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Chevy TrailBlazer Headlight Questions

171 messages,  Last post on Oct 13, 2012 at 9:15 PM

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What is this discussion about? Chevrolet TrailBlazer, SUV

Messages Page 11 of 18

#100 of 171 Re: 2003 Chevy Trailblazer Headlights Out [pdesimone] by cwb7266

Oct 14, 2009 (3:21 pm)

Replying to: pdesimone (Jul 02, 2007 7:58 am)
Doing research and saw this post. I have the same issue with low beam lights going off and on....However, I have a 2007 TB - was just told by GM dealer that the "entire block" has to be replaced (part $207 and labor $160). I do not have a clue what they are talking about, except its under the seat. Does my car not have the "relays #45 and #46"? Sorry I am ignorant when it comes to cars and I am tired of getting screwed.

#101 of 171 Re: 2005 Trailblazer Headlight Problems [mcarlin] by keithb5

Oct 29, 2009 (5:12 pm)

Replying to: mcarlin (May 21, 2008 12:30 pm)
I have the same problem with my 05 Trailblazer. The lights dim because the alternator normally produces 14.5 volts. The battery output is about 12 volts. The voltage drops momentarily when the alternator fails to produce 14.5 volts. I have also noticed the problem during a hard acceleration, which caused me to think it was a slipping serpentine belt. However, the random dimming occurs while driving at a steady speed. Dealer replaced the under-hood fuse block (not the one under the rear seat) as well as the alternator. Neither action fixed the problem. I wonder if it is possible to connect the diagnostic computer and let us drive the cars for a few days with the computer connected.

#102 of 171 Re: Trailblazer head lights going out! [dont437] by fj4072

Nov 01, 2009 (11:56 am)

Replying to: dont437 (Jun 09, 2009 1:08 am)
Your problem is your relay. #46 under the hood. If this happens again, try switching #46 with #45, same relay only for the fan clutch. If they go back on, this is your problem. Autozone has them for $40

#104 of 171 No 4WD - Transfer Case Controls Don't Light Up by pdesimone

Dec 21, 2009 (9:27 pm)

I have a 2003 Trailblazer with130,000 miles. Snowed the other day and when I turned my Transfer Case Controls, nothing happened. No yellow light came on and no 4WD.
Any ideas on what to check for. I looked in the owner's manual and saw that Fuse Number 8 says "Automatic Transfer Case" so first thing tomorrow I'll check that. That would be too easy but I'm hoping it's blown. Any other suggestions would be greatly appreciated.

#105 of 171 Re: Trailblazer head lights going out! by allen777

Dec 23, 2009 (8:06 pm)

This is a continuing dangerous problem. The night before the the night before Xmas, my wife was doing some last minute shopping before a 280 mile drive
the next day. Wife called - no lights. She drove home with the brights while I found all this information about fuse #46 and #45, thanks to this site I switched the fuses, even though the fuse in #46 (headlamp) was then working. At least I know what to do if it happens during our trip. Merry Christmas GM, you may be bankrupt but you won't steal Christmas from us.

#106 of 171 03 headlights by goosehunter

Jan 06, 2010 (4:59 pm)

I have replaced my headlights on my 03 trailblazer at least 4 times this past year and dont know why they keep going out. a couple years ago one of the sockets melted and i replaced it and it seemed to work fine for a while bu the dam things keep going out now. Any ideas anyone would be great.

#107 of 171 Re: 03 headlights [goosehunter] by fj4072

Jan 06, 2010 (5:35 pm)

Replying to: goosehunter (Jan 06, 2010 4:59 pm)
First things first. Make sure there aren't any finger prints on the bulbs, the grease will cause a hot spot and cause it to blow quicker. If you do touch these bulbs, wipe down with alcohol. 2. Use die-electric grease on the socket next time, will prolong the life of the bulb and dissapate any excessive heat generated. Check for loose, or dirty connections at the battery and alternator, could have an electrical surge which will cause these to pop quicker also, cleaning these up will help. 3. Make sure you have the right wattage, I believe that OEM is 51w, but any more than 55w will blow quicker also. These are the basics, next would be replacing the wiring harness that goes to the lights.

#108 of 171 Re: 2002 Trailblazer [mrfixit4] by goosehunter

Jan 07, 2010 (10:26 am)

Replying to: mrfixit4 (Apr 27, 2009 7:35 pm)
question for u did u ever get the headlight problem fixed and if so what did you do. i have a 03 trailblazer and i replaced the melted socket on the drivers side and the dam thing kepps blowing again any ideas on what to do. please help this is really pissing me off

#109 of 171 Re: 2002 Trailblazer [goosehunter] by hawkeye2376

Jan 07, 2010 (11:35 am)

Replying to: goosehunter (Jan 07, 2010 10:26 am)
I did get mine fixed after going through a few bulbs and 1 socket. I eventually got 2 new sockets capable of higher temps (I think they're ceramic) from the local parts store. I guess the original stock sockets (and their original replacements) are only capable of handling the heat from the original bulbs, or their equivalent. All bulbs I tried (3 different brands) blew and/or melted the sockets until I replaced them. Since installing the high-temp sockets, I haven't had any problems.

Messages Page 11 of 18

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