2007 Chevy Trailblazer interior electrical issue

Tiny
SOLDIERMEDIC79
  • MEMBER
  • 2007 CHEVROLET TRAILBLAZER
Electrical problem
2007 Chevy Trailblazer 6 cyl Two Wheel Drive Automatic

I was driving down a straight road at about 35 mph and hit the brakes going up to a red light and all my internal lights and gauges went out. Headlights and brakelights still worked, but all inside power went out. It happened 3 times today, all around 0400-0430. The next thing that happens is the flat tire signal comes on, then the check engine light, and then all other instruments come back. However, the stereo stays off until I stop and restart the truck. It's an after-market, so I have to reset all my settings, as if I just installed the radio. Prior to this, whenever I would hit a bump, the lights inside would flicker out for a split second, but this is getting worse over time.
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Wednesday, October 27th, 2010 AT 1:18 PM

9 Replies

Tiny
KHLOW2008
  • EXPERT
Hi soldiermedic79,

Thank you for the donation.

Symptom indicates a loose connection somewhere and it most likely is underhood.

You have to check the connectors between the battery to main fuse box and under dash.
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Thursday, October 28th, 2010 AT 9:44 AM
Tiny
SOLDIERMEDIC79
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Ok, checked the connections under the dash, but I am not sure I found and checked them all: I opened up the space under the steering wheel and did find one loose connection, and I hope that was it. Will update further after I get to work and back.
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Thursday, October 28th, 2010 AT 2:25 PM
Tiny
KHLOW2008
  • EXPERT
Thanks for the update and keeping my fingers crossed that the problem has been solved.
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Thursday, October 28th, 2010 AT 2:40 PM
Tiny
SOLDIERMEDIC79
  • MEMBER
Well, it happened again: but it was a few bumps in the road that did it. Happened twice. This time, I did something different, as soon as the lights went out, I clicked on the overhead light and all the lights came back instantly. I was able to do that test twice on the way home.
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Monday, November 1st, 2010 AT 11:39 PM
Tiny
KHLOW2008
  • EXPERT
This could be an indication a ground circuit is loose. Recheck the grounding points under dash on both sides at or near kick panel.
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Tuesday, November 2nd, 2010 AT 7:33 AM
Tiny
SOLDIERMEDIC79
  • MEMBER
Ok, I have time today to check those things out. I will take my time with these things, and I have a Haynes manual, but any other pointers that you could give would help. Also, I didn't mention that I have an aftermarket CD player installed. Could there be an issue there?
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Monday, November 8th, 2010 AT 3:30 PM
Tiny
KHLOW2008
  • EXPERT
The CD player should not be the problem but the installation could have interrupted the grounding circuits. If problem started after installation of the CD player, then that is the area I would start first.
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Monday, November 8th, 2010 AT 5:34 PM
Tiny
SOLDIERMEDIC79
  • MEMBER
Ok. Problem just got worse, but I think I found the issue, but I need a history of reports with it. My lights inside stay off longer, and now my taillights are going out as well. I didn't notice it until someone was trailing me home, so it might have also been going on w/o me knowing. The BCM (Body Control Module)which controls all these things may have a short somewhere. That's the most possible thing. Any thoughts?
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Friday, November 12th, 2010 AT 4:11 PM
Tiny
SOLDIERMEDIC79
  • MEMBER
HEY! Got something new. And promising. The interior and brake lights all go out, the rear wiper doesn't work when the lights go out. However, when I turn on my nighttime lights manually using the switch on the left side of the dash, I have no problems! None in 2 days. Does this isolate the problem possibly to the BCM?
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Sunday, November 14th, 2010 AT 6:48 AM

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