Wiring help for Ford Windstar dual fans. - Chevelle Tech
Chevelle Tech join team chevelle as a supporting member  
Chevelle Parts at SS396.com      
GROUND UP & SS396.com         
Official Sponsor of Team Chevelle
     

Auto Insurance

Chevelles.com is the premier Chevrolet Chevelle Forum on the internet. Registered Users do not see the above ads.
Electrical & Wiring Troubleshooting electrical problems.

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old May 23rd, 05, 2:18 AM
SS_Sean SS_Sean is offline
Senior Tech Team
Pro Bracket
 
Join Date: Nov 1999
Location: Oregon
Posts: 3,278
Default Wiring help for Ford Windstar dual fans.

It's just about time to install the Ford Windstar dual fans I bought used. It was my understanding, as I recall from memory, that the fans drew about 35amps. What gauge wire should I run from the fans to the relay located in the passenger compartment of the vehicle? I'm guessing roughly 8-10 feet total length from the fans, through the firewall, and to the relays located on the passenger side under-dash. Anyone have a handy chart showing amps draw, length of wire in feet, and the gauge wire necessary to wire it? Thanks in advance!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old May 23rd, 05, 8:54 AM
Dean Dean is offline
Lifetime Premium Member
Moderator
 
Join Date: Aug 1998
Location: near Kansas City
Posts: 31,755
Default Re: Wiring help for Ford Windstar dual fans.

http://macc.chevelles.net/wiretable.htm

You really should put the relays close to the fans
__________________
.

Gold Founding Member #3
My 69 SS
My 70 Convertible
Mid America Chevelle Club #01
Reply With Quote Quick reply to this message
  #3  
Old May 23rd, 05, 9:24 AM
SS_Sean SS_Sean is offline
Senior Tech Team
Pro Bracket
 
Join Date: Nov 1999
Location: Oregon
Posts: 3,278
Default Re: Wiring help for Ford Windstar dual fans.

Why would running the relay close to the fan matter, electrically speaking?
Reply With Quote Quick reply to this message
  #4  
Old May 23rd, 05, 5:37 PM
thunderstruck507 thunderstruck507 is offline
Senior Tech Team
Kevin
 
Join Date: Feb 2004
Location: Fayetteville, AR
Posts: 4,564
Default Re: Wiring help for Ford Windstar dual fans.

What is the best way to wire these fans? I bought a painless relay kit from Summit that has turns a fan on @ 200 and off @ 180, should I just hook this to the big fan and run the small one all the time or have them both come on?

I do not want a toggle switch on either for fear of forgetting and overheating. I could wire the small one for when the key is turned...would this be a good idea?
__________________
1971 Chevelle SS clone
head/cam ls1, 4l60e, 3.42 12 bolt
11.67@115mph, 1.71 60ft
Reply With Quote Quick reply to this message
  #5  
Old May 23rd, 05, 5:50 PM
vrooom3440 vrooom3440 is offline
Senior Tech Team
Steve
 
Join Date: Jan 2005
Location: Granite Bay, Ca.
Posts: 4,327
Default Re: Wiring help for Ford Windstar dual fans.

Quote:
Originally Posted by SS_Sean
Why would running the relay close to the fan matter, electrically speaking?
First I think your estimate of 8-10 feet may be a bit optimistic. By the time you get through running across and back and so on you could easily be looking at a bit more.

Next you have to consider the overall resistance in the power feed wires. The longer the wire the more resistance you will have. This equates to power dissipation and heat in proportion to the current squared. So is you have just 1 ohm of resistance (you will have less but this makes for simple math) you will have over 1200 watts of heat generated. Not a good thing.

You will have to run a pretty sizeable wire for this already without the extra up-sizing required for long wiring runs. Then you have to figure out how to pass it through the firewall. And this provides a prime opportunity for a short, as does any extra length.

It is much better to just put the relay up on the core support next to the fans and minimize the power circuit wiring since this is what relays were invented for.
Reply With Quote Quick reply to this message
  #6  
Old May 24th, 05, 12:10 AM
SS_Sean SS_Sean is offline
Senior Tech Team
Pro Bracket
 
Join Date: Nov 1999
Location: Oregon
Posts: 3,278
Default Re: Wiring help for Ford Windstar dual fans.

Works for me. Do you guys suggest running a relay for the waterpump and the fuel pump in the rear? I believe the water pump draws somewhere around five amps and the fuel pump is something like 15 amps at max.
Reply With Quote Quick reply to this message
  #7  
Old May 24th, 05, 1:56 AM
vrooom3440 vrooom3440 is offline
Senior Tech Team
Steve
 
Join Date: Jan 2005
Location: Granite Bay, Ca.
Posts: 4,327
Default Re: Wiring help for Ford Windstar dual fans.

For the fuel pump I would say definitely yes. The water pump is more of a maybe. A 5 amp draw would not by itself suggest a relay. But then it may be too much to add on to an existing ignition hot circuit. That would suggest using a relay controlled by any ignition hot and a seperate fuse and power circuit for the water pump.
Reply With Quote Quick reply to this message
  #8  
Old May 24th, 05, 1:58 AM
sinned sinned is offline
Senior Tech Team
Dennis
 
Join Date: Nov 2003
Location: in the dirt next to the apex
Posts: 3,090
Default Re: Wiring help for Ford Windstar dual fans.

Relays should always be as close to the device as possible to cut down on the amount of high amperage wiring being run through the vehicle, it also cuts down on the amount of voltage drop to the device allowing it to run at it's optimum. Your fuel pump for example may put out 20PSI at 14.4 volts but only 15PSI at 12.0 volts. Running a heavy load wire from the the front to the rear will easily burn off a volt to 2 unless you go overboard with the size of the wire.
__________________
"The democracy will cease to exist when you take away from those who are willing to work and give to those who are not."
Thomas Jefferson
Reply With Quote Quick reply to this message
  #9  
Old May 24th, 05, 5:15 AM
SS_Sean SS_Sean is offline
Senior Tech Team
Pro Bracket
 
Join Date: Nov 1999
Location: Oregon
Posts: 3,278
Default Re: Wiring help for Ford Windstar dual fans.

You guys are great. Thanks.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply
Chevelle Tech > Mechanical > Electrical & Wiring      Current Topic: Wiring help for Ford Windstar dual fans.
Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
i need some help wiring windstar fan please john6066 Electrical & Wiring 10 Apr 18th, 05 2:33 AM
Wiring electric fans to A/C switch Got_CID? Electrical & Wiring 17 Feb 10th, 04 2:52 PM
Windstar fans on the highway Daytona Jeff Heating & Cooling 18 Feb 1st, 04 9:36 PM
Spal Dual 11" fans DaleM Heating & Cooling 1 Aug 14th, 02 1:57 PM
Help with wiring the Winstar dual fans yanniz 2001 3 Oct 26th, 01 10:54 AM


All times are GMT -4. The time now is 4:57 AM.


Is there a site like this for?    El Caminos Camaros Novas Impalas GTO Chevy Punch All Chevys

2009 Team Chevelle - AutoForums