fan indicator light - 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 11-17-2008, 10:09 PM
CARGUY's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: granite city,illinois
Age: 40
Posts: 180
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
fan indicator light

what would be the best way to wire a indicator light to the electric fan to let me know the fan is actually on [i have it wired with a relay]

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-17-2008, 10:33 PM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,839
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
The easiest way is to just use an illuminated switch, but that really will not tell you the fan is running, only that it's getting power. Unless the fan has some kind of feedback signal I don't know of any other way..

Vince
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-18-2008, 09:32 AM
CustomConspiracy's Avatar
Registered User
 
Join Date: Dec 2007
Location: Winston-Salem NC
Age: 61
Posts: 167
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Indicator light

I am more of a Painter than an electrician but I kinda wanted the same thing you are looking for.
My guess is ya have to find the spot between the little control box that tells the fan what to do, and the actual fan motor. When juice travels from that relay to the fan .....the fan runs.
If ya stick a light in between the source of power, and the , motor then the light gets power when the fan does......I think?
The other question is......if you run it like that.....you may need to be careful that the light can handle all the load that is traveling thru it to get to the motor.
Now that you have read all that......you know why I am a painter and not an electrician.....LOL
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-18-2008, 09:39 AM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,839
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
Sorry, but that will not work, any light you place into the power feed to the fan motor will reduce the power level to such the fan will not run. Short of having some direct information (running) feedback the only legitimate way to do it would be an illuminated (led) switch.

Vince
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-18-2008, 10:26 AM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,415
Wiki Edits: 31

Thanks: 2
Thanked 61 Times in 57 Posts
wire it paralell to the fan from the relay to ground. you can't do it in series but paralell would be fine
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-18-2008, 10:48 AM
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
The easiest way to attach a light would be find the lead to the relay from the water sensor unit. The sensor is a grounding unit that supplies the ground to the fan relay. When the sensor attains the set temperature it closes. This works like a ground wire from the relay. When the sensor closes it will complete the coil circuit causing the relay to close turning on the fan.

If your run a positive wire to the light, then run the other pigtail (ground wire) to the lead going to the temperature sensor.

When the sensor supplies ground to the fan relay, it will also provide ground to the indicator light.

Frank
Attached Thumbnails
Click image for larger version

Name:	PB070049.JPG
Views:	62
Size:	85.6 KB
ID:	34265   Click image for larger version

Name:	PA250017.JPG
Views:	70
Size:	90.0 KB
ID:	34266  
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-18-2008, 10:56 AM
Frisco's Avatar
Glad To Be Here
 
Last photo:
Join Date: Nov 2002
Location: Canton, North Carolina
Age: 73
Posts: 2,244
Wiki Edits: 0

Thanks: 0
Thanked 8 Times in 8 Posts
I ran an electric cooling fan full time when the ignition switch was turned on in the '28 Ford pickup that is my avatar.

To be sure that the fan had power running to it when the ignition switch was turned on; I wired in an "icecube" relay from Square D (I worked for them at the time). It was wired so that if the fuse going to the fan ever blew out, an indicator light would light up in the dash to alert me off the loss of power to the fan. That relay and its mounting base are still available from electrical supply business.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-18-2008, 01:39 PM
lg1969's Avatar
Google "Tunnel Ram 406"
 
Last photo:
Join Date: Oct 2007
Location: Bohemia, L.I.N.Y.
Age: 64
Posts: 1,059
Wiki Edits: 0

Thanks: 1
Thanked 21 Times in 18 Posts
I happen to be a eng. tech. I did that when the fuse blow open the light would come on. Just connect a small 12V bulb across the fuse. The same bulb used on the dash. You will need an insulated socket.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 11-18-2008, 05:48 PM
Registered User
 
Join Date: Aug 2006
Location: Alexandria, VA
Posts: 1,764
Wiki Edits: 0

Thanks: 4
Thanked 66 Times in 64 Posts
You could try this wiring scheme, but leave out the yellow light (green lights up when fan is on).

Bruce

http://www.classictruckshop.com/club...osch/relay.htm
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
building a fan shroud - need help 32Tudor Hotrodding Basics 30 07-03-2008 10:01 PM
Correct size & type of radiator fan & clutch? Steve S Engine 3 12-04-2006 11:29 AM
Electric cooling fan Z-Money Pit Engine 1 08-29-2006 09:27 PM
Need advice on a good electric fan set up. Streetmaster Engine 13 01-07-2006 03:37 PM
? about an electric fan for PU. Streetmaster Engine 8 08-20-2005 11:14 PM


All times are GMT -6. The time now is 08:06 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.