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On my 94 z71 4wd truck the brake lights wont come on...fuses are good...bulbs are good...checked brake light switch with test light the test light comes on when brake is pushed but no brake lights..im lost please help

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Check the wiring going to the lamp clusters especially the earth leads

Posted on Feb 08, 2010

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1 Answer

Brake lights wont work


check switch on brake pedal

Mar 17, 2014 | 1994 Buick Century

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1988 chevy 1500 everythingworks exept brake light turn signal ok tailghts ok no brake lights


Since the turns work in the back, that means the brake bulbs are good. Brake lights and turn signal lights share the same filament in the bulb.
There is a fuse for the brake lights. Then, there is a brake light switch on the brake pedal. You need a voltmeter or test light, after checking that fuse is good. Need to check if fuse has power on it. This is one of those fuses that are hot at all times-as long as battery is connected, voltage should be going through the fuse and up to the brake light switch. Check for power both places. The switch on the pedal is a simple on-off switch. When brake is depressed, the spring loaded switch is turned on-passing power on towards the brake lights.
But then the brake wire goes into the turn signal switch before going on to the brake bulbs...however, since your turns work good, I doubt if there is a problem in the turn switch. First check if the brake light switch is sending power on when switch is on.
Let me know what you find. Good luck.

Nov 27, 2013 | 2000 Ford Focus

1 Answer

I have a 91 ford f150 and the brake lights wont work and the rear right blinker is dim. Can you help me?


Check System Fuse - A fuse is used to protect the brake light circuit from amperage overload. If the fuse has failed it will not allow the electrical current to continue to the brake lights. To check the fuse, first locate the brake light system fuse in the fuse panel which is either under the dash or under the hood in the power distribution center. Connect the test light to a ground like an engine or dash bracket and turn the ignition key to the "on" position. Using the test light probe both sides of the fuse. If the test light illuminates on both sides the fuse is okay continue onto the next step. If one side of the fuse illuminates the fuse has failed and needs to be replaced. If the fuse fails as soon as it is replaced or when you apply the brake pedal the brake light electrical circuit is shorted to ground. Rarely a system short can occur, a car repair manual is needed to find the wiring schematic for the brake light circuit. Once the brake light wiring has been located inspect and repair as needed.

Check Brake Light Bulbs - All cars have three brake light bulbs that create the brake light illumination affect. If all of these brake light bulbs fail no brake light operation will occur. I know what you're thinking, you might say all three brake lights at once? But in reality one brake light went out at a time and you did not notice. People only tend to notice something when they almost run into the back of your car to help persuade them to inform you the brake lights aren't working. Remove any of the brake light bulbs to confirm the bulb is okay or burned. After the bulb has been removed inspect the filament and replace if failed. If the brake light bulbs are okay continue to the next step.

Checking the Brake Light Switch - A control switch is used to connect the brake light electrical circuit. This switch is located near the brake pedal lever. Basic switches have just two wires, power in and power out to the turn signal switch. Use a test light that is grounded and with the key in the "on" position test for power at one side (wire) of the switch, then press the brake pedal while testing the opposite side (wire). It should illuminate the test light, if electrical power is connected through the switch go to the next step. If no power is detected through the switch the brake light switch has failed and replacement is required. If your car is equipped with more than two wires integrated into the brake light switch a car repair manual is needed to locate the proper brake light circuit wiring.

Nov 05, 2011 | 1991 Ford F150

2 Answers

My additional brake light is not working i have tested the brake unit and that works is there a seperate fuse for this or is it all on one fuse for all the brake lights


The third or High Mounted Brake Light runs straight off the brake light switch on the brake pedal arm. You say you tested the "brake unit"? I assume you mean the third brake light assembly, and if you get power there when someone steps on the brake pedal, then the bulbs are bad.

The power flow for the brake lights goes like this: Fuse ->Brake switch -> Turn signal switch -> Rear lights. The only difference is, if you have a 3rd brake light in your rear window, that gets its power directly from the brake switch. It does not go thru the signal switch first. So, if you are having a brake light problem, and your fuses are good, check the 3rd light in the rear window, if it lights up (assuming the bulbs are good, no one ever changes them), then the problem is most likely in the turn signal switch, hope this helps!

Aug 28, 2011 | 2002 Ford SVT Focus

2 Answers

What do i check for if both brake lights do not work on my 94 camry?


check the bulbs, check the connector ,check ground and voltage power check fuses and check brake light switch right above the brake padal.

Mar 27, 2010 | 2002 GMC Envoy XL

2 Answers

94 Mazda B3000


Check the brake light switch located under the dash, and is energized by depressing the brake pedal.

Jan 28, 2009 | Mazda Cars & Trucks

1 Answer

94 toyota previa brake lights not illuminating


CHECK THE BRAKE LIGHT SWITCH UNDER THE BRAKE PEDAL

Jan 08, 2009 | 1994 Toyota Previa

2 Answers

No turn signals or side brake lights on 94 chevy suburban


the problen is probably the turn signal switch with a test light check for power at brake switch if no power check for power at turn signal switch the brake lights are incorperated through the turn signal switch

Oct 18, 2008 | 1994 Chevrolet Suburban

3 Answers

No brake lights


First Start with the Stop lights fuse Check and make sure it's good if questionable just replace it. Check to make sure you have power going into the fuse Use a 12V test light or volt meter. If you have power going into the fuse make sure the other side of the fuse has power through the fuse. Next Go to the brake light switch and test for power going into the switch if you have power put your tester on the other wire on the brake light switch and press the brake pedal, If there is power the switch is good and if not the switch is either out of adjustment or bad.
If you have power in and out of the brake light switch with the brake pedal pressed then you have to find the breadk in the wire back to the lights Oh don't forget the bulbs and the grounds for the bulbs.

Aug 01, 2008 | 1998 Chevrolet S-10 Pickup

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