'90 LX - all four power windows stopped at once - Mustang Evolution

Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1979-1995 Mustang GT



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 08-27-2015, 06:22 PM   #1
Registered Member
Regular
 
BossDrew's Avatar
 
Join Date: Dec 2014
Location: North Central
Region: West Virgina
Posts: 23
'90 LX - all four power windows stopped at once

1990 LX convertible with 5.0 - jumped in and rolled all four windows down and started my journey. Drove 20 miles and pulled into the garage. The windows would not go up - none of them. And the door locks wouldn't function. The next morning the windows went up a little then stopped halfway. I pulled the door panels and now the locks work, but the windows don't. That would indicate it's NOT the 20 amp circuit breaker, right? What the hell would make all four windows just stop working? Couldn't be a motor - all four would have had to die at the exact same time. Shouldn't be the circuit breaker because the locks work. I read something about making sure the negative terminal on the battery was mounted to the body to ensure full power - and it is. Where the hell do I start with this? Thanks a million!
__________________
_______________________________________
1990 LX Convertible / 25th Anniversary
BossDrew is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-28-2015, 11:11 AM   #2
Registered Member
Regular
 
BossDrew's Avatar
 
Join Date: Dec 2014
Location: North Central
Region: West Virgina
Posts: 23
Where could I find out more about the relays for the power windows? Any good sources for diagrams or troubleshooting steps? Thanks!
__________________
_______________________________________
1990 LX Convertible / 25th Anniversary
BossDrew is offline   Reply With Quote
Old 08-28-2015, 05:28 PM   #3
Registered Member
Regular
 
ebourd's Avatar
 
Join Date: Aug 2011
Region: Arizona
Posts: 51
It's wiring issue I believe I've had mine do that just randomly I have a gt I think it's from my bigfoot hitting the fuse panel

Sent from my SM-G900V using Mustang Evolution mobile app
ebourd is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-28-2015, 05:33 PM   #4
Registered Member
Regular
 
ebourd's Avatar
 
Join Date: Aug 2011
Region: Arizona
Posts: 51
90 lx convertible window wiring diagrams I Google this and got all the info you need

Sent from my SM-G900V using Mustang Evolution mobile app
ebourd is offline   Reply With Quote
Old 08-28-2015, 07:54 PM   #5
Registered Member
Regular
 
wbrockstar's Avatar
 
Join Date: Mar 2015
Location: Nashville
Region: Tennessee
Posts: 289
Check the following diagram out.#14 in the fuse panel is a circuit breaker for the power windows safety relay(used on convertible models only)This circuit breaker might be faulty,not allowing the windows to go up all the way.I believe it prevents the windows from rolling up past the halfway point when the top is being raised back to the closed position.If the top were to get misaligned with the windows while closing,they could get shattered.Im taking a guess here of course,but that sounds like a good purpose for the safety relay & circuit breaker.Locate #14 in the fuse panel on this diagram and follow it to the relay.It also goes towards fuse #15 too,so make sure its not blown.
Attached Thumbnails
Click image for larger version

Name:	90_Wire_Diag_3.jpg
Views:	662
Size:	107.9 KB
ID:	190228  
__________________
91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
wbrockstar is offline   Reply With Quote
Old 08-29-2015, 06:23 AM   #6
Registered Member
Regular
 
BossDrew's Avatar
 
Join Date: Dec 2014
Location: North Central
Region: West Virgina
Posts: 23
Wbrockstar - great info thanks. I'll start with that and see what happens. I think I found more on the relay also. Much appreciated!
__________________
_______________________________________
1990 LX Convertible / 25th Anniversary
BossDrew is offline   Reply With Quote
Old 08-29-2015, 08:53 AM   #7
Registered Member
Regular
 
ALMOST STOCK's Avatar
 
Join Date: Jul 2012
Location: Prunedale
Region: California
Posts: 366
The power window safety relay for the convertible is located here.
Attached Thumbnails
Click image for larger version

Name:	Power Window Relay for Convertible.jpg
Views:	318
Size:	43.1 KB
ID:	190248  
__________________
Mustang Monthly Jan 2015- Feature
5.0 Mustang & Super Fords July 2005
ALMOST STOCK is offline   Reply With Quote
Old 08-29-2015, 12:27 PM   #8
Registered Member
Regular
 
wbrockstar's Avatar
 
Join Date: Mar 2015
Location: Nashville
Region: Tennessee
Posts: 289
Great info Almost Stock.I didn't have the slightest clue where it was located,I just knew the wiring was shown running from that circuit breaker then on to the relay.Are there any other relays you can think of that might be located in that same area or close by,that you know of??When it comes to components and wiring under/inside or behind the dash,I'm totally lost.That's the reason I asked.
__________________
91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
wbrockstar is offline   Reply With Quote
Old 08-30-2015, 08:32 AM   #9
Registered Member
Regular
 
