Wiring, Stereo & Electronics Audio Components | Radars | Alarms - and things that spark when they shouldn't

Express down module (EDM) shot?

Thread Tools
 
Search this Thread
 
Old Jul 11, 2008 | 09:46 PM
  #1  
_JB_'s Avatar
Thread Starter
TECH Junkie
20 Year Member
Photoriffic
Community Favorite
iTrader: (33)
 
Joined: Sep 2004
Posts: 3,762
Likes: 25
From: Tampa, FL
Default Express down module (EDM) shot?

Well after doing some research, I think my express down module is shot. I rolled my driver side window down today and now it will not go up. I can still operate the passenger side window from the driver-side window control which has made be believe its express down module related.

I can hear the EDM relay click when I press the driver window button down, and if I time it right and press the up button the EDM makes a buzz sound for a second.The driver's window has worked flawless the three years I've had the car; no skipping, studders, slow speed, ect. I've taken the EDM apart and I don't see anything loose on the board.

So can anyone confirm my hypothesis? Anyway to bypass the EDM too make sure the window motor still operates?
Reply
Old Jul 12, 2008 | 09:15 AM
  #2  
wssix99's Avatar
Save the manuals!
15 Year Member
iTrader: (5)
 
Joined: Dec 2007
Posts: 12,967
Likes: 389
From: Chicago, IL
Default

Your window motor is shot. You are in a classic bad motor situation. Your EDM has always clicked. You have just never heard it before because your motor has been running. (The window motors are known to just up-and-die without warning. I've had several die like this.)

You can take a voltmeter, take the door apart, take the door speaker out, and unhook the electrical connector from the window motor. Attach the voltmeter leads to the motor connector and operate the window switch. If you see 12V at the connector, it will confirm that the EDM and circuitry is good and the motor is bad.
Reply
Old Jul 12, 2008 | 02:20 PM
  #3  
_JB_'s Avatar
Thread Starter
TECH Junkie
20 Year Member
Photoriffic
Community Favorite
iTrader: (33)
 
Joined: Sep 2004
Posts: 3,762
Likes: 25
From: Tampa, FL
Default

Originally Posted by wssix99
Your window motor is shot. You are in a classic bad motor situation. Your EDM has always clicked. You have just never heard it before because your motor has been running. (The window motors are known to just up-and-die without warning. I've had several die like this.)

You can take a voltmeter, take the door apart, take the door speaker out, and unhook the electrical connector from the window motor. Attach the voltmeter leads to the motor connector and operate the window switch. If you see 12V at the connector, it will confirm that the EDM and circuitry is good and the motor is bad.
Yep, you were correct! I borrowed a new Dorman motor from a local part store here and plugged in the new motor and it worked. Its all back together now and the window moves a little faster than what I remember. Thanks!
Reply
Old Jul 17, 2008 | 07:44 AM
  #4  
SilverSmoke's Avatar
TECH Enthusiast
 
Joined: Oct 2002
Posts: 571
Likes: 0
From: NJ
Default

Do you have to remove the door speaker to get to the plug and motor? That would be a nightmare to do in my application currenlty.
Reply
Old Jul 17, 2008 | 09:05 AM
  #5  
_JB_'s Avatar
Thread Starter
TECH Junkie
20 Year Member
Photoriffic
Community Favorite
iTrader: (33)
 
Joined: Sep 2004
Posts: 3,762
Likes: 25
From: Tampa, FL
Default

I'm not sure if you could get to the motor and plug without removing the door speaker. I know it made it much easier though.
Reply
Old Jul 17, 2008 | 11:07 AM
  #6  
wssix99's Avatar
Save the manuals!
15 Year Member
iTrader: (5)
 
Joined: Dec 2007
Posts: 12,967
Likes: 389
From: Chicago, IL
Default

Originally Posted by SilverSmoke
Do you have to remove the door speaker to get to the plug and motor? That would be a nightmare to do in my application currenlty.
Its possible if you've got very long arms, small hands, and don't mind getting cut. (I was able to do it once but it took forever and I got all cut up. I couldn't actually reach with my hands. Had to use mirrors and pliers to do it.)
Reply
Old Jul 17, 2008 | 01:46 PM
  #7  
billyb's Avatar
TECH Resident
15 Year Member
Photogenic
Photoriffic
iTrader: (15)
 
Joined: Mar 2006
Posts: 962
Likes: 0
From: fl.
Default edm

hi can you tell me where the edm is located?? my express down doesn't work the window works fine just not the express down feature, thanks billyb
Reply
Old Jul 17, 2008 | 07:01 PM
  #8  
_JB_'s Avatar
Thread Starter
TECH Junkie
20 Year Member
Photoriffic
Community Favorite
iTrader: (33)
 
Joined: Sep 2004
Posts: 3,762
Likes: 25
From: Tampa, FL
Default

Originally Posted by billyb
hi can you tell me where the edm is located?? my express down doesn't work the window works fine just not the express down feature, thanks billyb
Its almost behind the radio, on the driver's side. It will be in the plastic cover on the firewall. You can hear the relay click when you press up on the driver window switch. Its a black box the size of a wallet.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jul 21, 2008 | 06:08 PM
  #9  
autotrix's Avatar
Closed ex-Sponsor Account
iTrader: (5)
 
Joined: Nov 2006
Posts: 461
Likes: 0
From: Tulsa, OK
Default

Here is a picture of where the factory module is stored. Located exactly where above poster mentioned.


We sell replacement express modules for both sides at our website.
Reply
Old Jul 21, 2008 | 07:59 PM
  #10  
01 Sunset SS's Avatar
Teching In
 
Joined: Jun 2005
Posts: 32
Likes: 0
From: Land O Lakes/Tampa, Florida
Default

I may be having tha same problem. My window motor died 3 months ago. I got a new one replaced by lifetime warranty (doorman motor). It doesn't work at all now. I have taken the motor out held it in my hand it it worked. I even put in a brand new one in and nothing happens. I do here the click under the dash. I even checked my scissor track to see if it was binding and it moves worry free. Help I even bought a new window switch in case that was the problem. Even my fuses are ok
Reply
Old Jul 21, 2008 | 09:48 PM
  #11  
01 Sunset SS's Avatar
Teching In
 
Joined: Jun 2005
Posts: 32
Likes: 0
From: Land O Lakes/Tampa, Florida
Default

Hey guys never mind my above post. I found my issue. My connector plug to the window motor was not making the proper connection. The tabs on the black plug had become spread apart just far enough to not make the connection. I pressed them together with some needle nose pliers and wouldn't you know it my window works like normal again.
Reply




All times are GMT -5. The time now is 06:51 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE