opinion-blackandwhite
Pontiac GTO Forum | GasTiresOil.com
More GTO info Billing Department News Department News Editor Obituaries Advertising Department Discussion Forum
Go Back   Pontiac GTO Forum | GasTiresOil.com > GTO Technical Forum > Sound Systems and Electronics

Sponsors
Affiliate Sites


Reply
 
Thread Tools Display Modes
Old 06-11-2012, 12:11 AM   #1
MannyLobo
HGH Optimist
 
MannyLobo's Avatar
 
Join Date: Jul 2009
Location: Houston, TX
Posts: 5,553
Send a message via AIM to MannyLobo Send a message via Yahoo to MannyLobo
Seriously... CHECK YOUR BCM HARNESS!!!

Here are a few people talking about something that you absolutely need to check:

http://www.ls1gto.com/forums/showthread.php?t=377773

(Note: This might or might not have been my problem below.*)

My car was going bonkers the past few days, out of nowhere. It started last Monday. I went to turn my car on, and everything turned off. Backed the key out, and tried again... same thing. So... I checked something out. I turned the key to see if the electronics would turn on: Nope. The CEL was just flickering like hell. After 2 or 3 tries, the time on the radio reset. So... I automatically thought it was a battery issue. I ended up getting my Dad's voltmeter, and the battery was reading 12.6 V. After a few tries, the car finally fired up. Went about my day, and it didn't do it for a few days.

Thursday morning, same thing. Crap... I thought I was gonna be late for work. It only took a couple of turns to get the car on this time. Worked good for a couple of days this time.

Yesterday (Saturday), I was gonna go visit my Mom in the hospital, and same thing... car wouldn't turn on. This time, it would NOT fire up. I turned the key to see about the electronics again, and it was that constant flickering again. I followed the sound of it, and it was coming from the fuse box under the hood. Once I took the key out, the sound went away. After I ran all my errands, I started looking throughout all of the GTO forums, and found the resolution above.

Today (Sunday), the first thing I tackled was the BCM Harness. Got under the glove box first, and could see a little wear in the cloth. Took off the glove box no problem, and didn't even break the clip. Put some electrical tape around the wires/cloth, and put a little tape across that metal edge. I need to find some foam tape, though. I don't trust the electrical tape on that edge.

Now... in addition to the BCM check above, I did a little "fix" on the positive connection on my battery. I can't find the thread again, but good ol' Kingsize mentioned something about that plastic on the bottom of the Positive post. According to him, that little piece sometimes messes with the positive connection, so he says to just remove it altogether. I did that, and voila! Selena fired up perfectly.

*So... I can't tell you if my problem was because of the BCM harness, or the positive connection, but this is something you should all check. If I can do it, then most of you should have no problem doing it. This is only a few hours after the fix, so I'm hoping it doesn't come back. I'll update if anything changes.

I have a video of what the problem looks like, but it's on my crummy cell phone. Not sure if I can email it to myself or not.
__________________
Selena: 2004 QSM/Black A4 - Bone Stock: 13.591 @ 102.10 (60': 2.030) - [Street Tires] - [3/26/10]
Show: Interior/Exterior LEDs, 35W 5000K HIDs, Clear Side Markers, '05/'06 Hood, '06 Tails, Cut '04 Bumper with PFYC Rear Inserts
Go: LPE Intake, Ported TB, Ported LS6 Intake, Custom '05/'06 Exhaust with Dynomax Bullets & Stolen Fox H-pipe
Whoa: Powder Coated '05/'06 Brakes, Russell Stainless Lines, Drilled/Slotted Rotors

Chelsea: 2005 GMC Yukon SLT - Deep Blue Metallic --- The New Daily

Last edited by MannyLobo; 06-11-2012 at 12:14 AM.
MannyLobo is offline   Reply With Quote
Old 06-14-2012, 08:40 PM   #2
Poolshark1321
Senior Member
 
Poolshark1321's Avatar
 
Join Date: Sep 2009
Location: League City, Tx
Posts: 2,217
Yep I had bookmarked that thread last year when I found it... very good information and its actually fairly common especially as these cars age more and more.

Glad you got it all fixed Manny!
__________________
Poolshark1321 is offline   Reply With Quote
Old 06-14-2012, 09:37 PM   #3
MannyLobo
HGH Optimist
 
MannyLobo's Avatar
 
Join Date: Jul 2009
Location: Houston, TX
Posts: 5,553
Send a message via AIM to MannyLobo Send a message via Yahoo to MannyLobo
Quote:
Originally Posted by Poolshark1321 View Post
Glad you got it all fixed Manny!
Heh. Yup. I was about one day away from giving you a call to come and replace my alternator.