BossDrew's Avatar
 
Join Date: Dec 2014
Location: North Central
Region: West Virgina
Posts: 23
Spectacular Almost Stock! Thanks very much - I don't think I would have ever found that. Does it make sense to replace a working relay as a preventative measure? Or leave it alone if it's working fine? Thanks again!
__________________
_______________________________________
1990 LX Convertible / 25th Anniversary
BossDrew is offline   Reply With Quote
Old 08-30-2015, 09:10 AM   #10
Registered Member
Regular
 
wbrockstar's Avatar
 
Join Date: Mar 2015
Location: Nashville
Region: Tennessee
Posts: 289
Leave it to Ford,to put a relay under a damn speaker.Now,if somebody was trying to locate this thing and didn't have access to a wiring diagram,pictures or tech article (like shown in the previous post)it would be a very time consuming job to find this relay.Think about it,who's gonna search under a dash speaker for a damn relay,not me.
__________________
91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
wbrockstar is offline   Reply With Quote
Old 08-30-2015, 09:26 AM   #11
Registered Member
Regular
 
BossDrew's Avatar
 
Join Date: Dec 2014
Location: North Central
Region: West Virgina
Posts: 23
Quote:
Originally Posted by wbrockstar View Post
Leave it to Ford,to put a relay under a damn speaker.Now,if somebody was trying to locate this thing and didn't have access to a wiring diagram,pictures or tech article (like shown in the previous post)it would be a very time consuming job to find this relay.Think about it,who's gonna search under a dash speaker for a damn relay,not me.
Agreed! I'd been looking all over that panel around the fusebox with a flashlight. I even took the drivers seat out so I could climb under the dash and see in there better. Not sure I'da found that at all.
BossDrew is offline   Reply With Quote
Old 08-30-2015, 09:50 AM   #12
Registered Member
Regular
 
ALMOST STOCK's Avatar
 
Join Date: Jul 2012
Location: Prunedale
Region: California
Posts: 366
Quote:
Originally Posted by wbrockstar View Post
Great info Almost Stock.I didn't have the slightest clue where it was located,I just knew the wiring was shown running from that circuit breaker then on to the relay.Are there any other relays you can think of that might be located in that same area or close by,that you know of??When it comes to components and wiring under/inside or behind the dash,I'm totally lost.That's the reason I asked.
The only reason I found the window relay for the convertible was my EVTM has a location index and the one connectors C 417 says LH Cowl panel.
To my knowledge most of the relays are more explicit with there location in the Shop Manual or EVTM the Convertible for some reason seems to be a little bit more vague with some of there locations.
Attached Thumbnails
Click image for larger version

Name:	Convertible  Power Window Saftey Relay.JPG
Views:	657
Size:	58.2 KB
ID:	190298  
__________________
Mustang Monthly Jan 2015- Feature
5.0 Mustang & Super Fords July 2005
ALMOST STOCK is offline   Reply With Quote
Old 08-30-2015, 09:53 AM   #13
Registered Member
Regular
 
ALMOST STOCK's Avatar
 
Join Date: Jul 2012
Location: Prunedale
Region: California
Posts: 366
Quote:
Originally Posted by BossDrew View Post
Spectacular Almost Stock! Thanks very much - I don't think I would have ever found that. Does it make sense to replace a working relay as a preventative measure? Or leave it alone if it's working fine? Thanks again!
That's a tough call .. I'm inclined to leave things if they're working fine, but if there is any doubt in my mind at all I'll replace it.
__________________
Mustang Monthly Jan 2015- Feature
5.0 Mustang & Super Fords July 2005
ALMOST STOCK is offline   Reply With Quote
Old 09-05-2015, 06:18 AM   #14
Registered Member
Regular
 
BossDrew's Avatar
 
Join Date: Dec 2014
Location: North Central
Region: West Virgina
Posts: 23
'90 LX - all four power windows stopped at once

Thanks much. Replaced the circuit breaker after I found a door wire had been pierced by a door armrest bolt. All good now! Easy peasy.
__________________
_______________________________________
1990 LX Convertible / 25th Anniversary
BossDrew is offline   Reply With Quote
Old 09-05-2015, 02:19 PM   #15
Registered Member
Regular
 
wbrockstar's Avatar
 
Join Date: Mar 2015
Location: Nashville
Region: Tennessee
Posts: 289
Quote:
Originally Posted by BossDrew View Post
Thanks much. Replaced the circuit breaker after I found a door wire had been pierced by a door armrest bolt. All good now! Easy peasy.
Glad to hear you got it fixed so easily & quickly.Otherwise you might have been up to your ears in dash wiring trying to track the problem down.
Hey you stoled those words from "Brooks" that starred in Shawshank Redemption,except you left a word out....lol
Your project was definitely
"Easy Peasy Japanesee" lol
__________________
91 LX 342ci(10.5:1)
TFS 190cc(stage ll)
TFS track heat
XE276HR .544" .544"
Flowtech 1 3/4"
Prochamber w FM
wbrockstar is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 1979-2015 Mustang GT || Tech and Talk > 1979-1995 Mustang GT

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 On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Driver power window stopped working etihw 1996-2004 Mustang GT 5 08-10-2015 01:08 PM
Radio stopped, also Speedometer and Power Door Locks cor66vette Mustang Audio & Video 3 12-06-2014 02:22 PM
All power drained at once? SpeedyG Pre-2005 V6 Mustang 29 09-20-2013 04:36 PM
9.5" on all four corners? My car? Doable? nosympathy 2011-2014 Mustang GT 34 03-14-2013 12:12 PM

» Like Us On Facebook



08:48 AM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.