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Chevrolet TrailBlazer Electrical Problems

104 messages,  Last post on Nov 12, 2009 at 1:36 PM

You are in the Chevrolet TrailBlazer Forum. Your Hosts are steve_ & tidester

What is this discussion about? Chevrolet TrailBlazer, Chevrolet TrailBlazer EXT, Electrical, SUV


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#54 of 104
Re: Everything Electrical [mark1974] by tamesa
Oct 28, 2008 (9:39 am)
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Replying to: mark1974 (Oct 28, 2008 7:40 am)

After changing the alternator, computer, changing several modules and doing some wiring repair, my beloved Trailblazer continued to have it's "OH MY GAWD I AM A FREAK OF NATURE" fits in which the dash went haywire...lights on, gauges possessed, no ac, windows in front not working, passenger seat not working, no power locks working..I brought it back to the shop for the 6th time. That was the day that the mechanic found the issue. It was the connections to the computer being corroded. The top connection was fine, but the connection of the bottom of the computer had corroded and melted wires. In addition, the "o" ring around the bottom connection of the computer was starting to corrode leaving a gaping hole for water to get in and short everything.
 
There is light at the end of the tunnel.
#55 of 104
Re: 2006 Trailblazer ------a lemon? [malibukp] by gonzofulda
Dec 01, 2008 (11:55 am)
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Replying to: malibukp (Feb 20, 2008 10:09 am)

im having the same problem.should i call GM head quarters first? be 4 i take the car in. i hope to here from u soom.
                                     gonzo
#56 of 104
Re: 2006 Trailblazer ------a lemon? [gonzofulda] by tamesa
Dec 01, 2008 (12:59 pm)
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Replying to: gonzofulda (Dec 01, 2008 11:55 am)

Hi,
 
For me it turned out to be a corrosion issue with the connection from the wiring harness to the computer. The connector to the computer was not only corroded but melted as well. my mechanic says that it is poor design with having the computer so low to the ground and so close to the engine. Good luck.
#57 of 104
Chime Indicators and Driver Side Speaker by trailblazer1
Dec 02, 2008 (12:43 pm)
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2002 Trailblazer LT
For the longest time the drivers side door speaker audio was not working and I had assumed that it had gone out. Then by coincidence I happed to notice the following set of unusual electrical quirks as it peratined to the speaker and the apparent intermittent problem of coming on at extremely low volume.
 
The first procedure was to check L-R audio balance. When adjusting all the way over to L, I found that the L side speaker audio level was working but the volume was low to just barely non-existant. - R side was fine.
 
This is where all the unusual electrical quirks come into play if and when the speaker works at it's proper volume. It just so happened that I was having 3 separate issues occur when the L side speaker volume would be non-existant or just barely noticeable.
 
The:
Daytime Running Lamp chime for on/off operation would not work all the time.
Chime for leaving the Turn Signal on to long would not work all the time.
Low Fuel Indicator Chime would not work all the time. (low fuel light works fine)
 
The strange thing is that when all the above do work, the speaker comes on and works just fine. The only distinct correlation I've found when everything is working properly is that on summer days when the outside tempurature is 90 degrees or above or the car sets long enough in the heat everything works as it should. During cooler days sometimes it worked sometimes not. Just so very intermittent.
 
Have not taken it to a dealer as of yet because I fear it will be a control module or
sensor of some sort and the cost for the fix will be outrageous.
 
Any thoughts would be helpful.
#58 of 104
Re: Chevrolet Trailblazer Battery Replacement [cernst2] by leblanc5
Jan 02, 2009 (12:23 pm)
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Replying to: cernst2 (Nov 14, 2007 11:34 am)

how did you resolve the problem. I'm having the same problem
#59 of 104
Re: Power Problems [bigmarv] by leblanc5
Jan 02, 2009 (12:25 pm)
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Replying to: bigmarv (Jan 25, 2008 6:46 pm)

i have the same problem after changing a battery. how did you fix it
#60 of 104
Re: 2006 Trailblazer ------a lemon? [gonzofulda] by malibukp
Jan 03, 2009 (12:07 am)
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Replying to: gonzofulda (Dec 01, 2008 11:55 am)

Sorry for the late reply, I haven't been on this board in a while. I never got my problem fixed, kept having strange things happen. Then, the last time I had it serviced, they had replaced my battery in my key remote. Everyhing was okay for a few days, then that battery went out again (the one in the key remote, for the automatic doors, etc- and it was less than a week old). I just didn't bother to replace that as I figured who cares- and I have not had a problem since. Someone in this thread mentioned that that was my problem, and I think he/she was right. It is slightly annoying to not have that auto lock, but it is a small price to pay for comfort of having a car that starts.
#61 of 104
Re: Draining battery down [baddbone] by malibukp
Jan 03, 2009 (12:20 am)
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Replying to: baddbone (Jun 20, 2008 1:00 pm)

Thanks, I think you are right. After they replaced my battery in my key remote, that same battery died like 3 days later. I didn't bother to fix it because it was the least of my problems at the time. Since then, my car has only died once. I think that maybe there is a short or bad connection in the remote that was signalling something to my car that was off/wrong??
  Also, seem to have the problems when it is really cold/wet. Now that we are getting into winter, we will see what happens. I will keep in mind some of the other responses regarding the connectors to the computers being corroded, etc.
#62 of 104
Re: Power Problems [leblanc5] by tamesa
Jan 03, 2009 (9:32 am)
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Replying to: leblanc5 (Jan 02, 2009 12:25 pm)

I had my mechanic tear apart the connections from the computer and repair them.
#63 of 104
Re: 01 Trailblazer Electrical/Turn Signal Problems [graymc21] by jrcrane
Jan 31, 2009 (11:59 am)
Reply

Replying to: graymc21 (Aug 27, 2008 8:47 am)

I am having this same problem. What took care of the problem?

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