Question about 2004 GMC Envoy

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My break lights do not work when I press on break. the bulbs r good

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Please check your brake switch on brake rod for malfunction. You can the power there by using DC voltmeter. Attach your DC voltmeter + lead to out going power cable while - lead to body. Now engage your brake, if there no voltage showing on your volt meter, your brake switch or incoming power fail and need to replace or repair.

Posted on May 18, 2011

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Check the brake light switch located at the top of the brake pedal arm under the dash

Posted on May 18, 2011

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1 Answer

Break lights and blinkers not working


If you put the tester on the outlets and it lights up properly but the bulbs dont, you have already concluded that the wiring isn't the problem. unless of course the wires are corroded and simply putting the bulb in shorts it out. Have you tested the bulbs?

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Hell i just bought a chevy cavlier and my back break light is out...the light its self is on...its just the break light when pressed...


you don`t say if its both or just one brake light out.you say the light itself is on but not if you mean tail light or what.the tail lights use a different filament in the bulb than the signal light which is the same filament that the brake light uses.if the signal light work on the rear then the bulbs are good,if just one side works then the bulb is no good on the side that doesn`t work.if the signal lights work but neither brake light works then you need to check the fuses in the fuse panel under the dash on the drivers side.if the fuses are good then it will be either a bad wire at the brake switch or a bad brake light switch,this is located on the brake pedal lever under the dash.

Mar 18, 2011 | 1999 Chevrolet Cavalier

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All fuses are good and bulbs tail lights even work. but no brake lights


Check the break switch under the break peddle. There sould be some kind of switch with a button on it that is always pushed untill you press the break peddle. The switch goes bad sometimes.

Feb 04, 2011 | Isuzu Pickup Cars & Trucks

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On my 2004 expedition one of the break lights is not working. the parking light work fine, but when I press the break the passenger side break light does not come on. I changed the bulb and that did not...


check the electrical contacts within the bulb fixture for oxidation or damage. Check also the wires and wire harness for damage or connection problems.

Oct 26, 2010 | 2004 Ford Expedition

3 Answers

Brake lights don't work. Replaced bulbs, checked


Yes, you need to of course check the voltage coming into and going out of the brake light switch, if 12 Volts are there going out and coming in while pressing on the brake pedal, your brake lights aren't getting a good ground or there is a break in the circuit between that switch & the lights.

On occasion the tail lights will work with a weak ground circuit where the Brake lights won't. Best way to determine this is to just hook up the 12 volt tester to the Brake light hot wire & there at the bulb ground, then in an area away from the bulb that has a good possibility of contact/ground.

Really that's it, if the 12Volts is getting to the bulb but it isn't lighting, if you aren't getting the voltage there and the brake switch is hot on both sides when pressed, the break in voltage will have to be traced from that switch to the tail light to find the problem.

good luck.

Feb 22, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

2001 GMC Jimmy break lights not working but all


Check the brake light switch should be a orange wire with 12v then a white wire with 12v when the pedal is pressed.If htat cks good then ck the hazard switch by moving it up and down and wiggeling the knob with the brake pedal pressed if they start working then your multifunction switch is bad and needs to be replaced.

Feb 20, 2010 | 2001 GMC Jimmy

2 Answers

My brake lights stop working . So I replacd yhe light bulb but the brake light still don't work.


I know what it is. I have the same problem. Try, when pressing the break, pulling your turning signal lever towards yourself, but not all the way to turn on the brights. If your breaks light up then you need a new turn signal switch. Part of the switch disables the break lights when that flasher comes on, but when it goes bad, it wont let the lights com on at all.

Nov 05, 2009 | 1999 Chevrolet Monte Carlo

1 Answer

Break light problem


Do you know if the brake light bulbs are working? (are the bulbs good?). (the bulbs have two parts, one for brake lights the other for running lights)
If the third brake light bulb is working the brake lights should be with good light bulbs.

Jul 22, 2008 | 2005 Honda Accord

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