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GMC C 3500 1992 sierra do hazard lights work off the same circuit as back brake lights Orange wire from brake switch no power

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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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

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  • 5 Answers

SOURCE: 1997 gmc 3500 box truck. no brake lights. changed

Check the fuse.

Posted on Sep 18, 2009

  • 15 Answers

SOURCE: my 1999 gmc sierra's brake lights don't come on

There's a switch at the top of your brake pedal. They wear out, chance are that's the problem, easy fix in the driveway.

Posted on May 05, 2010

kapishtech
  • 2272 Answers

SOURCE: 1998 gmc sierra-no brake lights,bulbs

Try this possibilities to locate the fault. First get your voltmeter or 12v test lamp out. Check the 30 amp Brake (#2) maxi fuse in the under hood junction box.Fuse should have 12v at both sides at all times.
If okay proceed.
Go to the brake light switch. The orange wire should have 12v at all times. The white wire should have 12v when stepping on the brake.
If okay, proceed.
Next thing is the brake lamp relay in the underhood fuse box. Swap the relay with one that looks just like it and recheck the brake light operation. If the relay is no good replace it.
If the relay is swapped and still not working, see if you can feel the relay clicking when someone else steps on the brake pedal.

batt is power from the maxi fuse 12v all times
sls is the white wire from the brake switch 12v with brake applied.
gnd is body ground 0v all times
mfs goes to the multi function switch 12v with relay activated
the circuit is simple—power from the brake light switch white wires turns on the relay which then sends power back to the multifunction switch for distribution to the rear lights.
if you jump terminals batt and mfs the brake lights should come on.
If you have no power at terminal sls with the brake applied then you have a wiring fault white wire between the brake light switch and the relay
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Posted on Aug 17, 2010

  • 4977 Answers

SOURCE: tail lights not working. fuses

do the front marker/park lights work if not you could have a bad light switch on the tail light side of the switch.you need to check the brown wire at the back of the truck in the wiring harness as this is the tail light wire that feeds the bulbs.if you have power there then you will have to check for power at the socket,if no power at the socket but were you check the wire then there is a problem between the two that you will have to check out.if there is no power when checking the wire then you will have to check for lose of power between the switch and rear wiring.make sure the fuse is good by using a test light and not by looking as sometimes they look good but don`t work.

Posted on Jul 11, 2011

Testimonial: "Thanks a million!!! problem solved, just a simple loose connection at switched saved me $$$$ from taking it to the shop. thanks for the info!!"

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1 Answer

Does anyone know what color the hazard light wire is coming from hazard switch on 1996 gmc sierra?


sure, IN USA.
the FSM shows, that (factor service manual)
or alldata.com .
what is best is the schematic.
this is the world wide web and GM exports cars and trucks
and all are wired differently (laws in your country,etc)
1960-2000 United States (see alldata.com for fast answer)
1965-2000 Canada
1964-2001 Brazil


Jun 22, 2014 | 1996 GMC Sierra

1 Answer

Why won't my hazard lights work on my 1996 GMC Sierra pickup.


Do you have power in and out of the hazard flasher ?

Jun 15, 2014 | 1996 GMC Sierra

1 Answer

Where is the brake relay on a 2001 gmc sierra.


Try wiggling the hazard light switch while pressing on the brakes.The taillights are connected to the turn signal switch before it goes to the brake switch.The contacts on the hazard switch are probably dirty(I remember this problem years ago,same symptoms-3rd light works but l/R tailights not working).You may just be able to turn the hazards on+off a bunch of times to clean the contacts instead of replacing the switch.

Jun 13, 2012 | 2001 GMC Sierra 1500HD

1 Answer

Tail lights not working. fuses look good, brake lights work, hazards work, but running lights don't- gmc sierra 2500


do the front marker/park lights work if not you could have a bad light switch on the tail light side of the switch.you need to check the brown wire at the back of the truck in the wiring harness as this is the tail light wire that feeds the bulbs.if you have power there then you will have to check for power at the socket,if no power at the socket but were you check the wire then there is a problem between the two that you will have to check out.if there is no power when checking the wire then you will have to check for lose of power between the switch and rear wiring.make sure the fuse is good by using a test light and not by looking as sometimes they look good but don`t work.

Jul 11, 2011 | GMC Sierra 2500 Cars & Trucks

4 Answers

1998 gmc sierra-no brake lights,bulbs ok,new brake switch,possible wiring?? Help


Try this possibilities to locate the fault. First get your voltmeter or 12v test lamp out. Check the 30 amp Brake (#2) maxi fuse in the under hood junction box.Fuse should have 12v at both sides at all times.
If okay proceed.
Go to the brake light switch. The orange wire should have 12v at all times. The white wire should have 12v when stepping on the brake.
If okay, proceed.
Next thing is the brake lamp relay in the underhood fuse box. Swap the relay with one that looks just like it and recheck the brake light operation. If the relay is no good replace it.
If the relay is swapped and still not working, see if you can feel the relay clicking when someone else steps on the brake pedal.

batt is power from the maxi fuse 12v all times
sls is the white wire from the brake switch 12v with brake applied.
gnd is body ground 0v all times
mfs goes to the multi function switch 12v with relay activated
the circuit is simple—power from the brake light switch white wires turns on the relay which then sends power back to the multifunction switch for distribution to the rear lights.
if you jump terminals batt and mfs the brake lights should come on.
If you have no power at terminal sls with the brake applied then you have a wiring fault white wire between the brake light switch and the relay
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Aug 17, 2010 | 1998 GMC Sierra

1 Answer

Brake lights dont work, replaced switch, checked for power, power to switch, power to fuse, checked wiring to back end, all appears to be good, put power to white wire, no brake lights still, i need some...


You hit it on the nail, you have check every thing we would have checked here at my repair shop, it's going to be the turn signal switch, as you now the brake light circuit run's through it and more then likely your center top brake light works.Bad switch (turn signal).

Jul 07, 2010 | 1991 GMC Sierra

1 Answer

Brake lights dont work


make sure your geetin 12v to brake switch if not jumper a wire then try it

Mar 21, 2009 | 1989 GMC Sierra

2 Answers

1998 GMC Sierra Signal Fuse Blowing


it seems you have a short in either one of the lights or interlock. all are connected to the same fuse. trace the wiring from the fuse box back to the component. Using a test light test in between the wires. check for any obvious breaks in the wiring.

Dec 06, 2008 | 1991 GMC Sierra

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