another wiring question.

June 01, 2006, 03:42:55 AM

I know ya'll prolly thinking what did that idiot do to his wires now? :D Actually is there an electric fan circuit in our cars?

If not what would it do if I just hooked an electric fan up to a toggle and ran it that way until I could get a temperature controlled switch for it?

The reason I ask is I have a dual electric fan that I ran across which was in a truck but could be made to fit in the car. It was also the best price.... FREE.

another wiring question.

Reply #1 – June 01, 2006, 08:18:28 AM

careful on the rotation,, a member a couple years back >joefriday i think< did this and overheated when moving which was odd and he finally found out the oncoming wind was nulling out the fan or slowing it down due to the rotation of the blades and the angle of each blade.

as for wiring,, i would use a relay. Send power to the input side of the coil in the relay and wire up the ground side directly to the coolant temp sensor.(small guage wire will be fine). wire up the fan from 12v with an inline fuse across the contacts of the relay but use a larger guage wire due to the fan and its ampacity pull. if you need a diagram, ill do one up.

another wiring question.

Reply #2 – June 01, 2006, 09:50:36 AM

Quote from: Master_xzavior

Actually is there an electric fan circuit in our cars?

Nope... AFIK the '94-'95 Stang has the only 5.0 processer that has fan controll...

Quote from: jcassity

ampacity

Scott that ain't a word(well maybe it is in WV) :)... Amperage or current draw would be correct

another wiring question.

Reply #3 – June 01, 2006, 11:04:14 AM

Quote from: jcassity

if you need a diagram, ill do one up.

That would be sticky-worthy, methinks.

another wiring question.

Reply #4 – June 01, 2006, 07:28:26 PM

Well the turbo coupe all the way back in 83 had a seperate fan controller. The best option I can think of would be to buy a after market fan controller. I have a Hayden fully adjustable model it is real nice. It even has a A/c signal wire so the fans come on with the A/c. I also added 2 hayden electric fans. But you could use it to run those fans you've got. I bought it a Oreilly auto parts for about $35. As for the fans you've got to double check whitch side the fans are mounted on the factory vehicle. that should tell you whitch side of the raditator that you need to mount those fans you've got.

another wiring question.

Reply #5 – June 03, 2006, 07:00:37 AM

jcassity..... would that speed and slow up the fan as the temp changed wiring it to the temp sender?

ipsd..... I was actually looking at a controller through summit but I didnt know you could get them that cheap though all the ones I saw were like 80 bucks or more.
And on the fans they were hooked up on the inside of the radiator if I remember right between the engine and radiator. when its running the air comes through and goes onto the motor so Im guessing its hooked up right.

another wiring question.

Reply #6 – June 03, 2006, 12:55:04 PM

tom,,,yep its a word (short for amerage capacity of a conductor with relation to its size, awg type stranded or flex, material and temperature coeficient with respect to length),:hick: http://www.okonite.com/engineering/nec-ampacity-tables.html

Master_xzavior
sounds like your fan is going the right way.

jkirchman and Master_xzavior
here is the drawing,,, the coil of the relay would get power only when the coolant temp sensor thermaly closes and provides a temporary ground due to the intake coolant heating up the thermal coolant temp sensor. When this happens, the magnetic field created by the coil pulls the contacts closed and the second circuit delivers power to the fan which has a fixed ground.

another wiring question.

Reply #7 – June 03, 2006, 03:58:24 PM

The hayden unit has relay built in. Also it has a temp probe for the raditator. It is made to run two fans. Check your local Oreilly auto parts. They stock the one I bought in most stores. A toggle will work just make sure you turn them on when you are in town or when the A/c is on. Even goin down the roan at 60mph.

another wiring question.

Reply #8 – June 03, 2006, 04:35:10 PM

Sticky! Sticky!;)

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Reply #9 – June 03, 2006, 07:09:01 PM

I had to read that twice to understand it lol. Geez I hate just waking up not long ago. Doesn't sound hard at all.
Now would I have to buy a fan specific relay?
Also would I just splice it into the temp wire that's already there?
and if so is it going to matter that the sensor runs a GUAGE and not a light?
I was under the impression that the ohm-age of the sensor increases or decreases between a certain amount as the temp raises and lowers.
If thats the case would the relay slowly charge and uncharge or does it just kick in at one certain Ohmage?
Inquiring minds want to know :D

another wiring question.

Reply #10 – June 03, 2006, 08:23:07 PM

Quote from: jcassity

tom,,,yep its a word (short for amerage capacity of a conductor with relation to its size, awg type stranded or flex, material and temperature coeficient with respect to length),:hick: http://www.okonite.com/engineering/nec-ampacity-tables.html

I stand corrected.....

another wiring question.

Reply #11 – June 03, 2006, 11:11:44 PM

Quote from: Master_xzavior

Now would I have to buy a fan specific relay?.

no, not really,, any auto relay will do

Quote from: Master_xzavior

Also would I just splice it into the temp wire that's already there?
and if so is it going to matter that the sensor runs a GUAGE and not a light?

i would, the guage is seeking ground through the temp sensor as well as the relay,, and you make a good point that the resistance of the sensor tips the balance with the resistance of the cluster guage. I would say give it a try and see, either way it wont be any loss IMHO. turbocoupe50 or thunder chicken would know this stuff a little better,, ive not dickered with any of what i am talking about on my coug but there isnt any reason why it wont work. Its just a copy cat of what is existing everywhere in most every relay application anyway. Relays are used primarly to create a circuit isolation without burning up harnesses. They also offer as control devices to be supervised as to when they go on or off.

Quote from: Master_xzavior

I was under the impression that the ohm-age of the sensor increases or decreases between a certain amount as the temp raises and lowers.

yep, if you go out and read continuity from the tip top of your temp sensor (single wire sensor), it will read open if the engine is cold,, and some nominal resistance if hot. i forget exactly what a very hot temp sensor reads,, likely along the lines of something under 100 ohms or thereabouts..but that may be incorrect. all i know is that your relay needs a ground at a certain point. i wonder if the engine would have to get hotter than normal to kick on the relay??? give it a try. the concept exists in cars with factory elec fans anyway so do a stare and compare. At worst case,, put a toggle switch inline with the ground side of the relay coil up in your dash. Run the ground wire of the coil to the switch and wire the other side of the switch to chassis ground with a short wire somewhere in your dash.

Quote from: Master_xzavior

If thats the case would the relay slowly charge and uncharge or does it just kick in at one certain Ohmage?
Inquiring minds want to know :D

no, the relay does not charge , its a switch that is activated by magnetic field it produces when the coil side gets a ground. in this case, its simply waiting for a ground to be given to it via the coolant temp switch. SO,,, as the temp sensor heats up ,, an eventual event will happen and a ground will be developed which the realy has patiently waited for. When the relay gets that ground it needs,, the contacts will close and deliver power across the larger wires up to the fan and make it run. Of course,, as the fan cools your engine down,,, the sensor will increase in resistance and force the relay to not be able to hold the contacts closed that power the fan.

another wiring question.

Reply #12 – June 03, 2006, 11:22:05 PM

Quote from: TurboCoupe50

I stand corrected.....

naww,,,:giggle:

But aint it a fun word? people look at you like,,,huuu???:D

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Reply #13 – June 03, 2006, 11:36:59 PM

Quote from: jcassity

naww,,,:giggle:

But aint it a fun word? people look at you like,,,huuu???:D

So its a sucker word HUH???

Was a new'n ta's me...

another wiring question.

Reply #14 – June 03, 2006, 11:48:54 PM

tom,,,,any comment on my second and third comment up there?