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Chevrolet TrailBlazer Electrical Problems

284 messages,  Last post on Apr 08, 2013 at 9:06 AM

You are in the Chevrolet TrailBlazer Forum.

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

    
 
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Messages Page 8 of 29

#66 of 284 Passenger side power by poppy12

Feb 09, 2009 (5:27 pm)

Ok, i need HELP! The passenger side of my 2002 Chevy Trailblazer does not work! The power window, door locks and interior light does not work, but only on the passenger side. Also the "service engine light" has recently came on and stays on constantly. I thought maybe I had a blown fuse so I stopped by one of the many auto parts store here in Tupelo and was going to have a diagnostics ran on it by hooking it up to the computer under the dash drivers side. However, the diagnostic machine would not read anything! The tech at the parts store told me I had a blown fuse, thats why my passenger side dosen't work and that same fuse powers the computer. Is that true? Whats the deal? Can u please help me?

#67 of 284 Re: Passenger side power [poppy12] by ticadoo

Feb 10, 2009 (6:34 am)

Replying to: poppy12 (Feb 09, 2009 5:27 pm)
All I can say is good luck. I've had my 03 Trailblazer at so many shops I have lost count. Nobody can fix the electrical problems; nobody can tell me why the "service engine" light is on.

#68 of 284 Re: Passenger side power [poppy12] by burdawg

Feb 11, 2009 (7:43 am)

Replying to: poppy12 (Feb 09, 2009 5:27 pm)
No it's not true. For the problem you describe I would look for a loose or faulty connector in the wiring harness that connects the passenger side systems to the main harness.
For the check engine light, the first place to look is always at the fuel cap. Is it on straight? Is it snugged down? Does the rubber seal in the cap have cracks in it like ours did? I wiped a little thick grease on the rubber seal on the cap and put it back on and the check engine light went away in a couple of days. Replaced the cap and no more problems.

#69 of 284 Re: Headlights and Dash lights [blondiebaby23] by gianni2

Feb 13, 2009 (9:47 am)

Replying to: blondiebaby23 (Feb 01, 2008 8:00 pm)
I am experiencing same problem. My headlights are flickering,dash lights will dim down at same time,also note the gauge to drop below 14 for several seconds. I have replaced the battery and alternator. Any suggestions?

#70 of 284 2005 trailblazer,headlights flicker,dash lights dim by gianni2

Feb 13, 2009 (10:21 am)

I have been noticing my headlights flickering & at the same time dash lights will dim,also notice the gauge will drop will 14 for the duration. This will usually last several seconds. Sometimes it will only occur once or twice and other times it will persist for the entire ride. I tried going to dealer for computer diagnostic,nothing showed up. I have replaced battery & alternator. Any other suggestions?

#71 of 284 Re: Headlights and Dash lights [gianni2] by rpowers

Feb 16, 2009 (7:17 pm)

Replying to: gianni2 (Feb 13, 2009 9:47 am)
I have the same symptoms on my "05" - it just started this week and I have no idea what it could be? All of us that have these light problems should bring this to the department of transportation - consumers groups - and GM = this is very unsafe and should not be affected by an out-of-warranty situation --- this is UNSAFE and should be a recall to repar no matter what mileage!!

#72 of 284 Re: Headlights and Dash lights [rpowers] by sharv10

Feb 17, 2009 (8:21 am)

Replying to: rpowers (Feb 16, 2009 7:17 pm)
I have the same problem with my 05 Trailblazer. It only happens in cool damp temps and I have found that as long as I let the truck warm up for a few minutes it does not do it while driving. I had it to the dealership a couple times but they had no answers as it would not do it for them. I had it to my local mechanic and he thinks it is an issue with the voltage regulator sticking. I agree that is should be a warranty issue.
 
I also have trouble with my speedometer not working after a few minutes of driving. Have not gotten too many answers on that one either.
 

#73 of 284 bigfig by bigfig

Feb 26, 2009 (8:26 pm)

I added windshield fluid and when using the rear wiper there is no fluid coming on the rear glass but inside. How do you remove the rear panel to unclog the hose since fluid is coming out but not on the glass and the wiper is working?

#74 of 284 Battery goes to 7.0 volts in overnight cold by nutrinoman

Mar 04, 2009 (2:02 pm)

When the outside temp goes below 5-10 degrees the battery voltage drops to 6.8-7.2 volts which means absolutely nothing works on the vehicle. 45 days ago I replaced a 2 year old Sears Die Hard Gold series battery (an 8 year battery) with a new one. The problem went away for 45 or so days. Last night the temp went to -2 degrees. This morning, the battery read 7.1 volts. I jumped started it, letting it run for 30 minutes. Now it starts fine. I checked with the Chevy dealer I bought it from and they say it is up to date on all recall notices. They also say they have never heard of this problem. After searching the web I find that hard to believe. Previous posters mentioned corroded computer connections. Where is this computer located?
 
In addition to the battery issue, I have another with the front passenger door electrical system. Sometimes all the electrical stuff works fine and other times nothing works, mirror adjustment, switch lights, window, and lock. If any work then they all work. I can drive during the night and watch the lights on the switches turn on and off. It looks like a connector problem but I can't find one that seems to cause the problem.
 
Any ideas for either of the problems would be greatly appreciated.

#75 of 284 Re: Battery goes to 7.0 volts in overnight cold [nutrinoman] by burdawg

Mar 05, 2009 (1:24 pm)

Replying to: nutrinoman (Mar 04, 2009 2:02 pm)
During the 45 days the problem went away, did the temperature drop below the 5-10 degree point at any time?
I think I would do this, but it depends on your personal level of ability:
The next time low temps are expected overnight, disconnect the battery. If the battery charge stays up then you have a pretty good idea that the battery is OK. If that's the case then I would suspect some system in the vehicle is turning on when the temperature drops down, or some component is being effected by the cold causing a load on the battery. Under these conditions you could verify it by measuring the resistance across the battery cables. It should be quite high. That's going to be very hard to diagnose, since it only occurs during cold weather.
If after the battery colds soaks overnight the charge is low (assuming the charge was good before the cold soak), then the battery is likely weak. You need to keep something in mind, just because a battery is new or has a good warranty, that doesn't mean the battery won't fail. Batteries today are shipped wet, which means that they start aging the day they are filled with electrolyte. If they sit around on a shelf for a long while, they may be already old when you get them.

Messages Page 8 of 29

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