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treye fields Posted on Apr 12, 2017
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Headlights won't work on my 96 GMC Sonoma flashers and signals work and running lights getting power when headlight switch is on what could be the problem.

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Jeff Armer

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  • GMC Master 15,575 Answers
  • Posted on Apr 12, 2017
Jeff Armer
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No high or low beams ? DRL ? Do you know how to check for B+ voltage with a volt meter ? Here is a web site for free wiring diagrams http://www.bbbind.com/free_tsb.html Enter the vehicle info. year , make , model an engine size . Then click on lighting under system , then click on headlamps . Click the search button , then click on the blue link . With a volt meter check power an grounds , Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts

Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

Could be the headlamp switch or dimmer switch or blown fuse or a wiring problem etc.... testing the circuit is the way to a proper fix , not replacing parts or listening to someone on here say it this or that ! Test don't guess .

5 Related Answers

joecoolvette

joecoolvette

  • 5660 Answers
  • Posted on May 11, 2009

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.

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Jesse

  • 90 Answers
  • Posted on May 19, 2009

SOURCE: 98 jeep wrangler headlights wont turn on

I would check your headlight relay switch that is located in your steering colum

Bob B

  • 272 Answers
  • Posted on Jun 02, 2009

SOURCE: 1997 sonoma turn signal flasher

The flashers are located behind the instrument panel trim, roughly between the base of the steering wheel and the ashtray, just to the left of the car lighter. To access the flashers, you need to at least loosen the lower instrument panel trim. Just under the steering column there are two screws with star heads. One to the left of the column and one to the right. You need to remove both of these screws. You will need to remove your ashtray. On the upper left corner of the hole left by removing the ashtray is a 9/32 hex head screw. You need to remove it. Once these three screws are removed you should be able to pull down on this portion of trim under your instrument cluster. When you do this it may cause trim around your instrument cluster to loosen that you can just pop back into place with your hand. You won't need to pull down to far on this trim piece as there are still some screws holding the bottom. You should be able to pull it down far enough to see the flasher units behind and just to the left of the cigarette lighter. There are two flasher units and I found that the one on the right is for the turn signals.On the left the other is for the hazard flashers. It may be a hand scraping experience to replace the flasher but it beats paying someone to do it for you. They are easy to recognize because the are silver and round metallic plug ins. The flasher unit on the left is for the emergency flashers and the one on the right is for turn signals. You can place the emergency flasher unit into the slot the turn signal unit belongs until you get a replacement. These flasher units are pretty cheap.

Anonymous

  • 4102 Answers
  • Posted on Sep 16, 2010

SOURCE: 96 Volvo 850 Turbo. Both headlights went out but

Hi, the problem you are having is with the switch itself, this is a common problem so the switch is not expensive to buy.

once you replace the switch the lights will work as normal.

if it was just one light not working then you could say bulb if the high beam wasnt working then you could say it was fuse or relay but as you have high beam this would rule out them being the fault.

now the only other problem it could be is a wire so give the wires a bit of a wiggle at the back of the head lights then give them a try if they then work you may need to do some soldering to fix a loose wire but if they still dont work then this would suggest the switch itself is at fault.

let me know how you get on or if you need further assistance ok

Anonymous

  • 1 Answer
  • Posted on Oct 26, 2010

SOURCE: my headlights on my 1998 buick regal will not come

Daytime running light module!!!! $400.00 from the dealer..lol

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2answers

I have a 1996 gmc Sonoma. Headlights will work sometimes.

Consider the dimmer switch on the steering wheel; the wires from it wouldn't affect the tail lights, but could possibly affect the headlights. Hopefully loose wires from the assy is the problem.. replacing the unit might be difficult. or expensive.
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Headlights and driving lights do not work what might be the proublem?

First, check for output voltage at the headlight switch when the switch is turned on. If you do not get output voltage at the switch, replace the switch, and you'll be good. Otherwise, read on.
A common problem with those GMC and Chevy trucks is that they used too small of a gauge for the headlight wiring under the dashboard. You will need to use a voltmeter to check all points of the headlight wiring from the switch to the headlights to determine where the voltage is lost, and will very likely need to replace some wiring. PLEASE BE SURE YOU USE HEAVIER GAUGE WIRE THAN WAS USED BY THE FACTORY, so that you can avoid having to re-do the work in the future.
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My 96 ranger turn signals & hazards don't work. Brake lights, headlights, running lights work fine. I replaced the flasher relay, and still nothing. Does anyone know what else to try?

It Could Be The Flasher Switch Or Turn Signal Switch Now This May Not Be Whats Wrong with Yours Now My Ignition Switch came Apart on my car and i lost turn signals and E flashers i hope one of these will help
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Brake lights don't work. Fuse is good, bulb is good, but brakes still won't come on. GMC Sonoma 1994.

please check your brake light switch located near the brake pedal. it could be faulty.

tnx 4 using fixya,

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