Question about Cars & Trucks

1 Answer

Brake lights don't work but all other lights do. It's a 1990 Chevy 1500 short wheel base and I have replaced both circuit boards all bulbs brake switch and fuses are good. Checked and replaced ground

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Cars & Trucks Master
  • 11,492 Answers

Do you know what electrical testing is and how to do it ? apparently not ! Do you know what a wiring diagram is and how to read one ? Is there B+ voltage going into the brake light switch ? Test this first with a DVOM - digital volt ohm meter . If there is , with the brake pedal pressed ,is there B+ voltage coming out of the switch ? Find a diagram of the wiring harness connector locations look at every connector the brake light wires are in > Check voltage at each connector till voltage disapears . find the open wire , high resistance , what ever is cause B+ voltage not to be there . Watch videos on youtube for voltage drop testing . Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia How to read a wiring diagram . Buy a repair manual . Sorry dude , but if you want to fix car's , learn how .

Posted on Dec 29, 2016

Testimonial: "If you want to be a smart a@# hole don't answer at all. I was showing another person how to search a problem and you just showed how most people like to think that they are above others. Way to talk to a young person trying to learn !"

  • 1 more comment 
  • William cundiff
    William cundiff Dec 30, 2016

    Have been doing auto and diesel repair 30 years. I build drag cars and boats.

  • Jeff Armer Dec 30, 2016

    Good for you , I been doing auto repair over thirty years , started in the late 60's . I have worked at Many GM dealer ships . I was on the pit crew of a drag race team . Why don't you teach them how to do electrical trouble shooting , not how to look for a magical fix . Half these people on here have no business trying to fix the modern automobile .I see it daily were there add on aftermarket junk. Try tying into data bus wires bring down the bus.If you so smart what's C.A.N

  • Jeff Armer Dec 30, 2016

    And if he want's to lean go to school !

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

On my 1997 Chevy truck my brake lights don't work


check your grond wire a lot of times they will corrode and lose connection after you check fuses bulbs etc.

Apr 18, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

I need a wiring diagram for a 98 chevy suburban. My brake lights don't work. Checked fuse bulbs and brack light switch.


above the steering column there is a 6 way plug, it is an actual jumper harness to the brake switch it is held in place by a rosebud, pop the rosebud out and check the plug for being fully seated, I have seen many of these that have been partially pulled apart and it actually breaks the circuit/and can short it out, other than that if thats o.k. then your turn signal switch in column is defective.

Jan 14, 2012 | 2003 Chevrolet Suburban 1500

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

Lights


the circuit boards where the bulbs plug into are notorious for malfunctioning.you need to replace the circuit boards.they are available aftermarket.

Jul 30, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

I have a 1990 chevy s10,all my lights work except my brake lights


Do you have power with a test light in and out of the switch? Do the turn signals work? Will the brake lights work if you play with the turn signal handle?

May 06, 2009 | 1990 Chevrolet S 10 4WD

1 Answer

98 Suburban Brake and hazard lights don't work


Check for power and ground at the two panel lights. GM uses a cheep circuit board design, they overheat and corrode on the other side of the board. not serviceable.

May 03, 2009 | 1995 Nissan Sentra

2 Answers

Brake lights do not work, all other lights work.


It is a common chevy problem for the circuit board that holds to bulb to fail, are your running lights and signals still working back there as well? If not then you need to replace the boards.

Dec 12, 2008 | 2007 Chevrolet Silverado Classic SS New...

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

18 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Randy Ohler

Level 3 Expert

14585 Answers

Are you a Car and Truck Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...