Technical => Electrical Tech => Topic started by: Dansbirds on March 24, 2009, 10:12:07 PM
Title: Fan wiring question
Post by: Dansbirds on March 24, 2009, 10:12:07 PM
On a 86 Turbo Cougar the fan has been wired to run constantly when key is on. Do any of you know what goes bad on these. Also as of now I havent found/bought any manuals for this car. I have all the Ford manuals for my sons 83 along with the EVTM, might these be similar for this car?
Title: Fan wiring question
Post by: jcassity on March 25, 2009, 01:39:26 AM
go to the top of electrical tech There is a sticky for the 87EVTM go to page 61 print that out or , clean it up some then print.
there is an integrated control module which has a couple of fan control relays.
double check power in / power out also.
Use your evtm to compare it to the one i put up.
Title: Fan wiring question
Post by: softtouch on March 25, 2009, 11:50:24 PM
If you have two fans it will be like the 87 diagram. If you have one fan it will be more like the 83. I will try to post the 86 EVTM diagram tomorrow.
Title: Fan wiring question
Post by: softtouch on March 26, 2009, 11:09:20 AM
From the 86 EVTM: The cooling fan controller-under the left hand side of the instrument panel. The Cooling fan temperature switch- lower left hand side of the engine. Connector C128- lower center of instrument panel. (http://mysite.verizon.net/vzetk5cc/sitebuildercontent/sitebuilderpictures/TCFancontrol.jpg)
Title: Fan wiring question
Post by: Dansbirds on March 26, 2009, 12:07:20 PM
Thanks, thats what I am after.
Title: Fan wiring question
Post by: Chuck W on March 26, 2009, 12:32:43 PM
Those stupid factory fan controllers go bad all the time. I always wound up removing them and replacing the set-up with a relay as well as a lower temp fan switch (the factory switch setting is WAY too high IMO). On the earlier cars (w/o gauges) you didn't know things were amiss until the engine light came on, meaning the thing was already overheating....
If the car still has AC, you can duplicate the above diagram with a pair of relays. If no AC, just one will be enough.
Title: Fan wiring question
Post by: Rages6971 on April 24, 2009, 01:49:15 AM
So is the diagram shown above also apply to a '85 turbo coupe? I finaly got the cooling system redone and ran the car up to opperating temperature, but the electric fan never kicked on. I tested the fan and it is working fine, so something is a miss in the wiring or relay.
Title: Fan wiring question
Post by: softtouch on April 24, 2009, 06:12:24 PM
Quote from: Rages6971;268898
So is the diagram shown above also apply to a '85 turbo coupe?
Yes
Title: Fan wiring question
Post by: 88turboeric on April 26, 2009, 08:52:59 PM
Quote from: Chuck W;264057
Those stupid factory fan controllers go bad all the time. I always wound up removing them and replacing the set-up with a relay as well as a lower temp fan switch (the factory switch setting is WAY too high IMO). On the earlier cars (w/o gauges) you didn't know things were amiss until the engine light came on, meaning the thing was already overheating....
If the car still has AC, you can duplicate the above diagram with a pair of relays. If no AC, just one will be enough.
I'd like more info on this :) I would like to do the relays with lower temp switch. (with AC) Could someone make a diagram/ description/ parts list for this :)
Title: Fan wiring question
Post by: jcassity on April 26, 2009, 11:37:05 PM
Quote from: 88turboeric;269256
I'd like more info on this :) I would like to do the relays with lower temp switch. (with AC) Could someone make a diagram/ description/ parts list for this :)
:rollin: sounds like you da man for the job! you need it so why not build it:bowdown:
Title: Fan wiring question
Post by: Bob on April 27, 2009, 09:07:27 AM
why build just pickup the dccontrol fk-35 I've had it for 4-5 years now and it works great.
Heres the directions for it check it out http://www.dccontrol.com/fk35.htm
Title: Fan wiring question
Post by: 88turboeric on April 28, 2009, 05:27:51 PM
the fk35 is $125, i'm assuming the relay method would be much cheaper right?? Could someone explain how to do it and what parts I'd need? :)
Title: Fan wiring question
Post by: Bob on April 28, 2009, 11:00:44 PM
I know I always pimp the dccontrol fk-35 every time this question comes up I'm sorry for that... but I think it really does works that good. It doesn't shock your electrical system with a huge current spike like a relay clicking on and off. It gradually turns the fan off and on as needed and maintains the temp better.
If $125 keeps my fan spinning and never lets me down than I'm happy :)
If you find a nice relay setup make sure you post a link so others searching can see it..
Title: Fan wiring question
Post by: jcassity on April 29, 2009, 04:56:21 AM
I'll do up a drawing to get us started this weekend. On the road now in texarkana tx.
it would be nice to have a solution to those 2.3 specific controllers, especially since my oldest is still wanting a tc.
Title: Fan wiring question
Post by: Rages6971 on April 30, 2009, 11:09:59 PM
I still can't find the fan relay! :mad: I have tried following the wiring harness back into the main harness and I am just am not sure what I am looking for or where it is located. I'll try looking again when the rain lets up here, but that could be another week.
