what causes the dim lights to go on and off ?


Asked by Apr 01, 2013 at 02:50 PM about the 2006 Chevrolet TrailBlazer

Question type: Maintenance & Repair

20 Answers


the dim lights?

13 out of 13 people think this is helpful.
Best Answer

a bad ground. Follow the negative battery cable from the terminal down to the chassis and engine...make 'em all sparky fresh and clean, put 'em back together and this "dimming" will go away.

6 out of 6 people think this is helpful.

Sometimes my dim lights will work and sometimes they go out going down the road and they flicker off and on while sitting still.

40 out of 40 people think this is helpful.

I think you are talking about you dash lights, try slowly rotating the dash illumination dial and watch the lights, if they flicker or just go out then there is you problem a bad switch. If they don't then you need to get in the dash and check all of the cluster connections.

3 out of 3 people think this is helpful.

oh the low beam headlights. you had me thinking some sort of light was dim, if included headlights in your question that would have been better.

9 out of 9 people think this is helpful.

If you're talking low beams, they are on a circuit breaker instead of a fuse. You could be drawing too many amps, tripping the breaker and it comes back on when it resets.

5 out of 5 people think this is helpful.

we still dunno what lights your talking about. Is this the guessing game?

1 out of 1 people think this is helpful.

dirty potentiometer or rheostat~

1 out of 1 people think this is helpful.

kbro, think he's talkin' about the dash lights seeing as he's unresponsive to anything responsible~

1 out of 1 people think this is helpful.

Aint no telling judgy. hey I just noticed he have a new #1 Guru.

H25....mellow fellow....will back him on everything he says!

Kimberly Rains

I have a 2006 trailblazer and it does the same thing, the dim lights just go off, they may stay off 5 minutes or 5 hours.... we have changed All of the relays and fuses and replaced the bulbs, I am scared to be out at night because of it. The brights still work, but people get real upset with me!!

31 out of 31 people think this is helpful.

the BCM body control module has a mind of it's own and frankly, those who have them wish they could turn them off, sure there's gotta be a way, involving the terms "menu" and "select" and plenty of beep beep this and that membrane switch activation what has you feeling as confident as standing in a pool of ankle-deep chicken stock~

the mini has two pages on what you can do with the three buttons on the key controller and is a pain in the gazooka~


Sounds a lot like the same problem I had w/my 2006 Trailblazer. The headlights went completely out while I was driving. Can't remember if I had hi or low beams on. I tried to switch back & fourth between hi & low but still no lights. My dimmer switch is on the same arm as my turn signals & cruise control (off of the steering column). Flicking it forward turns on hi beam, flicking back turns on low beam. Not exactly sure what it does if I pull it back past the low beam slot & hold it. The lights did come on when I did that but they were brighter than the normal hi beams (could it have turned on both low & hi beam headlights @ the same time?). When I let go the headlights went back out again. While I was pulled off the road waiting, they suddenly came back on w/me doing nothing. It has ~130,000 miles on it. It had ~85,000 when I bought it. It did this a few months ago, never did it before & hasn't since but then I also pretty much quit driving it @ night. Is there something simple enough that I can do to fix it or does if require taking it to a licensed mechanic?

27 out of 27 people think this is helpful.

will check into the existence of a headlight relay...gonna have to find your schematic.~

2 out of 2 people think this is helpful.

2007 Chevy Trailblazer: This morning (early hours in the dark), my headlights (standard, not hi-beam) started flickering and then went out and then came on again and then flickered again and went out and stayed out....while I was on the interstate. Scary! All other lights work, parking lights, tail lights, dashlights, etc. Would a bad relay/fuse cause the lights to flicker first before they go out or should I take it to have the electrical checked out?


Catlady the most common cause for the headlights to flicker and then go out is the headlight switch itself, it has a built in circuit breaker that can get weak over time, but the wiring should be checked just to make sure there is no shorts.

1 out of 1 people think this is helpful.

Thank you tennisshoes. I almost wasted money on a new relay. Good thing I saw this first. I will see if I can find somewhere to take it. Thanks again!


Most independent shops can handle this, just make sure they are certified by ASE or ASP.

Your Answer

Add photo

Related Questions



    Chevrolet TrailBlazer


    Maintenance & Repair

  • Lights dimming while sitting at light,alt gauge goes way down. 3 answers

    Lights dim when at red light, gauge goes way down, when I step on gas gauge goes up and lights ok. Doesn't happen all the Tim. Have new battery and changed alt 3 times. Any ideas. Thanks

    2006 Chevrolet TrailBlazer LS


    Maintenance & Repair

  • I own a 2005 Chevy Trailblazer the check engine light came on and will not go off. 16 answers

    I've had this happen before after getting gas but it usually turns off after tightening gas cap and driving for a while. What other reason could the check engine light be on for. Should I be serious...

    2005 Chevrolet TrailBlazer LS 4WD


    Maintenance & Repair

  • why is my transmission getting hot wen going uphill 10 answers

    hi this jorge this Saturday wen I was going to camp Verde I was going about 75 mph going uphill and wen I got back to straight highway my suv read trans hot idle engine and started smoking but I...

    2002 Chevrolet TrailBlazer LTZ 4WD


    Maintenance & Repair

  • Drivers headlight is dim 7 answers

    I have a '98 Cavalier Z24 that the fog lights, running lights, park lights, & cruise control work fine until I turn on the head lights, then the drivers headlight goes dim and so does the fog light. O...

    1998 Chevrolet Cavalier Z24 Coupe


    Maintenance & Repair


Looking for a Used TrailBlazer in your area?

CarGurus has 6,214 nationwide TrailBlazer listings starting at $1,600.


Search Chevrolet TrailBlazer Questions

Chevrolet TrailBlazer Experts

#1 Tom Demyan
Tom Demyan
Reputation 640
#2 dandyoun
Reputation 540
#3 tennisshoes
Reputation 500
View All

Related Models For Sale

Used Chevrolet Tahoe"
1,043 Great Deals out of 36,533 listings starting at $1,695
Used GMC Envoy"
87 Great Deals out of 2,587 listings starting at $2,500
Used Jeep Grand Cherokee"
1,212 Great Deals out of 73,903 listings starting at $1,200
Used Ford Explorer"
1,336 Great Deals out of 71,183 listings starting at $985
Used Chevrolet TrailBlazer EXT"
21 Great Deals out of 1,539 listings starting at $1,854
Used Chevrolet Silverado 1500"
2,380 Great Deals out of 143,345 listings starting at $1,195
Used Chevrolet Blazer"
1,628 listings starting at $1,891
Used Chevrolet Impala"
893 Great Deals out of 35,537 listings starting at $795
Used Chevrolet Equinox"
1,526 Great Deals out of 67,028 listings starting at $900
Used Dodge Charger"
669 Great Deals out of 30,158 listings starting at $1,995
Used Dodge Durango"
386 Great Deals out of 22,494 listings starting at $995
Used Ford Escape"
1,669 Great Deals out of 94,879 listings starting at $500
Used Ford F-150"
3,177 Great Deals out of 215,801 listings starting at $1,000

Used Cars For Sale

2009 Chevrolet TrailBlazer For Sale
8 Great Deals out of 145 listings starting at $4,500
2008 Chevrolet TrailBlazer For Sale
43 Great Deals out of 865 listings starting at $2,895
2007 Chevrolet TrailBlazer For Sale
28 Great Deals out of 956 listings starting at $1,600
2006 Chevrolet TrailBlazer For Sale
31 Great Deals out of 1,021 listings starting at $1,795
2005 Chevrolet TrailBlazer For Sale
24 Great Deals out of 953 listings starting at $2,450