Question about GMC Sierra 2500

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No brake/hazard lights,have running/turn signal lights

1991 gmc 2500 pickup no brake/hazard lights. have turn and running lights. power to brake switch but not to plug under truck could it be turn signal switch or hazard switch or hazard flasher can?

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  • Anonymous May 15, 2009

    1991 gmc 2500 pickup no brake/hazard lights. have turn and runninglights. power to brake switch but not to plug under truck could it beturn signal switch or hazard switch or hazard flasher can? replaced flasher can still no luck,any other thoughts,its driving me nuts. put in new brake switch and new turn signal switch still only running and turn signal lights. no hazard/brake lights.even put in new tail lights

  • Anonymous Mar 19, 2014

    when brakes applied or hazards the fuse blows


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

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.

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