Search



Go Back   MustangForums.com > Ford Mustang Tech > Classic Mustangs (Tech)
Sign in using an external account
Register Forgot Password?
Search

Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 11-10-2010, 01:22 PM   #1
unit91
3rd Gear Member
 
unit91's Avatar
 
Join Date: Oct 2006
Vehicle: 1968 Mustang convertible
Location: Virginia
Posts: 861
Question How to Test Heater Blower, Switch, Resistor

Asked these questions on General Tech, got many views but no responses. I have removed the complete heater assembly from my 68. The blower has two wires (brown and yellow) coming from it, and the switch is 3-speed. How can I test the blower motor, resistor, and switch to see what is failing to work?
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
unit91 is offline   Reply With Quote
Old 11-10-2010, 09:07 PM   #2
tx65coupe
5th Gear Member
 
tx65coupe's Avatar
 
Join Date: Dec 2008
Vehicle: 1965 Ford Mustang
Location: Texas
Posts: 4,408
Default

First I would check the fuse. Then see if there is power at the blower motor at all the different speeds. Use a test light or multimeter. You could also hook up the blower motor directly to the battery and see if it runs. Next check to see if there is power at the resistor and then see if there is power at the switch.
__________________
1997 Cobra Convertible (stock)
1965 Mustang 302, T5, Versailles 9 Inch


tx65coupe is offline   Reply With Quote
Old 11-11-2010, 11:40 AM   #3
unit91
3rd Gear Member
 
unit91's Avatar
 
Join Date: Oct 2006
Vehicle: 1968 Mustang convertible
Location: Virginia
Posts: 861
Default

OK. If you have the time, can you explain exactly how to do those tests? Like connect what to what, etc., etc.. If the motor isn't the problem I don't want to connect it improperly and end up screwing it up myself. I sure would appreciate it.
unit91 is offline   Reply With Quote
Old 11-11-2010, 12:23 PM   #4
69mach1377
5th Gear Member

 
69mach1377's Avatar
 
Join Date: Aug 2004
Vehicle: 69 Mach1
Location: ABQ, NM, USA
Posts: 2,174
Default

This is where a schematic would be helpful.
__________________
69Mach1 - warmed up 395W and Gforce T5 with hydraulic clutch, 3.50:1 posi, rack&pinion/tilt, 17x8/235s (2003) Mach1 Rims front & 17x9/275s rear, all MSD, Holley 750, custom paint, Shelby drop, Hotwheels scale is 1 to 1.
http://photobucket.com/albums/v618/danaranda/69stang
69mach1377 is offline   Reply With Quote
Old 11-11-2010, 03:36 PM   #5
tx65coupe
5th Gear Member
 
tx65coupe's Avatar
 
Join Date: Dec 2008
Vehicle: 1965 Ford Mustang
Location: Texas
Posts: 4,408
Default

Just use a multimeter or test light with probes on the end to see if you get power with the light or how many volts with the multimeter. You need to unplug it and probe the terminals at the connector.

Try looking here for schematics. There is additional wiring info here.

http://www.hammar.dyndns.org/~djhamm...wiring1968.htm

Click the image to open in full size.
__________________
1997 Cobra Convertible (stock)
1965 Mustang 302, T5, Versailles 9 Inch


tx65coupe is offline   Reply With Quote
Old 11-11-2010, 04:59 PM   #6
69mach1377
5th Gear Member

 
69mach1377's Avatar
 
Join Date: Aug 2004
Vehicle: 69 Mach1
Location: ABQ, NM, USA
Posts: 2,174
Default

Excellent!
__________________
69Mach1 - warmed up 395W and Gforce T5 with hydraulic clutch, 3.50:1 posi, rack&pinion/tilt, 17x8/235s (2003) Mach1 Rims front & 17x9/275s rear, all MSD, Holley 750, custom paint, Shelby drop, Hotwheels scale is 1 to 1.
http://photobucket.com/albums/v618/danaranda/69stang
69mach1377 is offline   Reply With Quote
Old 11-11-2010, 08:00 PM   #7
unit91
3rd Gear Member
 
unit91's Avatar
 
Join Date: Oct 2006
Vehicle: 1968 Mustang convertible
Location: Virginia
Posts: 861
Default

Great! Thanks a million!
unit91 is offline   Reply With Quote
Old 11-12-2010, 05:16 PM   #8
tx65coupe
5th Gear Member
 
tx65coupe's Avatar
 
Join Date: Dec 2008
Vehicle: 1965 Ford Mustang
Location: Texas
Posts: 4,408
Default

Your welcome. I hope that helps.
__________________
1997 Cobra Convertible (stock)
1965 Mustang 302, T5, Versailles 9 Inch


tx65coupe is offline   Reply With Quote
Old 11-14-2010, 10:47 AM   #9
unit91
3rd Gear Member
 
unit91's Avatar
 
Join Date: Oct 2006
Vehicle: 1968 Mustang convertible
Location: Virginia
Posts: 861
Default

OK. I hooked the system up while it was out of the car according to the wiring diagram. If I hook the blower directly to the battery it works, only one speed of course, sometimes it's pretty quiet and sometimes depending on the angle I'm holding it at it's pretty noisy.
When I use the switch, sometimes I get 2 speeds (lo & hi), sometimes I get all 3 speeds, sometimes I get nothing.
unit91 is offline   Reply With Quote
Old 11-16-2010, 12:53 AM   #10
tx65coupe
5th Gear Member
 
tx65coupe's Avatar
 
Join Date: Dec 2008
Vehicle: 1965 Ford Mustang
Location: Texas
Posts: 4,408
Default

That sounds like either the switch is dirty or the blower resistor is bad.
__________________
1997 Cobra Convertible (stock)
1965 Mustang 302, T5, Versailles 9 Inch


tx65coupe is offline   Reply With Quote
Old 11-16-2010, 12:53 AM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
1999, 2006, blower, blowing, cars, cobra, front, heater, motor, mustang, resistor, rheostat, switch, test, testing

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 12:51 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup