# 2007 Chevy Trailblazer Headlights go out at random while driving at night **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** transmissions, headlights\ **Created:** [August 25, 2014, 4:36am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801 "2014-08-25T04:36:08Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![302trucker](https://avatars.discourse-cdn.com/v4/letter/3/3bc359/32.png) [@302trucker](https://community.cartalk.com/u/302trucker)\ **Post date:** [August 25, 2014, 4:36am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/1 "2014-08-25T04:36:08Z")
While driving at night time the headlights will go out at random. The marker lights will stay on and the lights will still not turn on if I switch the light switch from “automatic” to “on”. When the lights are out I can use the highbeams while in “automatic” or “on”. ---
**Author:** ![BustedKnuckles](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bustedknuckles/32/25_2.png) [@BustedKnuckles](https://community.cartalk.com/u/BustedKnuckles)\ **Post date:** [August 25, 2014, 4:52am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/2 "2014-08-25T04:52:05Z")
You have either corroded contacts at the headlight bulbs or the bulbs are bad. Replacing the bulbs will most likely fix the issue. ---
**Author:** ![302trucker](https://avatars.discourse-cdn.com/v4/letter/3/3bc359/32.png) [@302trucker](https://community.cartalk.com/u/302trucker)\ **Post date:** [August 25, 2014, 4:57am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/3 "2014-08-25T04:57:00Z")
I will pull them and check them, thanks. If anyone else has any more ideas I’m still all ears! ---
**Author:** ![insightful](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/insightful/32/2732_2.png) [@insightful](https://community.cartalk.com/u/insightful)\ **Post date:** [August 25, 2014, 5:01am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/4 "2014-08-25T05:01:41Z")
When Honda Civics had this problem a few years back, there was a recall for faulty light switches. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 25, 2014, 5:08am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/5 "2014-08-25T05:08:50Z")
When the low beams are turned on, the headlight switch sends a signal to the Body Control Module which then energizes the low beam headlight relay which causes the contacts to close in the relay causing the low beams to turn on. So it could be the headlight switch, the BCM, or the low beam relay that’s causing the problem. Tester ---
**Author:** ![vipergg](https://avatars.discourse-cdn.com/v4/letter/v/50afbb/32.png) [@vipergg](https://community.cartalk.com/u/vipergg)\ **Post date:** [June 4, 2018, 10:28pm UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/6 "2018-06-04T22:28:58Z")
Bad HDM . It is a known issue in these and was even a recall item on certain years, 2007 -8 I believe . ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [June 5, 2018, 12:05am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/7 "2018-06-05T00:05:43Z")
I would hope after 4 years the problem is solved. ---
**Author:** ![302trucker](https://avatars.discourse-cdn.com/v4/letter/3/3bc359/32.png) [@302trucker](https://community.cartalk.com/u/302trucker)\ **Post date:** [June 5, 2018, 2:00am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/8 "2018-06-05T02:00:35Z")
The issue wasn’t repaired but the vehicle was traded in long ago ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [June 5, 2018, 2:17am UTC](https://community.cartalk.com/t/2007-chevy-trailblazer-headlights-go-out-at-random-while-driving-at-night/86801/9 "2018-06-05T02:17:34Z")
I didn’t realize again it was four years old but for benefit anyway, I do believe there is a separate circuit breaker for the low beams and the high beams. Also parking lights would be on a different circuit. So if you have a problem with one, you can switch to high beams. I would also consider a bad switch as a possible issue that is causing the circuit to overheat and trip the breaker. On my Riv though when I had that problem, I disconnected the twilight sentinel that turned the lights on automatically and all was fine after that. Its kind of a shock driving along and having the lights go out. No good can come of it.