C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Driver's side door lock

Thread Tools
 
Search this Thread
 
Old 10-25-2005, 04:14 PM
  #1  
ob1vette
Navigator
Thread Starter
 
ob1vette's Avatar
 
Member Since: Apr 2005
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default Driver's side door lock

My driver side door lock only works manually. It will unlock with remote fob and by pressing unlock button on door. the dealer wants $600.00 to replace "door module". 99 roaster
Old 10-25-2005, 04:32 PM
  #2  
screw991le
Race Director
 
screw991le's Avatar
 
Member Since: Sep 2004
Location: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
Posts: 17,786
Likes: 0
Received 3 Likes on 3 Posts
St. Jude Donor '06-'07-'08-'09-'10-'11-'12

Default

Get a used one on ebay or from Gene from Karshop. DYI
Old 10-25-2005, 04:49 PM
  #3  
Evil-Twin
Team Owner

 
Evil-Twin's Avatar
 
Member Since: Mar 2001
Location: small town in S.E Pa. PA
Posts: 21,325
Received 3,812 Likes on 1,925 Posts
St. Jude Donor '03-'04

Default

Wow list price on the part is 239.... install is less than an hour...
Dealer wants 360 for an hours work...That's freekin amazing

Old 10-25-2005, 08:55 PM
  #4  
alanh
Burning Brakes
 
alanh's Avatar
 
Member Since: Oct 1999
Location: Rogers, AR, USA
Posts: 920
Likes: 0
Received 1 Like on 1 Post
Default

You can cut a 3/8 square hole in the top center circut board ends of the relay's, which are located on the module circut board. The case is thin plastic and will cut easily with an exacto knife. This will expose the contacts for the solenoids.
Stick emery cloth inbetween the contacts, press the contact points closed with something small like a toothpick and pull the emery cloth out. A few times of this and the contacts will be clean. Tape the hole over and put everything back together. Mine's been working fine since the cleaning of the contact points.



Last edited by alanh; 01-02-2006 at 06:31 PM.
The following users liked this post:
ckreider33 (04-08-2024)
Old 10-25-2005, 09:04 PM
  #5  
Lovin It!!! - C5
Racer
Support Corvetteforum!
 
Lovin It!!! - C5's Avatar
 
Member Since: Oct 2005
Location: Haw River North Carolina
Posts: 351
Likes: 0
Received 0 Likes on 0 Posts
Default

Wow! Awesome info!
Old 10-26-2005, 08:59 PM
  #6  
RonJ
Burning Brakes
 
RonJ's Avatar
 
Member Since: Oct 2003
Location: Foresters Falls(near Ottawa) Ont
Posts: 1,106
Likes: 0
Received 1 Like on 1 Post

Default

Originally Posted by alanh
You can cut a 3/8 square hole in the top center circut board ends of the relay's, which are located on the module circut board. The case is thin plastic and will cut easily with an exacto knife. This will expose the contacts for the solenoids.
Stick emery cloth inbetween the contacts, press the contact points closed with something small like a toothpick and pull the emery cloth out. A few times of this and the contacts will be clean. Tape the hole over and put everything back together. Mine's been working fine since the cleaning of the contact points.

Hi Alan ..... good info. The picture doesn't show for me, just a red X. I tried to go right to your host .. get a forbidden message.

Could you please try to post it again or send me the pic???

Thanks .... RonJ ...
Old 10-26-2005, 09:43 PM
  #7  
feeder82
Melting Slicks
 
feeder82's Avatar
 
Member Since: Mar 2005
Location: Wisconsin
Posts: 3,460
Received 981 Likes on 624 Posts

Default

I have seen a bunch of posts on this issue, my 02 is doing the same thing, these modules must be very failure prone. a couple of the other posts suggested a weak battery. the drill out tip sounds like one to try
BUT I HATE REMOVING DOOR PANELS, I have never pulled 1 without busting a couple of clips. and yes i use the little flat tool
The following users liked this post:
ckreider33 (04-08-2024)
Old 10-26-2005, 10:22 PM
  #8  
alanh
Burning Brakes
 
alanh's Avatar
 
Member Since: Oct 1999
Location: Rogers, AR, USA
Posts: 920
Likes: 0
Received 1 Like on 1 Post
Default

Old 10-26-2005, 10:33 PM
  #9  
SteveDoten
Le Mans Master
 
SteveDoten's Avatar
 
Member Since: Sep 2003
Location: Farmington CT
Posts: 6,125
Received 160 Likes on 125 Posts
Cruise-In VII Veteran

Default

i like it, very nice fix
Old 10-26-2005, 10:36 PM
  #10  
SteveDoten
Le Mans Master
 
SteveDoten's Avatar
 
Member Since: Sep 2003
Location: Farmington CT
Posts: 6,125
Received 160 Likes on 125 Posts
Cruise-In VII Veteran

