Head light Problem with my 2004 Chevrolet Trailblazer Truck.
4.2 inline six
Repairs for this problem = Replaced both headlight bulbs and checked fuses.
GM tech = jk
question = The low beam headlights on my 2004 Chevy Trailblazer dont work. They
both went out at the same time. I replaced both bulbs even though I would not think
they could go out at the same time. Fuses are all good. What can I do to repair this
problem.
JK:
As long as all the fuses are good, and the high beams work correctly, then a common
problem is a faulty headlamp relay. This relay is in the under hood fuse block. A lot of
the time it is overlooked because it is labeled "HDM". See picture below.
This applies to 2003, 2005 and 2006 Trailblazers also.
Most people dont realize this is for the headlamps. An easy way to check that is to swap
it with the same type relay that is right next to it. Turn the key off, swap relays, turn key
on, then turn head light switch on. It they come on, replace the bad relay. It costs
approx. $35.
4.2 inline six
Repairs for this problem = Replaced both headlight bulbs and checked fuses.
GM tech = jk
question = The low beam headlights on my 2004 Chevy Trailblazer dont work. They
both went out at the same time. I replaced both bulbs even though I would not think
they could go out at the same time. Fuses are all good. What can I do to repair this
problem.
JK:
As long as all the fuses are good, and the high beams work correctly, then a common
problem is a faulty headlamp relay. This relay is in the under hood fuse block. A lot of
the time it is overlooked because it is labeled "HDM". See picture below.
This applies to 2003, 2005 and 2006 Trailblazers also.
Most people dont realize this is for the headlamps. An easy way to check that is to swap
it with the same type relay that is right next to it. Turn the key off, swap relays, turn key
on, then turn head light switch on. It they come on, replace the bad relay. It costs
approx. $35.
Comments
| 9-15-10 I just wanted to say thanks!!!! I usually work on transmission but this lady wanted me to look at her headlights. I'm so glad you gave this tip!!!!!! |
| Glad we could be of help for your Chevy Trailblazer headlight problem. Come visit again ! |
| 9-22-10 Wow!! Mine went out in my '07 tonight on the way home. No street lights where we live either. It didn't make sense that they both went out at the same time, but changed the fuses anyway. Of course that didn't work. So, I jumped online and found this information almost right away. I have an '07. Funny, I could have been the lady the first guy was helping. But ended up helping myself. My husband is shocked too, but won't say. Thanks again!!!!! |
| 10-1-10 I've got the same problem with an 06. I checked the fuses and the relay. All were good. Still don't have any low beams. I was told by an old shade tree that it was the dimmer switch in the steering column. Could it be? Would hate to get into that and not be the fix needed. |
| 10-2-10 SPEEDOMETER GETS STUCK WHAT CAN I DO TO FIX THIS PROBLEM. |
| As long as you swapped relay with a known good one, could be the headlight switch, not the dimmer. |
| 10-5-10 .Same problem on my 04 no low beams. Checked fuses. Switched relays like shown in picture and the lights worked. Swapped relays back in original position and the lights are still worked. |
| 10-7-10 Awesome! Worked for our 2004 trailblazer. Thanks for great advice! |
| 10-8-10 You can disregard the previous message about having no lights after installing the new relay. Major stupidity on my part. I had lights this morning because it was still dark enough for the auto headlights to come on. At 11:00am, of course they didn't come on. Decided to pull into the garage this afternoon and the lights worked perfectly. Also was concerned because the running lights failed to come on. Didn't realize that the Trailblazer had to be in gear before they came on. Off when in park. Thanks a bunch for the tip on testing the relay. After several missteps, all came out well in the end. |
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| 10-9-10 What a great tip on 2004 trailblazer. Swapped out works great. |
| 10-12-10 Low beams 04 Trail Blazer not working will let u know if it works. |
| 10-23-10 Swap works for 04 V6 as well. Thanks for the assist on this. |
| 10-23-10 Right on the money! Exactly like you said! Thanks!!! |
| 10-23-10 I saw this suggestion last year on another site and did the same thing. The headlight problem went away. And just tonight they started doing it again. What are the chances of 2 relays going bad in the life of the vehicle. |
| 10-24-10 I am so great full for this website THANKS . |