The relay wiring diagram would be great to have as a backup, just in case there is a problem with the factory setup. I have a few of those just lying around. So far including the cost of the car, a new timing belt, hoses, radiator, fuel pump, spark plugs and wires, rotor and cap, I have about $550 into it. Spending $125 for one part isn't going to happen anytime soon.
Thanks for the help, I'm gonna need it:drink:
Adrain
Title: Fan wiring question
Post by: jcassity on May 01, 2009, 11:33:40 PM
Quote from: Chuck W;264057
Those stupid factory fan controllers go bad all the time. I always wound up removing them and replacing the set-up with a relay as well as a lower temp fan switch (the factory switch setting is WAY too high IMO). On the earlier cars (w/o gauges) you didn't know things were amiss until the engine light came on, meaning the thing was already overheating....
If the car still has AC, you can duplicate the above diagram with a pair of relays. If no AC, just one will be enough.
Now that i had time to look at the diagram (both softtouch's and mine), i see exactly what you mean. 221deg would not make me too happy either.
I am really sure anyone could duplicate that diagram along with a lower temp cooling switch and remedy the whole mess.
Title: Fan wiring question
Post by: jcassity on May 01, 2009, 11:35:57 PM
Quote from: Rages6971;269973
I still can't find the fan relay! :mad: I have tried following the wiring harness back into the main harness and I am just am not sure what I am looking for or where it is located. I'll try looking again when the rain lets up here, but that could be another week.
The relay wiring diagram would be great to have as a backup, just in case there is a problem with the factory setup. I have a few of those just lying around. So far including the cost of the car, a new timing belt, hoses, radiator, fuel pump, spark plugs and wires, rotor and cap, I have about $550 into it. Spending $125 for one part isn't going to happen anytime soon.
Thanks for the help, I'm gonna need it:drink:
Adrain
I dont own a TC but, from how the diagram presents itself, i would be looking for a little box of some sort with the color wires you already have going to it. Just trace backwards from the fan, the AC compressor and the coolant temp switch and they all should arrive back at the "cooling fan controller"
Title: Fan wiring question
Post by: Rages6971 on May 02, 2009, 10:03:42 PM
Quote from: jcassity;270140
I dont own a TC but, from how the diagram presents itself, i would be looking for a little box of some sort with the color wires you already have going to it. Just trace backwards from the fan, the AC compressor and the coolant temp switch and they all should arrive back at the "cooling fan controller"
I'll give it a shot. I think I will end up splitting some of the wiring harnesses to see where they going. That fan controler doesn't by chance look like an old style voltage regulator does it? Hmmm.......I might have already found it and just didn't know it........
Title: Fan wiring question
Post by: jcassity on May 03, 2009, 01:17:00 AM
the integrated controller module can be found on the strut tower on the pass side. The 87 and up box contains several relays.
Easy to troubleshoot if you like.
Title: Fan wiring question
Post by: Rages6971 on May 03, 2009, 02:00:37 AM
Sounds good! I'll get in there and take a closer look and try to follow the wires to it. I'll get some pictures also, just in case I go past it again.
Title: Fan wiring question
Post by: softtouch on May 03, 2009, 11:14:44 AM
"The cooling fan controller is located under the instrument panel to the left of the steering column" Says the 84 shop manual. I don't have a TC so I don't know what it looks like.
Title: Fan wiring question
Post by: Rages6971 on May 03, 2009, 11:39:10 PM
Well I have a couple pictures. I haven't had time to compare against the wiring diagram yet, been too busy putting brakes on the bird and getting the mustang ready for the first race. I think it is the black box up under the dash, but hopefully someone can confirm this. If this needs to be replaced how much do they usually cost?
Thanks for all the help! I'm getting closer to having it road worthy.
Title: Found it.........
Post by: Rages6971 on May 18, 2009, 11:59:41 PM
Alright I finally had a chance to track the wiring. The relay on an '85 is located behind the glove box. I ran a jumper across the terminal to see if the wiring was good to the fan, and everything seems to check out fine. I know price wise they are proud of these relays, but it appears to have just worn out from age so I will just replace it.
On the coolant sensor, does anyone have a part number for a cooler sensor? I think I will just go ahead and replace it while I am at it.
Thanks for the help and patients! :)
Title: Fan wiring question
Post by: 32VFoxBird on May 24, 2010, 09:56:58 PM
Quote from: Chuck W;264057
Those stupid factory fan controllers go bad all the time. I always wound up removing them and replacing the set-up with a relay as well as a lower temp fan switch (the factory switch setting is WAY too high IMO). On the earlier cars (w/o gauges) you didn't know things were amiss until the engine light came on, meaning the thing was already overheating....
If the car still has AC, you can duplicate the above diagram with a pair of relays. If no AC, just one will be enough.
Back from the dead!
Where do you get a lower temp fan switch? Part number?