Glad I stumbled upon that thread. I wish I could find that other thread; Same situation in the OP, same suggestions, but it had Kingsize mentioning something about that positive connection.

I can't email the video to myself, so I'm gonna try and hook a USB to my phone. Should come off that way.
__________________
Selena: 2004 QSM/Black A4 - Bone Stock: 13.591 @ 102.10 (60': 2.030) - [Street Tires] - [3/26/10]
Show: Interior/Exterior LEDs, 35W 5000K HIDs, Clear Side Markers, '05/'06 Hood, '06 Tails, Cut '04 Bumper with PFYC Rear Inserts
Go: LPE Intake, Ported TB, Ported LS6 Intake, Custom '05/'06 Exhaust with Dynomax Bullets & Stolen Fox H-pipe
Whoa: Powder Coated '05/'06 Brakes, Russell Stainless Lines, Drilled/Slotted Rotors

Chelsea: 2005 GMC Yukon SLT - Deep Blue Metallic --- The New Daily
MannyLobo is offline   Reply With Quote
Old 06-18-2012, 12:50 AM   #4
Thundergoat
Still Haulin A**
 
Thundergoat's Avatar
 
Join Date: Jul 2009
Location: Bergen/Passaic County, NJ
Posts: 50
I googled the thread from the other forum as my keyless entry stopped working. Wrapped the wire in electrical tape and ziptied the wiring to another harness so no wiring would come in contact with the dash brace. I think there is also another harness above the hood release lever. I pushed that up away from the brace as well. Also reinstalled the factory bulbs in the kick panels and the keyless entry has been working again ever since.
__________________


Hurst, Harrop, K&N, Maverick Man, Nitto NT555, SLP, 18" Stern ST-1, Smoked Sidemarkers.
Cam broke old motor...stock LS1 back in...for now.
Thundergoat is offline   Reply With Quote
Old 06-18-2012, 08:47 AM   #5
MannyLobo
HGH Optimist
 
MannyLobo's Avatar
 
Join Date: Jul 2009
Location: Houston, TX
Posts: 5,553
Send a message via AIM to MannyLobo Send a message via Yahoo to MannyLobo
Y'know... ever since I fixed that harness, it's like the little electrical "gremlins" are gone.

The lock/unlock buttons on my key pop the locks easy now. I used to have to try a couple of times. Also, it seems like the car fires up a whole lot better.

I read that people said their car's performance improved. I dunno about all that, but the car does seem to be in good shape.
__________________
Selena: 2004 QSM/Black A4 - Bone Stock: 13.591 @ 102.10 (60': 2.030) - [Street Tires] - [3/26/10]
Show: Interior/Exterior LEDs, 35W 5000K HIDs, Clear Side Markers, '05/'06 Hood, '06 Tails, Cut '04 Bumper with PFYC Rear Inserts
Go: LPE Intake, Ported TB, Ported LS6 Intake, Custom '05/'06 Exhaust with Dynomax Bullets & Stolen Fox H-pipe
Whoa: Powder Coated '05/'06 Brakes, Russell Stainless Lines, Drilled/Slotted Rotors

Chelsea: 2005 GMC Yukon SLT - Deep Blue Metallic --- The New Daily
MannyLobo is offline   Reply With Quote
Old 06-22-2012, 07:40 PM   #6
Poolshark1321
Senior Member
 
Poolshark1321's Avatar
 
Join Date: Sep 2009
Location: League City, Tx
Posts: 2,217
I really think this is one of the biggest things that causes electrical gremlins in these cars...

Stephen was mentioning to me a few weeks back (at a party for Drew) that his running lights wont work at all... going to mention this to him.
__________________
Poolshark1321 is offline   Reply With Quote
Old 09-27-2021, 05:07 AM   #7
rossjulie
Junior Member
 
Join Date: Sep 2021
Posts: 1
Aging cars can result to such.You should always check on them.
rossjulie is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 05:22 AM.

Billing Department News Department News Editor Obituaries Advertising Department Discussion Forum More GTO stuff

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Jett Fuel Productions, LLC - All Rights Reserved
GasTiresOil.com is not affiliated with General Motors Corp.