on my 2005 trailblazer the headlights will turn themselves on.

Asked by Oct 12, 2014 at 02:41 PM about the 2005 Chevrolet TrailBlazer EXT LT 4WD SUV

Question type: Maintenance & Repair

my 2005 trailblazer's headlights will turn themselves on even after the vehicle has been locked for an hour or more . it has caused the battery to be run down and prevented the vehicle from starting unless it is "jumped". it doesn't do it all the time , any ideas ? it has the 5.3 v8 engine  thank you

5 Answers

15,965

Do you have lights that turn on automatically after dark? The switch may be defective. If not you may have a short in the switch. The only way lights will turn on is if there is power applied to the system. The switch is where the break is in the electrical system. If you can, feel the switch after the lights are on and see if you can feel heat from an electrical short. Find out quickly before the fire department is called to put out the fire.

7 of 7 people found this helpful.
90

solid state relay i do beleive its 46 is failing just had it happen to me the relay is in the fuse box

8 of 8 people found this helpful.
15,965

Well I just thought of something. Is this part of the GM recall on ignition switches? Check it out as to what the issues were on the recall. If the symptoms are the same, talk to GM, not a dealer, but to GM about the possible switch being defective.

3 of 3 people found this helpful.
40

The same problem happened exactly to my car Trailblazers 2005! When I went to garage the Mechanical said to me bullshit things such as he has to chick all car Electrical system to find what kills the battery and it's gonna cost me $1250! Then I asked a friend he has a garage too, he asked me to chick the box fuse and replace the relay that feeds the headlamps which was number 45. So I changed the relay number 45 with new one costs me $31 and it worked with me. Be careful, You don't need to change the battery, it's just the relay that feeds the headlamps which kills the bettrery while the vehicle has been locked!

4 of 4 people found this helpful.
10

I too have a 2005 Trailblazer with the same issue... .just went out and bought a relay and it fixed the problem.... $37.00

1 of 1 people found this helpful.

Your Answer

TrailBlazer EXT

Looking for a Used TrailBlazer EXT in your area?

CarGurus has 1,035 nationwide TrailBlazer EXT listings starting at $2,000.

ZIP:

Chevrolet TrailBlazer EXT Experts

  • #1
    jimjimjim
    Reputation
    440
  • #2
    John Carson
    Reputation
    130
  • #3
    chevyp2p
    Reputation
    110
View All

Related Models For Sale

Used Chevrolet TrailBlazer
81 Great Deals out of 4,568 listings starting at $1,300
Used Chevrolet Tahoe
732 Great Deals out of 41,543 listings starting at $1,995
Used Ford Explorer
934 Great Deals out of 68,717 listings starting at $1,800
Used GMC Envoy XL
9 Great Deals out of 684 listings starting at $2,795
Used Chevrolet Suburban
377 Great Deals out of 22,880 listings starting at $1,999
Used Chevrolet Equinox
986 Great Deals out of 61,307 listings starting at $999
Used GMC Envoy
50 Great Deals out of 2,167 listings starting at $1,700
Used Chevrolet Silverado 1500
2,262 Great Deals out of 169,082 listings starting at $1,000
Used Chevrolet Blazer
3 Great Deals out of 1,071 listings starting at $950
Used Dodge Durango
263 Great Deals out of 22,814 listings starting at $895
Used Jeep Grand Cherokee
849 Great Deals out of 70,704 listings starting at $700
Used Chevrolet Avalanche
181 Great Deals out of 5,109 listings starting at $2,494
Used GMC Yukon
474 Great Deals out of 22,228 listings starting at $1,995

Used Cars For Sale

2004 Chevrolet TrailBlazer EXT LT 4WD SUV For Sale
3 Great Deals out of 68 listings starting at $2,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.