Go Back   LS1TECH > CHASSIS, SUSPENSION, APPEARANCE > General Maintenance & Repairs
Sign in using an external account
Register Forgot Password?
Search

General Maintenance & Repairs
Leaks | Squeaks | Clunks | Rattles | Grinds
Sponsored by
Gearstar Performance Transmissions

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

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, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 03-15-2008, 06:16 PM   #1
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Dec 2005
Posts: 14
Default LS1 Body Control Module Problems - The Fix

Not sure which Forum this should be under so please feel free to move this and delete this sentence.

I've had 3 LS1 cars over the past few years that had intermitent body control module problems. When your radio and power windows intermitently go on and off, it's a body control module problem. This must be somewhat common and most people probably don't know where the problem lies.

Today I took a shot at trying to fix the module itself as buying a new one is around $200. You can buy a used one but then you have to know the VIN of the car it came out of so you can get the VATS code and make a new ignition key for your car that matches the used BCM.

The BCM is located on the passenger side under the dash just behind the glove box. To my surprise, the entire circuit board is just sitting inside a black plastic box that unsnaps. Unsnap the box and remove the entire circuit board. I was able to isolate the problem to the main power circuit/plug-in. After playing the wiggle-parts game, I found that the relay just behind the plug was the problem. There are 5 solder joints holding the relay onto the board. One solder joint looked like it had a super tiny micro-crack in it. I heated that one solder joint and added some additional solder and whaddayaknow !!!! it fixed it ! Your mileage may vary but I would reheat each of the 5 solder joints.

Here is a picture of the circuit board with the 5 solder joints crudely circled. The bottom joint was my problem.

Just thought you guys would like to see this.

Greg Crowe
http://www.camarofirebird.com

Click the image to open in full size.
Click the image to open in full size.

Last edited by Racr_X; 10-31-2008 at 04:21 PM..
Racr_X is offline   Reply With Quote
Old 03-15-2008, 09:41 PM   #2
TECH Addict
1998 Chevrolet Camaro
 
CJDZ24_Z28's Avatar
 
Trader Rating: 74
Join Date: Aug 2005
Location: South Jersey (15 miles from Atlantic City)
Posts: 2,152
Send a message via AIM to CJDZ24_Z28 Send a message via Yahoo to CJDZ24_Z28
Default

EXCELLENT! I posted about this problem I had with a car i sold. Good Post!
__________________
CJ/33/blk male
2005 Chevrolet Corvette M6(Black)
1998 Chevrolet Camaro Z28 M6(Arctic white)
2002 Chevrolet Tahoe 5.3L(Pewter)


PAST LSX-00(LPM)C5 FRC M6/99(Blk) C5 FRC M6/99(BLK)Z28 M6/99(NBM)SS M6/01(BLK)SS M6/99(NBM)B4C A4/98(BLK)TA A4/98(BGM)Z28 M6/00Formula(pwtr)M6/00 TA WS6(BLK)M6/00(BLK)Formula M6/00(MMM)Z28 M6/98Formula(BGM)M6/98 TA WS6(Blk)M6/99 +1
CJDZ24_Z28 is offline   Reply With Quote
Old 03-16-2008, 01:11 PM   #3
Staging Lane
Garage is empty, add now
 
Trader Rating: 3
Join Date: Jan 2008
Location: camp lejeune nc
Posts: 79
Send a message via AIM to foxriderry
Default

nut how do i take the board out ... i cant unclip the box... sheb some light? ... thanks for finding this for me carlton
foxriderry is offline   Reply With Quote
Old 03-16-2008, 01:24 PM   #4
10 Second Moderator
Garage is empty, add now
 
Torkman15's Avatar
 
Trader Rating: 2
Join Date: Feb 2004
Location: Mid Michigan
Posts: 558
Default

Quote:
Originally Posted by Racr_X View Post
Not sure which Forum this should be under so please feel free to move this and delete this sentence.

I've had 3 LS1 cars over the past few years that had intermitent body control module problems. When your radio and power windows intermitently go on and off, it's a body control module problem. This must be somewhat common and most people probably don't know where the problem lies.

