Question about GMC Cars & Trucks

2 Answers

1967 GMC 2500 brake lights flash on and off except when blinkers are turned on. How do I fix it ?

Posted by on

Ad

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    New Friend:

    An expert that has 1 follower.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 61 Answers

This is definitely an earth wire problem, first check trailer plug if has one, try disconnecting, then check globe contacts and wires and all earthed wires at battery and on lighting wires.

Posted on Apr 09, 2015

Ad
  • 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.

  • GMC Master
  • 5,317 Answers

Sounds like you need a new turn signal switch. And a new flasher relay, just in case your old one got overused! Those little flasher relay cylinders were real cheap back in the day, about $2. It's under the dash around the steering column, probably in a little metal clip (yea, real metal). Don't confuse it with the hazards flasher, both look the same. You can hear and feel the turn blinker flasher when it is doing its thing, and same with the hazards flasher, if you want to check. The clicking is the make and break contact of the circuit to cause a blinking bulb.

The reason I say you need a new turn signal switch is because the brake light signal wire is routed through the turn signal switch before it goes to the rear brake light bulbs. It is inside the turn signal switch that the brakes and rear turn signal lights are made to share the same filaments inside the bulbs. The brake lights don't pass through the flasher, but somehow your turn switch is sending power to the flasher. If the wiring under your dash has not been radically altered, really messed up, then your turn signal switch has got infected with a malware virus: it is worn out and needs replacing. Good luck with that old piece of iron, Greg.

Posted on Apr 09, 2015

Ad

6 Suggested Answers

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

dennymulford
  • 1055 Answers

SOURCE: GMC sierra 1500 '96 blinkers and brake lights will not work

i would replace the brake light swtich first its more likly too go bad than the turn signal switch

Posted on Feb 20, 2009

joecoolvette
  • 5660 Answers

SOURCE: no brake/hazard lights,have running/turn signal lights

Suggest you change hazard flasher 'can' first, then go to the hazard switch. I'm betting it's the flasher can.

Posted on May 11, 2009

dennymulford
  • 1055 Answers

SOURCE: No brake lights, or no signal lights

brake lights and turn signals work off the same curcit, it could be the fuse or the brake light switch !!!!!!

Posted on Jun 06, 2009

  • 225 Answers

SOURCE: 1997 GMC Sierra p/u. Brake light & blinker out. Taillights ok.

I have notice that this is a common problem. The socket most of the time goes bad, I don't know why but they just do. You can pick them up at any parts store for around 5.00 each. If you don't have a volt meter and ground straps to test it right, then I would try changing the sockets out. Quick and easy. Let us know how it goes.

Posted on Aug 30, 2009

honda guru
  • 5 Answers

SOURCE: No dashboard lights or tail lights but I got Blinkers and brakes

most like u have a blown fuse most of the time in cars they connect the tail light and instrament lights to 1 fuse

Posted on Sep 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a 1998 gmc sonoma my brake Lights dont work but everything else does except the right blinker changed bulbs didn't help


Check brake light fuse first. If ok, the brake light switch at the brake pedal may be defective. Try wiggling the switch to see if the brake lights work. If not, disconnect the wiring connecter and if it is just 2 wires cross them over and see if the brake lights come on. If they do, the brake light switch is bad. If wiggling the switch makes the brake lights work, I would suggest a brake light switch as well

Jun 07, 2015 | GMC Cars & Trucks

1 Answer

I have a 1967 f-100 pickup and my back blinkers work and so do my parking lights but my brake lights won't I've changed the switch and that didnt help I can't understand why they won't because I've heard...


They may run off the same wires, but not the same fuse. They also depend on a relay and have to go through the turn switch. Is there power at the brake switch? That power turns on the relay. What I do is pull out the brake relay and interrogate the relay socket with a volt/ohmmeter. Are you up for that?

Jul 30, 2017 | Cars & Trucks

1 Answer

I have a 1990 Chevy Suburban v1500. All lights work except for the Brake Lights and Turn Signals. The Blinker switch on steering column is broken, other than that everything is fine.


Yes, the brake light signal on American cars is routed through the turn signal switch. A new switch should restore both your turns and your brake lights.
American cars use the same bulb filament and same wire to the rears for both brakes and turns. Press the brakes when turning and both rear brakes will light, but since one side travels through the flasher relay, that side will blink, while the other side has a steady light.

Apr 06, 2013 | 1990 Chevrolet Suburban

1 Answer

No brake lights.....


one element is for brakes/turn the other one on the same bulb is running lights how ever the part about brake lights go threw the turn signal switch the turn signal switch has diodes in it so that both rear light don't light up when turning i hope my explenation helps and yes some years gmm had bad tail light circuit boards you can test the connector at the lens housing with a test light there is also a plug connector where the bed meets the frame in the rear

Aug 19, 2012 | 1989 GMC K1500

1 Answer

Changed multi function switch, bulbs, and passenger side rear light assembly (reverse, blinker, brake light). Everything works except the rear passenger side turn signal but the front passenger side is...


You have a bad connection at the rear passenger side turn signal. It is either the connection is corroded or a wire is loose on the ground side of the circuit.

Nov 11, 2010 | 2006 Dodge Ram 2500

1 Answer

Left taillight doesnt work, neither does brake


you got a bad ground on the taillight circuit

May 12, 2010 | 2006 Dodge Ram 2500

1 Answer

Right turn signal stays on will not flash left works.2001 jimmy


its your blinker box.. all major lights run through there

Aug 04, 2009 | 2001 GMC Jimmy

1 Answer

1986 GMC new wires to tail light assemblies ... all functions work EXCEPT BRAKE LIGHTS ? ?


Had a 97 regal no brake lights, but the brake light in window worked. Need to replace blinker unit in steering column. Not too hard. Got one from salvage. Hope this helps. LB

Jul 19, 2009 | 1997 GMC Jimmy

1 Answer

No brake lights, or no signal lights


brake lights and turn signals work off the same curcit, it could be the fuse or the brake light switch !!!!!!

Jun 05, 2009 | 2000 GMC Sierra

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

Related Topics:

141 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

76164 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

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

Answer questions

Manuals & User Guides

Loading...