Help me wire my ELECTRIC FANS! - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 12-07-2008, 06:17 PM
DarknessSpawned's Avatar
God Of Lightning
 
Last photo:
Join Date: Mar 2008
Location: Clear Water, FL
Posts: 97
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Help me wire my ELECTRIC FANS!

Since Im trying to finish up wiring... And went through the power window
relaywiring in the end to conclude I should not use the relay... Id like
to double check my fan wiring diagram...

Does this look alright... What would you perhaps do differently
if you dont agreewith my diagram?



    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 12-07-2008, 06:56 PM
Member
 

Last journal entry: More on the Cobra Engine
Last photo:
Join Date: Feb 2007
Location: Cincinnati Area
Posts: 206
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
You seem to have taken quite well to the electrical thing...

The two 30 amp fuses are over kill, but that's fine, I would like to see them come from the fuse panel and not by way of an add on fuse at the battery. Why have two fans if your going to control them both together. I would use a staggered approach and have one fan, say the larger of the two, come on at a set temp, say somewhere in the 175-185� range. The other should come on only as a back-up to the first, which you could control with another temp sensor or thru a relay set-up, or Spal controller. The control wiring, which in this case would be minimal, should be fuse protected and say in the 10 AMP range, I would also install a convenient switch that would allow me to manually intervene and control the fans when I want. This arrangment works well when you want to make sure the fans are working, and allows the manual operation should the Temp sensor fail.

I have several fans on my project:

Radiator fan, 1-16" turbo fan
Engine Oil Cooler, 1-8" B&M fan
Transmission Oil Cooler, 1-8" B&M fan
Inter-cooler Water Cooler, 1-8" B&M Fan

I use 4-temp sensors and 2-Spal fan controllers and a remote water pump to make the system function. The fan controllers are a great way to slow down the fans so they don't make to much noise, and allow them to come in at pre-set stages, with only the one sensor as in your case.

This water resistant controller is programmable, and will read almost all OEM and After-market sensors on the market.

-Programmable to activate at any temperature
-Factory programmed to 160� Low, 200� High
-Variable speed for reduced fan noise
-Uses OEM or optional SPAL Temp Sensor
-Waterproof extruded aluminum construction
-LED indicators for High, Low, and A/C
Attached Thumbnails
Click image for larger version

Name:	FAN-PWM.jpg
Views:	98
Size:	5.8 KB
ID:	34835  
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 12-07-2008, 07:33 PM
Countilaw's Avatar
Cox Custom Cars
 
Last photo:
Join Date: Oct 2005
Location: Cleburne, TX
Age: 64
Posts: 498
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
If you are running a air conditioner, I would wire one fan to come on when the a/c was turned on.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 12-07-2008, 08:00 PM
DarknessSpawned's Avatar
God Of Lightning
 
Last photo:
Join Date: Mar 2008
Location: Clear Water, FL
Posts: 97
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by yknot
You seem to have taken quite well to the electrical thing...

The two 30 amp fuses are over kill, but that's fine, I would like to see them come from the fuse panel and not by way of an add on fuse at the battery. Why have two fans if your going to control them both together. I would use a staggered approach and have one fan, say the larger of the two, come on at a set temp, say somewhere in the 175-185� range. The other should come on only as a back-up to the first, which you could control with another temp sensor or thru a relay set-up, or Spal controller. The control wiring, which in this case would be minimal, should be fuse protected and say in the 10 AMP range, I would also install a convenient switch that would allow me to manually intervene and control the fans when I want. This arrangment works well when you want to make sure the fans are working, and allows the manual operation should the Temp sensor fail.
Funny you should say that, I actually wass going to do that at first.
But Couldnt decide how to make themanual over ride switch work.

And also since v8s10's are always having cooling issues, I decided
to skip 2 temp switches because it would only save me a little bit
of time between fan cycles and I want to make sure it STAYS cool
so Im not that worried about the 2 fans running at the same time...

But I would like to insert the manual over ride switch.
I already have a 3 prong blue light switch..
How do ya do it.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 12-07-2008, 08:54 PM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,762
Wiki Edits: 0

Thanks: 4
Thanked 66 Times in 64 Posts
Based on your diagram, it looks like the temp switch provides a ground for both relays when the temperature goes above 185. To have a manual override, all you have to do is add a switch that manually grounds the circuit.

Run a wire (16-18 gauge) from the 85 terminals up to the dash switch, and ground the other side of the switch. When the switch is on, it provides ground and turns the fans on manually.

Bruce
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 12-07-2008, 09:52 PM
TooMany2count's Avatar
A Half Crippled Old SOB....
 
Last wiki edit: GM RPO build codes Last photo:
Join Date: Jan 2003
Location: Cahokia,IL..... Donate Blood Products & Sign your DONORS CARD
Posts: 807
Wiki Edits: 5

Thanks: 0
Thanked 1 Time in 1 Post
Take a look at how Alan did his, he use 2 relays for each fan &

http://www.alanhorvath.com/54chevy/mad_electrical_2.php
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 12-08-2008, 01:03 AM
DarknessSpawned's Avatar
God Of Lightning
 
Last photo:
Join Date: Mar 2008
Location: Clear Water, FL
Posts: 97
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by 75gmck25
Based on your diagram, it looks like the temp switch provides a ground for both relays when the temperature goes above 185. To have a manual override, all you have to do is add a switch that manually grounds the circuit.

Run a wire (16-18 gauge) from the 85 terminals up to the dash switch, and ground the other side of the switch. When the switch is on, it provides ground and turns the fans on manually.

Bruce

How about one of these for each fan.......

http://store.summitracing.com/partde...5&autoview=sku

And can it be grounded anywhere? Best place?
I wouldnt mind lighted switches would look nicer
but would need power for the light and might not work well.


EDIT: I'll add a diagram....

Last edited by DarknessSpawned; 12-08-2008 at 05:30 AM.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 12-08-2008, 06:20 PM
DarknessSpawned's Avatar
God Of Lightning
 
Last photo:
Join Date: Mar 2008
Location: Clear Water, FL
Posts: 97
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No objections... Sweet Ill go with this setup then.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 12-11-2008, 09:43 AM
Member
 
Last photo:
Join Date: Jun 2004
Location: TN
Posts: 434
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
The manual override switch is really convenient. My thermal switch seems to vary at what temp it activates the fans. Sometimes the engine temp gets above the set point and the fans don't immediately come on, so I can turn them on manually if I want.

Also, I drilled an extra hole in my dash panel and added a small amber light right under the temp gauge. Wired the light into the fan circuit so it comes on when the fans come on. I can't always hear the fans, so the light tells me whether they have come on or not.

By the way, I am running a 15 inch Cooling Components fan on the backside of the radiator, and a 12 inch Spal fan on the front of the AC cooler mounted in front of the radiator. Each is powered thru relays but controlled by one variable temp switch. 25 amp fuse on the big fan, 15 amp fuse on the small fan.

John
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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 for yourself.
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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cruise Control Compatibility with LED's? cboy Electrical 44 10-01-2010 12:08 PM
Electric fans not fanning when switched on lumberjacknooj Electrical 6 06-01-2007 02:13 AM
One wire or three wire? Screwy Lewy Electrical 0 06-30-2003 04:33 PM
Electric cooling fans. "Pusher" or "Puller"? NASCAR314 Engine 4 11-09-2002 04:06 AM
Electric Cooling Fans (CFM's) 41willys Engine 1 10-06-2002 05:10 AM


All times are GMT -6. The time now is 01:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.