Today I took a shot at trying to fix the module itself as buying a new one is around $200. You can buy a used one but then you have to know the VIN of the car it came out of so you can get the VATS code and make a new ignition key for your car that matches the used BCM.

The BCM is located on the passenger side under the dash just behind the glove box. To my surprise, the entire circuit board is just sitting inside a black plastic box that unsnaps. Unsnap the box and remove the entire circuit board. I was able to isolate the problem to the main power circuit/plug-in. After playing the wiggle-parts game, I found that the relay just behind the plug was the problem. There are 5 solder joints holding the relay onto the board. One solder joint looked like it had a super tiny micro-crack in it. I heated that one solder joint and added some additional solder and whaddayaknow !!!! it fixed it ! Your mileage may vary but I would reheat each of the 5 solder joints.

Here is a picture of the circuit board with the 5 solder joints crudely circled. The bottom joint was my problem.

Just thought you guys would like to see this.

Greg Crowe
http://www.camarofirebird.com

Click the image to open in full size.
Click the image to open in full size.
Good information!! This should be stickied somewhere...
__________________
2000 Millenium Yellow Corvette M6 LS3 transplant recipient...SNORTS!
1999 TransAm LS1 Auto for now...LS9-M6 transplant victim??? Sounds good
1998 TransAm LS1 Auto stock but not slow
2005 CCSB Duramax 6in RCD, 325s never ending torque!
1968 Chevelle currently under the knife, LS6/T-56 Magnum swap underway.
Torkman15 is offline   Reply With Quote
Old 03-16-2008, 04:36 PM   #5
Garage is empty, add now
 
Rowin Gearz's Avatar
 
Trader Rating: 3
Join Date: Jul 2004
Location: Indianapolis, IN
Posts: 341
Default

+1 on that! I had a BCM problem on my '99 SS 3 years ago. I suck with electrical stuff. It's just not something I like to mess with. I got raped by the Chevy dealer for $400 bucks to fix the thing. I also got the witness the porter rev the heck out of my car and ride the clutch like his left foot was welded to the clutch pedal I'm glad I have been able to do everything else on my cars other than wheels/tires, i'm so paranoid about random people driving my stuff.
__________________
'03 Black Corvette Z06 Vararam intake TSP LT's and OR-X
'01 Arctic White Camaro SS M6 #1887 ('07 Power Tour car)
Exhaust and Suspension mods...TSP 233/239 600/605 113 LSA
'99 Bright Rally Red Camaro SS M6
408 stroker T-REX cam AFR 225's FAST 90/90 150 shot
'05 F250 Crew 4X4 Lariat SWB Oxford White/Gray 6.0 Powerstroke Diesel 4" Turbo back, SCT Tune, K&N CAI
Rowin Gearz is offline   Reply With Quote
Old 03-17-2008, 11:27 AM   #6
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Dec 2005
Posts: 14
Default

Deleted

Last edited by Racr_X; 10-31-2008 at 04:21 PM..
Racr_X is offline   Reply With Quote
Old 03-17-2008, 11:54 AM   #7
TECH Addict
Garage is empty, add now
 
qwk93ta's Avatar
 
Trader Rating: 13
Join Date: Jun 2004
Location: Fairfield, Ohio
Posts: 2,246
Default

Is this part of the car's computer??
__________________
00 WS6 A4
Lid, LM1, ported TB, tune, SFCs and LCAs.
13.03 @ 107.77 2.029 60' (10/17/09)

New (4/2010) 6.0L, stock 317 heads, torquer V2 cam, Kooks, pulley, LS6 intake, Performabuilt L2 tranny and a 3600 stall. No track times yet.
qwk93ta is offline   Reply With Quote
Old 03-17-2008, 06:44 PM   #8
TECH Senior Member
Garage is empty, add now
 
