Rear defroster doesnt work -

4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Thread Tools Search this Thread
Old 10-21-2009, 11:26 PM   #1
Thread Starter
Join Date: Sep 2009
Location: Washington
Posts: 2
Default Rear defroster doesnt work

On my 2000 Mustang GT my rear window defrost does not work. The button lights up but does not defrost the window. Also I put a multimeter up to the wires in the window and there is no voltage. If anyone can help i would really appreciate it. thanks
jwalk357 is offline   Reply With Quote
Old 10-22-2009, 08:39 AM   #2
Jazzer The Cat
Retired Moderator
Jazzer The Cat's Avatar
Join Date: Jun 2006
Location: SF Bay Area
Posts: 9,233

I was gonna suggest a multi-meter, but you have already done this. In some cases, the light that you see on the button is from a secondary power supply and could still be a fuse issue.

I can honestly say, in the 3+ years I have owned my car, I have never used the rear defroster and don't even know where the switch is located

Jazzer The Cat is offline   Reply With Quote
Old 10-27-2009, 10:12 PM   #3
Thread Starter
Join Date: Sep 2009
Location: Washington
Posts: 2
Default Fuses are good

I checked all my fuses under my hood and under the driver's side dash. All the fuses are fine. My next attempt when there is some daylight and I got time is Ill check the button to see if anythings wrong.
jwalk357 is offline   Reply With Quote
Old 10-28-2009, 03:26 AM   #4
Join Date: Oct 2009
Location: california
Posts: 22

when you say that you put the multi meter up to the wires in the window did you try doing that with a different ground as well, its a stupid question but i just want to check, because if there is a break in the element and you only connected the multi meter the the wires going to and from the window they would read no voltage even if there is a good feed! so if you did it this way then do it again but this time find a good ground then test both wires off that and see what happens.

if none of this works or applies and all the fuses are good then your going to need to remove the switch and test the back of it, if you have a good switch feed and no voltage at the window then the wiring is damaged!

good luck

kimlightningmcnulty is offline   Reply With Quote
Old 10-28-2009, 03:04 PM   #5
Resident Ford Troll
WhiteFoxGT's Avatar
Join Date: Jul 2006
Location: Delaware
Posts: 6,260

Check to make sure both soldered contacts are still attached to the rear window. Next, remove both wires (driver and passenger) then use your multi meter to ohm out the element on the back window. It should be somewhere under ~5 ohms I believe.

This might come in handy for you

WhiteFoxGT is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Did a few mods this summer... drfister 2005-2014 Mustangs 9 09-04-2015 08:47 AM
New guy here from SE Michigan movielover40 New Member Area 5 08-27-2015 11:13 PM
New member from Cali Tyoung68 New Member Area 7 08-25-2015 05:31 AM
Unidentified Rear Disc Brakes - Need Help!! Fast-Hands 5.0L (1979-1995) Mustang 2 08-19-2015 07:54 AM
Can you replace a plastic window with glass in 2010 GT Convertible? Mustang Sally72 2010-current S197 Appearance Section 10 08-11-2015 08:54 AM

2000, 2005, 2006, 50, defrost, defroster, electrical, ford, gt, issue, mustang, rear, rear window defrost, window, working, works

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

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 08:33 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.