| 10-29-10 One headlight would work one time then it would not the other. I found out when I move the main fuse box, the light would come on. I tighten the bolts inside the box, problem solved. |
| 11-10-10 Thank You Very Much!!!!. I had a feeling it might be a Relay. But did not know which relay to look at.. Thanks Again. Paul |
| 11-11-10 OMG!!!!!!! Thank you so much, I was so scared it would be a major electrical problem.... |
| 11-13-10 Thank you very much!! Great site!!! This relay was hard to find, no dealers had it. Glad you folks help me know what to look for! Thanks again!!! |
| 11-16-10 Thank you so much I was about to take the car to the dealer and was afraid of the bill, thinking it may be a electrical problem. I had changed the bulb and looked at the fuses and the relay. Never knew about this relay. (problem solved)-2006 Trail blazer! |
| 11-17-10 exactly what was wrong with mine too. Thanks! |
| 11-18-10 Thank you very much! Another Chevy Trail Blazer that did not go to the garage!! Fixed the problem after seeing your post! |
| 11-19-10 Thank you this is all very helpful information to Trailblazer owners just wish GM would take care of this through a recall! |
| 11-20-10 2004 trailblazer headlights. Thanks a lot, it really helps me, and avoid to pay someone to check my headlight. Thank you. |
| 11-25-10 BINGO! I was frustrated when the fuse didn't have power.......this helped allot! THANKS. |
| 11-26-10 I had a very similar problem. My problem differs though because for a week my low beams went on and off randomly at night. Finally yesterday they stopped coming back on. I checked the relay, switching the high and low relay fuse. The low beams still did not work. What else do you suggest? |
| 11-27-10 Anyone else having problems with a rattling muffler on their Trailblazer? Mine is a 2004, and muffler is driving me crazy. |
| 11-28-10 .Yea. Replace the muffler. |
| Check connections to terminals in fuse box for that relay. Possible headlight switch also. |
| 12-14-10 Hallelujah, it worked!!! Thanks for the tip! |
| 12-19-10 Local service center in Puerto Rico - Alberic Auto - quoted $600.00 new fuse box + labor $250. I was getting mugged. It is only a $30 relay. Jose. Thanks for saving me $820.00 !!!!!! |
| 12-29-10 I looked up "both headlights went out on a chevy blazer 2006" your website came up. I read it to my husband, five minutes later he said, that was the exact problem. Thank you very much. |
| 12-29-10 Yea my mom has a 2004 Chevy Trailblazer and it is doing the same thing as the person in the 11/26/10 posting. I took a look at the vehicle today but when I turned the ignition to the on position, I noticed that the daytime low beams came on. I took it to a local shop and he said that the lights are working and to pick up the vehicle. Do you know if this relay covers both daytime and nighttime low beams. |
| 1-1-11 Yea my mom has a 2004 Chevy Trailblazer and it is doing the same thing as the person in the 11/26/10 posting. I took a look at the vehicle today but when I turned the ignition to the on position, I noticed that the daytime low beams came on. I took it to a local shop and he said that the lights are working and to pick up the vehicle. Do you know if this relay covers both daytime and nighttime low beams. |
| Yes, the relay you mention is on the same circuit as the regular low beam headlamps that come on at night. It is at a reduced level for daytime running lights which is controlled by the headlamp driver module and body control module. Unless you have a problem like a specific lamp not working, or the daytime running lights not working, the system should be working normally if that relay is good, and all of your bulbs are functional. |
| 1-4-11 I have read over all of the suggestions here and have tried most. I still have no low beams. I got pulled over the other night and I am afraid that the next time I won't be let off with a warning. If anyone has other suggestions please email me at... I called my local gm dealership and they wanted to charge me $200 just to look at it. |
| 1-9-11 Thanks Relay fixed the problem cost $40.00 saved hundreds not going to a shop. |
| 1-13-11 The low beam headlights on my 2004 Chevy Trailblazer dont work. The both went out at the same time. I replaced both bulbs even though I would not think they could go out at the same time. Fuses are all good. What can I do to repair this problem.I replaced the relay three time now each time the relay last about two to three months |
| 1-13-11 I posted on 1-4-11 didn't know I couldn't put my email! I am going to try and replace the relay and see if that works. My dad looked at it and said that it looked fine but will try this. Thanks |