Default

Originally Posted by ob1vette
My driver side door lock only works manually. It will unlock with remote fob and by pressing unlock button on door. the dealer wants $600.00 to replace "door module". 99 roaster
so it won't LOCK when you hit the lock button? this is my problem also on my 99frc, the fob locks and unlocks and the pass switch will lock, but the lock button on the drivers switch does nothing
Old 10-26-2005, 10:45 PM
  #11  
alanh
Burning Brakes
 
alanh's Avatar
 
Member Since: Oct 1999
Location: Rogers, AR, USA
Posts: 920
Likes: 0
Received 1 Like on 1 Post
Default

A little additional information on the relay's would be helpful. There is one relay to pull the solenoid down to lock the door. There is a second relay that reverses the polarity and pulls the solenoid up to unlock the door. The solenoid pulls quite a bit of current and creates a significant electrical arc across the contact points each time the relay is activated. This large arc can leave a carbon deposit on the contacts that will sometimes insulate the contacts from each other, resulting in a locking or unlocking action that will no longer work. A few strokes of the emry cloth, on both contacts, will usually clean the deposits away and every thing will work normally.
Old 10-27-2005, 09:48 PM
  #12  
RonJ
Burning Brakes
 
RonJ's Avatar
 
Member Since: Oct 2003
Location: Foresters Falls(near Ottawa) Ont
Posts: 1,106
Likes: 0
Received 1 Like on 1 Post

Default

Many thanks for the pics Alan!!!

Another task to do over the winter!!!

RonJ ...
Old 10-28-2005, 12:31 PM
  #13  
chuck1026
Le Mans Master
 
chuck1026's Avatar
 
Member Since: May 2000
Location: Syracuse NY
Posts: 5,265
Received 14 Likes on 6 Posts
Cruise-In II Veteran

Default

Great pictures!

Is there any way to modify the circuit to prevent this arcing? My D/S module has advanced from unlock to both unlock and lock being intermittent .
Old 11-02-2005, 12:13 AM
  #14  
SteveDoten
Le Mans Master
 
SteveDoten's Avatar
 
Member Since: Sep 2003
Location: Farmington CT
Posts: 6,125
Received 160 Likes on 125 Posts
Cruise-In VII Veteran

Default

this thread is saving people hundreds of dollars in door control modules every week
Old 11-02-2005, 12:49 AM
  #15  
bindy
Advanced
 
bindy's Avatar
 
Member Since: Jul 2004
Location: South Jordan UT
Posts: 88
Likes: 0
Received 0 Likes on 0 Posts

Default Here's the fix

I have had several of these door control modules go "bad" on my '01 and '02. After reading others posts regarding failure, I decided to tear one apart to see for myself what goes wrong. Here's a picture of the passenger side relay (ripped open) for the door lock that stopped working - just as suspected - BURNT CONTACTS!!!



Here's a direct 12 volt - 5 pin replacement relay with the exact same external dimensions. A little solder wick and a soldering iron and they come out very easily. Should take less than an hour to do, including removing the door panel.

Look at the invoice from Digi-Key for the part number - only $1.30 each (plus shipping of course).





Old 11-02-2005, 09:54 AM
  #16  
SteveDoten
Le Mans Master
 
SteveDoten's Avatar
 
Member Since: Sep 2003
Location: Farmington CT
Posts: 6,125
Received 160 Likes on 125 Posts
Cruise-In VII Veteran

Default

bindy just made the thread even better, NICE FIX!! 11.50!! beats the deductible at the dealer or the couple hundred for a new door module
Old 11-02-2005, 11:41 AM
  #17  
bindy
Advanced
 
bindy's Avatar
 
Member Since: Jul 2004
Location: South Jordan UT
Posts: 88
Likes: 0
Received 0 Likes on 0 Posts

Default

I tore one open several months ago and filed the contacts, but unfortuantely that fix didn't last long. After finding the correct sized part, it was a no brainer to just replace it

Get notified of new replies

To Driver's side door lock

Old 11-09-2005, 12:57 PM
  #18  
jbvmag
4th Gear
 
jbvmag's Avatar
 
Member Since: Oct 2005
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Default Awesome Info!

This forum ROCKS! Thanks to all who take the time and pics to share all this info.
Old 11-09-2005, 07:07 PM
  #19  
ptiller
Advanced
 
ptiller's Avatar
 
Member Since: Dec 2004
Location: Acworth GA
Posts: 83
Likes: 0
Received 0 Likes on 0 Posts

Default

Excellent Thread!!!

In the pics, the lock-relay looks different in size/shape from the unlock relay. Are these same spec relays? I can not make out the part marking on the unlock relay. I would like to replace both, so I am looking for a make and part number for the unlocking relay or a good sub.

Also, any details on replacing (make & part number, a sub is welcome too ) the relays that control the windows (up / down ). If we can get these three items, It would make this thread a definite sticky!!!
Old 11-09-2005, 08:36 PM
  #20  
alanh
Burning Brakes
 
alanh's Avatar
 
Member Since: Oct 1999
Location: Rogers, AR, USA
Posts: 920
Likes: 0
Received 1 Like on 1 Post
Default

Both relay's are the same. In my picture, the unlocking relay has electrical tape over it and the locking relay hasn't been taped over yet.


Quick Reply: Driver's side door lock



All times are GMT -4. The time now is 05:38 AM.