Question about 2004 Chevrolet TrailBlazer

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My 2004 chev trailblazer bottom brake lights dont work. I have replace both lamps and swapped the fuse with another 10watt still no luck. what could the problem to cause both sides not to work?

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Broken or corroded wiring on left side rear under vehicle

Posted on Oct 04, 2009

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2004 trailblazer headlights are not working in dim but bright lights work


Low beams don't work ??????? But high beams do ????? DRL - daytime running lamps ?

HDM relay # 46 low beam relay , under hood fuse box.

Aug 17, 2017 | 2004 Chevrolet TrailBlazer

3 Answers

2004 trailblazer left and right brake lights are not working but the third brake light in the middle is. What could be the problem?


Could be a bad ground in the brake wiring. If you make a ground from the socket to the frame or body, see if the lights work.

May 25, 2014 | 2004 Chevrolet TrailBlazer

1 Answer

CRUISE CONTROL WON'T WORK ON 2005 CHEVY TRAILBLAZER


check cruise control fuse and check the brake lights see if brake light working because the brake light switch will deactivate cruise control when brakes is applied.if brake lights dont work either fuse blowed or switch bad.if all is good have vechicle code scan because cruise control control by PCM and vechicle speed sensor and thottle actuator control motor.

Apr 17, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

Lowbeam headlights wont work, brake lights are out and check engine light is on...changed th dimmer switch, no luck


For the low beam problem, Swap relays 45 & 46 in the underhood fuse panel. Relay 46 is for the Low Beams. If that fixes the light, replace the relay that cam out of position 46.
Since the high mounted brake light is working, that indicates that the brake switch is good. You need to check the bulbs in the rear tail light assembly, if they are good, check fuse #34.

Sep 01, 2012 | 2004 Chevrolet TrailBlazer

1 Answer

My mom has a 2004 chevy trailblazer and her brake lights weren't working she changed the fuse they work now but her directionals aren't working at all now


Did she disconnect the negative terminal from the battery when replacing the fuse? Is it possible she swapped fuses instead of replacing them? One easy thing to try is to disconnect the battery for at least 30 min to allow the PCM (computer) to reset itself.

Sep 21, 2011 | 2004 Chevrolet TrailBlazer

1 Answer

Top middle brake light works, but both right and


Check fuse #34 in the fuse panel located under rear seat.

May 10, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

I have a 2004 Chevy TrailBlazer that just developed a problem with the left turn signal. The left turn signal indicator on the dash is blinking rapidly and the tail light turn signal is out. I change out...


The Trailblazers have a common problem with the printed circuit boards in the tail lamp housing.
Unplug the tail lamp housing at the wiring connector and test for power with a test light. ( With turn signals on) You may have an open circuit in the lamp housing circuit board. Good luck

Apr 02, 2010 | 2004 Chevrolet TrailBlazer

1 Answer

My bottom brake lights dont work 2004 chevy trailbalzer


The recall on those was the boards the bulbs mount too. Remove the lenses and then the boards. See if your bulbs are good and check for fire at the light blue, or brown and white wire. Modle dependant. Good Luck

May 22, 2009 | 2004 Chevrolet TrailBlazer

1 Answer

2005 chev trailblazer v6 4.2 rear side brake light dont work the top rear brake light works fuse 12 front works rear seat below fuse 16 and fuse 34 good bulbs good where do i check next


CHECK FOR POWER AND GROUND AT THE CIRCUIT BOARD FOR THE AFFECTED BRAKE LIGHT. IF THAT CHECK OUT GOOD THEN CHECK THE BULB CONNECTION FOR BURNED CONNECTORS, THIS IS A COMMON PROBLEM. LOOPING A TEST LIGHT FROM THE POWER TO THE GROUND CONNECTION AND HOLDING THE BRAKE PEDAL DOWN IT SHOULD LIGHT. IF IT DON'T THE CIRCUIT BOARD IS BAD.

May 16, 2009 | 2005 Chevrolet TrailBlazer

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2002 Trailblazer LS left rear brake light fails to light. Replaced socket assembly and bulbs with a set that works and it still fails to light when brakes are applied


I have the same problem with my 2004 Trailblazer LT. Driver side brake light does not illuminate. All other lights work fine. Replaced bulbs. Still does not illuminate. Cannot figure out which fuse goes to this light. Could it be a fuse?

Jul 28, 2008 | 2004 Chevrolet TrailBlazer

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