CLBs destroy BCMs!
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,435
Likes: 365
From: Maryville TN
St. Jude Donor '06-13,'16-'17, '19
CLBs destroy BCMs!
Ok, I keep hearing about how the CLBs (column lock bypass modules) are somehow overloading the BCMs (body control modules) and destroying them. I'd like to hear some real world facts about this.
Urban legend? I think so. Being in an electrical eng profession, I'd like to argue just HOW a low current circuit can burn the contacts of a relay. :smash:
Tom
Urban legend? I think so. Being in an electrical eng profession, I'd like to argue just HOW a low current circuit can burn the contacts of a relay. :smash:
Tom
Team Owner
Joined: Dec 2000
Posts: 58,783
Likes: 1
From: D*ck ina Box
CI III & IV Vote Ho
CI II, III, IV & V Vet
CI IV Bracket Champ
St. Jude Donor '03-'04
Re: CLBs destroy BCMs! (TCW)
Ok, I keep hearing about how the CLBs (column lock bypass modules) are somehow overloading the BCMs (body control modules) and destroying them.
Le Mans Master
Joined: Aug 2001
Posts: 6,213
Likes: 1
From: South Alabama
Re: CLBs destroy BCMs! (TCW)
So what are you saying?? :confused:
I'm not an electrical engineer type but I know my C5 Solutions bypass hasn't caused problems. Should I be thinking "yet?" :confused:
I'm not an electrical engineer type but I know my C5 Solutions bypass hasn't caused problems. Should I be thinking "yet?" :confused:
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 905
From: Lake Elsinore, CA
Re: CLBs destroy BCMs! (Mean Green 2000)
source(s).... :confused:
Hey, don't kill the messenger. I have the CLB from C5 solutions and it ain't comin' out.
Team Owner
Joined: Dec 2000
Posts: 58,783
Likes: 1
From: D*ck ina Box
CI III & IV Vote Ho
CI II, III, IV & V Vet
CI IV Bracket Champ
St. Jude Donor '03-'04
Re: CLBs destroy BCMs! (Patches)
Hey, don't kill the messenger. I have the CLB from C5 solutions and it ain't comin' out.
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Melting Slicks
Joined: Feb 2002
Posts: 2,450
Likes: 0
From: Kansas City Missouri
Re: CLBs destroy BCMs! (Cajun75)
So what are you saying?? :confused:
I'm not an electrical engineer type but I know my C5 Solutions bypass hasn't caused problems. Should I be thinking "yet?" :confused:
I'm not an electrical engineer type but I know my C5 Solutions bypass hasn't caused problems. Should I be thinking "yet?" :confused:
Burning Brakes
Joined: Nov 2000
Posts: 832
Likes: 0
From: Joplin Mo
Re: CLBs destroy BCMs! (Patches)
[lower current signal from the CLB could cause the contacts in the BCM to deteriorate. Apparently, the circuit is designed to keep the contacts clean via a certain amperage from the column lock.]
ABSOLUTE
:bs :bs :bs
In 15 years of electronic design and repair, I've never heard of such a thing.
ABSOLUTE
:bs :bs :bs
In 15 years of electronic design and repair, I've never heard of such a thing.
Pro
Joined: Sep 2000
Posts: 505
Likes: 0
Re: CLBs destroy BCMs! (TCW)
The bulletin from Chevrolet concerning this issue stated that the low current from the CLB to the BCM could cause the contacts in the BCM to become oxidized over time. The thrust of the issue being that if oxidized contacts in a failed BCM were determined to be caused by an aftermarket CLB, the replacement of the BCM would not be covered by the factory warranty. I've got a copy of that bulletin around here someplace. Soon as I find it I'll post the specifics.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,435
Likes: 365
From: Maryville TN
St. Jude Donor '06-13,'16-'17, '19
Re: CLBs destroy BCMs! (Patches)
source(s).... :confused:
Few weeks ago, one of the C5 techs posted that the lower current signal from the CLB could cause the contacts in the BCM to deteriorate. Apparently, the circuit is designed to keep the contacts clean via a certain amperage from the column lock.
Few weeks ago, one of the C5 techs posted that the lower current signal from the CLB could cause the contacts in the BCM to deteriorate. Apparently, the circuit is designed to keep the contacts clean via a certain amperage from the column lock.
In my experience, HIGH current loads can cause contacts to deveelop a gassy film over a period of time causing the circuit to develop an even higher load. I talking very very high current loads here though. I'm totally open about this. I don't mean to, nor claim to be a "know it all". Teach me! I'm willing to learn.
For the record, I too have used the CLB in 2 different C5s without any known problems. Both my CLBs were made by C5Solutions.
Tom
Melting Slicks
Joined: Mar 1999
Posts: 3,326
Likes: 0
From: Taylor TX
NCM Sinkhole Donor
Re: CLBs destroy BCMs! (TCW)
here's an older thread on the issue:
http://forums.corvetteforum.com/zerothread?id=351079
Be sure to read the response at the bottom from COH.
http://forums.corvetteforum.com/zerothread?id=351079
Be sure to read the response at the bottom from COH.
Thread Starter
Le Mans Master
Joined: Jan 2001
Posts: 6,435
Likes: 365
From: Maryville TN
St. Jude Donor '06-13,'16-'17, '19
Re: CLBs destroy BCMs! (lotzahp)
here's an older thread on the issue:
http://forums.corvetteforum.com/zerothread?id=351079
Be sure to read the response at the bottom from COH.
http://forums.corvetteforum.com/zerothread?id=351079
Be sure to read the response at the bottom from COH.
Back to our regularly scheduled program. :cheers:
Tom
[Modified by TCW, 11:26 AM 9/14/2002]
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 905
From: Lake Elsinore, CA
Re: CLBs destroy BCMs! (TCW)
:cheers: :)
I'd like to thank everyone that piped in on this debate as well. We need to air these issues out so that everyone is aware of all the information available and can make the most informed decisions. It's often tough to sort through it and pick out the gems but they seem to eventually surface when we work it hard. :yesnod:
I'd like to thank everyone that piped in on this debate as well. We need to air these issues out so that everyone is aware of all the information available and can make the most informed decisions. It's often tough to sort through it and pick out the gems but they seem to eventually surface when we work it hard. :yesnod:
Le Mans Master
Joined: Mar 2002
Posts: 7,179
Likes: 1
From: Honolulu Hawaii
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15
Re: CLBs destroy BCMs! (Patches)
When my new 2002 Roadster with less than 7K miles experienced the "Service Column Lock" nightmare while running (of course on a Friday night, three counties from home), the Chevy Service Manager responded by telling me the problem was fixed in 1999 and they haven't had a problem since....
This was as his Service Tech was pushing my 2002 car into the service bay for the Column Lock repair.... :crazy: :crazy:
[Modified by OCMike, 8:57 AM 9/14/2002]
This was as his Service Tech was pushing my 2002 car into the service bay for the Column Lock repair.... :crazy: :crazy:
[Modified by OCMike, 8:57 AM 9/14/2002]
