?  In the latter
=>case, couldn't you just use both stock red wires to power the
=>fan, and when it's in low speed mode, the Flex will only see X
=>voltage from the low speed wire, then in high speed mode it sees
=>Z (>X) voltage from the high speed wire.  This thinking is all
=>because the stock wiring for the fan already is relayed this way.
=> Or am I thinking of this wrong?
=>
=>> The fan plug has three wires composed of a 1 ground (*brown*) 1
=>High speed
=>> and 1 Low Speed wires. Check Page 4-10,4-11 of Bentley, I do not recall
=>> which is what for high and low, but an easy test with a
=>multimeter will tell
=>> you right away. which is which.
=>>
=>> what most people do is set up a relay to kick in the high speed
=>on to both
=>> fans when it is required and have the relay come back to low speed when
=>> required, or they use one fan on low speed and connect the second fan on
=>> high speed.
=>>
=>> what I did ? both fans on low speed, none on high. but I am
=>going to change
=>> this when My 2L goes in I will be using the relay system, I was too lazy
=>> last time I installed it. I live in Texas, and I have yet to see my temp
=>> raise above the led in 100+ temps with AC running. and oil temps sits at
=>> 100'c but I can tell you that the first week of driving with
=>the new fan I
=>> kept a real close eye on the temps :)
=>>
=>> As for the way your fan should sit, if there is an issue you
=>want it to the
=>> foremost right (passenger side), so that the sensor in the
=>radiator has a
=>> "average temp"  and not cut off/turn on too many time the fans
=>because they
=>> cooled the liquid closest to the sensor.
=>>
=>> just to let you know, the fan works wonders, and  make sure you
=>wire it the
=>> right way (pull or push depending which side your installing it
=>on the rad).
=>>
=>> ATS - Patrick Bureau - txrocco@sbcglobal.net
=>>
=>>
=>> =>-----Original Message-----
=>> =>From: scirocco-l-admin@scirocco.org
=>> =>[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Ryan H
=>> =>Sent: Monday, December 30, 2002 11:28 PM
=>> =>To: scirocco-l@scirocco.org
=>> =>Subject: Radiator fan install & wiring help...
=>> =>
=>> =>
=>> =>I recently got a Flex-a-Lite to adapt to my 16V and have a few
=>> =>questions... The plug for the stock fan has 3 wires - red
=>> =>w/black, red w/white, and brown.  The Flex-a-Lite only has 2 (per
=>> =>fan) wires, power and ground.  So which wire do I use to power
=>> =>the Flex-a-Lite, red w/black or red w/white?  What is the
=>other wire for?
=>> =>Also, the Flex-a-Lite is a bit small for the radiator but will
=>> =>fit with a little rigging... do you think it will be ok if I
=>> =>offset the fan all the way to one side and then have about 6
=>> =>inches of radiator overhang on the other side?  Or should I rig
=>> =>it into the middle (more difficult) so that there's 3 inches of
=>> =>overhand on each side like the stock fan shroud?
=>> =>
=>> =>
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