01ssreda4's Avatar
 
Trader Rating: 87
Join Date: Aug 2007
Location: Turnin' Wrenches Infractions: 005
Posts: 19,053
Default

great fix
__________________

01 SS Rally Red A4 #4987, 04 Yukon XL Denali, 99 Cadillac STS-SOLD
01ssreda4 is online now   Reply With Quote
Old 03-18-2008, 08:51 AM   #9
TECH Addict
1998 Chevrolet Camaro
 
CJDZ24_Z28's Avatar
 
Trader Rating: 74
Join Date: Aug 2005
Location: South Jersey (15 miles from Atlantic City)
Posts: 2,152
Send a message via AIM to CJDZ24_Z28 Send a message via Yahoo to CJDZ24_Z28
Default

Quote:
Originally Posted by Racr_X View Post
What year is yours? This fix is for 98-02 cars. After you pull the box from under the dash, the box literally just unsnaps and the board is just lying inside.
The car is a 00 Formula that I sold him. In all the 12 f-bodies i owned this is the only that had this problem and it happened after i sold the car
__________________
CJ/33/blk male
2005 Chevrolet Corvette M6(Black)
1998 Chevrolet Camaro Z28 M6(Arctic white)
2002 Chevrolet Tahoe 5.3L(Pewter)


PAST LSX-00(LPM)C5 FRC M6/99(Blk) C5 FRC M6/99(BLK)Z28 M6/99(NBM)SS M6/01(BLK)SS M6/99(NBM)B4C A4/98(BLK)TA A4/98(BGM)Z28 M6/00Formula(pwtr)M6/00 TA WS6(BLK)M6/00(BLK)Formula M6/00(MMM)Z28 M6/98Formula(BGM)M6/98 TA WS6(Blk)M6/99 +1
CJDZ24_Z28 is offline   Reply With Quote
Old 03-18-2008, 08:48 PM   #10
TECH Apprentice
Garage is empty, add now
 
Trader Rating: 0
Join Date: Feb 2005
Location: El Paso, TX
Posts: 345
Default

Great info, thanks!
angel71rs is offline   Reply With Quote
Old 03-18-2008, 08:52 PM   #11
LS1Tech Administrator
1998 Chevrolet Camaro
My Garage
 
RPM WS6's Avatar
 
Trader Rating: 3
Join Date: Nov 2001
Location: Lincolnwood, IL Member: #317
Posts: 20,027
Default

I've only known of one LS1 F-body to have this problem, and I've worked on/owned a TON of them.

Not really what I'd call a common issue at all, but this is great info nonetheless!
__________________
1998 Camaro Z28 | 1971 Nova SS-350



Previous LSx Vehicles:
2002 Camaro Z28 | 2000 Trans Am WS6 | 1999 Camaro Z28
RPM WS6 is offline   Reply With Quote
Old 03-19-2008, 02:42 AM   #12
Staging Lane
Garage is empty, add now
 
Trader Rating: 5
Join Date: Sep 2006
Location: Tulsa
Posts: 55
Default

Quote:
Originally Posted by RPM WS6 View Post
I've only known of one LS1 F-body to have this problem, and I've worked on/owned a TON of them.

Not really what I'd call a common issue at all, but this is great info nonetheless!
RacrX has owned/ worked on over a 100 LS1 F-Bodys. This is his experience. I dont think its unique to him. But Ya, its great Info!
RedFirehawk is offline   Reply With Quote
Old 03-19-2008, 06:28 AM   #13
TECH Enthusiast
Garage is empty, add now
 
crzytown69's Avatar
 
Trader Rating: 17
Join Date: Dec 2005
Location: charleston wv
Posts: 572
Default

my 99 fireturd did it and my 98 ls1 ta doses it form time to time imma try this ill keep you guys posted
__________________
-SOLD-
1998 Red Trans Am
3.73's, Forged 383, Dart Pro1 heads 225 runners 2.05/1.60,
Texas Giant Cam 248/254 613/622 114 LSA,
Pacesetter LT's & Off Road Y, FAST 90 intake, 90mm UMI TB
crzytown69 is offline   Reply With Quote
Old 03-24-2008, 05:07 PM   #14
TECH Enthusiast
Garage is empty, add now
 
