Last post on Oct 13, 2012 at 9:15 PM
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Chevrolet TrailBlazer, SUV
#98 of 171 Re: 2003 Chevy Trailblazer Headlights Out [frananneb]
Aug 28, 2009 (10:24 am)
I just had the same thing happen to me. I own a 2003 Chevy Trailblazer and my low beam head lights went out. I swapped the #45 & #46 Relays. It worked fine this morning, but when I went out for lunch my running lights don't come on any more. For the moment I can turn on my low beams but the running lights don't come on. Can anyone help. What is a permenant fix for the low beam lights going completly out? I call the Chevy Dealer yesterday and they want $98 bucks just to tell me what is wrong with it. I don't think so.
#99 of 171 Re: 2003 Chevy Trailblazer Headlights Out [frananneb]
Sep 15, 2009 (7:21 pm)
2004 Trailblazer low beams not working (kept going out but would come back on) changed the #45 and #46 relays and lights started working. Will be picking up new relay tommorrow. Thanks!
#100 of 171 Re: 2003 Chevy Trailblazer Headlights Out [pdesimone]
Oct 14, 2009 (3:21 pm)
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]
Oct 29, 2009 (5:12 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]
Nov 01, 2009 (11:56 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
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!
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.
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]
Jan 06, 2010 (5:35 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.