| 1-15-11 We just recently had the same problem & after replacing bulbs & switches, found the answer online! Even the dealer couldn't help. Tried switching fuses & problem solved! Thank you!!!! |
| Burning that relay means there is either a shorted wires in that circuit, high resistance in the ground circuit or a burned / corroded connector. Make sure the bulb connectors are not burned, then move wires around looking for a short. |
| 1-23-11 The driver's side low-beam headlight on my 2006 Trailblazer does not work. I replaced the bulb and check fuses and relay per info that you provided. Still doesn't work. Passenger's side low beam and both high beams work. Help! |
| If you are sure the fuses and relays are good, then you need to check for power into the bulb socket yellow wire. The black wire is ground |
| 2-2-11 Thank you, Thank you. You saved me $200. |
| 2-3-11 I have a 2002 and I tried this...didn't work! Also checked bulbs and fuses. Got anything else that will help? |
| 2-16-11 Thank you!!! From Dallas, Texas |
| 2-17-11 Replaced the relay this morning.................................. I have lights!!!!! Thanks! |
| 3-10-11 Thank you so much just showed a bunch of men how to fix a car they had been working on all day!!!! It is good to be a woman. |
| 3-22-11 THANK YOU so much!! I've been having the same problem for awhile and it took me awhile to convince my hubby I wasn't delusional cause when he would start it...he would have lights until FINALLY....they stopped. Replaced the switch, took it to a garage and no one could help, happened upon this sight, told him, he went out and BINGO...i too have lights....a good day. TY you ROCK! |
| 3-23-11 Have the same problem with my light . I thought I could find the problem But NO . First time I have ever looked on line for help . Thanks to you there fixed!!!!! Thanks ,A lot |
| 3-29-11 Thank you fix it in 20 minutes |
| 4-7-11 I had exact same problem and it's solved~! Thanks. My 2003 Trailblazer doesn't lid middle tail lights after this incident. What else do I need to look at?Thanks in advance. |
| 4-10-11 ok so it def. was the relay. I had three so called mechanics look at it and could not figure it out. |
| 4-11-11 My Daughter has a 2002 Dodge Stratus and both her low beams went out at the same time. I read your fix for the same issue someone was having with their Chevy Truck, does the same apply for this make/model? If so, is the headlamp relay easily accessible? |
| 4-17-11 thank you so much, i have an 04 trailblazer, and man i changed everything, i did what you said to do, and my lights worked!!!!!!!!! Thanks again, god bless |
| 4-17-11 My husband was going nuts trying to figure out the low beam issue. New bulbs, new fuse, new pigtails, new headlight switch and still nothing! I typed the question in and found your site. BINGO!! It was the headlight relay. Getting a new one tomorrow (local auto parts store said it is a "dealer item"). Thanks so much!! |
| 4-30-11 Amazing!! Replaced fuses&bulbs on my 2002 trailblazer,still no head lamps!(needs a recall by the way!)-auto parts store was no help-u were-Thanks!! |
| 5-15-11 Oh wow!!!! Thanks so much. Both of my low beams on 2004 trailblazer would go off and on periodically but finally quit all together. Fuses were ok. Could only find relay for high beams. Never would have thought they would have been under that headlight relay label. I was going to try dimmer switch which was 150 dollars. You guys rock!!!!!! |
| 5-20-11 Thanks for all the info. This is a very dangerous problem. Chevy should have a recall for this. My lights went out on me on a very dark road. I was so scared, but could not stop, due to safety reasons. This is great information. I will get this fixed as soon as possible. I'm so happy I found this before the dealership charged me hundreds of dollars!!!! THANKS ALLOT! |
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| 1-23-12 Both of my low beams went out at the same time, but I put new bulbs in and they worked. 3 months later my passenger side low beam went out. I bought another bulb, but the first one wasn't burnt out. It worked for 2 days and went out again. I noticed the wires/connector to the bulb had some black on it like maybe it had been burnt out. But the light worked right away so I didn't thinking anything of it. 2 days later it's not working again.... Any suggestions?? |
| 2-12-12 Thank you,great info. 2004 Chevy Trailcrap,low beams out, switched relays and both hi and lows work now. Of coarse I went through all the bull before I found this very helpful site. Once again THANK YOU VERY MUCH! |