KameleonTransAm's Avatar
 
Trader Rating: 1
Join Date: Jul 2006
Location: S. FL/ Gainesville
Posts: 601
Default



Do these connections have to be taken out before the circuit board can be reached?
__________________
KameleonTransAm is offline   Reply With Quote
Old 03-24-2008, 06:50 PM   #15
TECH Enthusiast
Garage is empty, add now
 
KameleonTransAm's Avatar
 
Trader Rating: 1
Join Date: Jul 2006
Location: S. FL/ Gainesville
Posts: 601
Default

Ok, you guys have worked on this, how do you get the circuit board out? Do you just yank it out even though the three plugs are still plugged in?
__________________
KameleonTransAm is offline   Reply With Quote
Old 03-24-2008, 11:55 PM   #16
Staging Lane
Garage is empty, add now
 
Trader Rating: 5
Join Date: Sep 2006
Location: Tulsa
Posts: 55
Default

Unplug it first, all 3 connectors.Once you have it out you of the car. There are to Tabs you unsnap and you fold back the on top and bottom, you will see its made to fold then you just pull it straight out. Very Simple.
RedFirehawk is offline   Reply With Quote
Old 03-25-2008, 01:48 AM   #17
TECH Addict
Garage is empty, add now
 
Grimes's Avatar
 
Trader Rating: 3
Join Date: Mar 2003
Location: Northern NJ
Posts: 2,639
Default

great detective work!
__________________
2002 Camaro Z28
Lid | Ported TB | ASP Pulley | Pro 5.0 | Hooker Catback| BMR SubFr |Tokico HP Shocks | Earl's SS Br Lines | Hawk HPS Pads | Strano 35/22 Sway Bars
Grimes is offline   Reply With Quote
Old 03-25-2008, 02:52 AM   #18
TECH Junkie
Garage is empty, add now
 
ae13291's Avatar
 
Trader Rating: 8
Join Date: Jun 2007
Location: san fernando valley, california
Posts: 3,059
Send a message via AIM to ae13291
Default

great info man! thanks my car has the same prob but doesent happen all the time! thanks
__________________
'99 Camaro Z28 M6 SOLD!
ae13291 is offline   Reply With Quote
Old 03-25-2008, 07:40 PM   #19
TECH Enthusiast
Garage is empty, add now
 
KameleonTransAm's Avatar
 
Trader Rating: 1
Join Date: Jul 2006
Location: S. FL/ Gainesville
Posts: 601
Default

Alright thanks a lot! I ended up just leaving all three plugged in and soldered it while it remained inside the little black box though. Unfortunately I pulled out of my garage and lost my radio again...I think its a wiring issue and I enjoyed all that circuit board fun for nothing .
__________________
KameleonTransAm is offline   Reply With Quote
Old 03-30-2008, 11:14 PM   #20
Staging Lane
Garage is empty, add now
 
Trader Rating: 1
Join Date: Nov 2004
Posts: 65
Default

Thanks for the write-up, My windows have not worked for a year now, i pulled out the bcm and sure enough there was a hair line crack on the solder, so i re-solder the spot and now my windows and radio work. thanks for the advice
RK2K2WS6 is offline   Reply With Quote
Old 03-30-2008, 11:14 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
How to fix your radio/door locks/windows etc from flickering. phantomzer0 Stereo & Electronics 29 08-07-2014 10:37 PM
Stereo/Windows Not Working Randomly While Driving? *FIXED* TheBlueKnight General Maintenance & Repairs 2 09-10-2013 08:41 AM
BCM Clicking / Ticking every 10 secs velle68 General Maintenance & Repairs 6 02-23-2013 11:55 PM
Temperature Gauge Mod instructions ACW General Maintenance & Repairs 26 09-30-2012 08:41 PM
Power locks not locking - the fix SparkyJJO General Maintenance & Repairs 0 12-19-2008 10:39 PM


Tags
1999, 2002, 2004, bcm, body, c5, camaro, connectors, control, corvette, electrical, find, info, location, module


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




All times are GMT -5. The time now is 11:14 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details