Question about 1999 Chevrolet K1500

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CHEVY 1500 TRUCK HEADLIGHTS TURN OFF WHEN YOU TURN ON SWITCH

I HAVE A 1998 CHEVY 1500 EXT. CAB TRUCK. THE HEADLIGHTS WORK FINE AS A RUNNING LIGHTS BUT AT NIGHT WHEN YOU TURN THEM ON THEY TURN OFF BUT THEY WORK FINE IN THE SWITCH IS IN THE PARKING LIGHT POSITION AND THE HIGH BEAMS DON'T WORK AT ALL, THE INDECATOR DOSN'T EVEN COME ON ON THE DASH. I CHECKED THE FUSES UNDER THE HOOD AND THE FUSE PANEL ON BOTH SIDES OF THE DASH WITH A VOLT METER. I HAVE REPLACED THE LIGHT SWITCH .I HAVE THE REPAIR MANUAL BUT ITS NOT TO CLEAR EVEN THE WIRING SECTION.

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  • mdwalsh6 Nov 19, 2008

    I'm having the exact same problem with my 1997 Chevrolet K1500 ext cab.

  • mmullins6 Jan 03, 2009

    I have the same problem. When I turn my headlights on, they turn off. I have changed the headlight switch and checked all the fuses. Any help with this is appreciated.

  • Anonymous Mar 16, 2014

    My speedometer doesnt work on my 1990 Chevy 1500 Ext cab. Is there a fuse for this or what could be some problems thanks!

  • Anonymous Mar 21, 2014

    the only connections that ar unplugged that i know of are the seat belt sensors, the drivers side horn and the wiper washer fluid pump.
    all fuses are fine
    when the key is turned too the first position
    the dash lights up fine showing milage and that its in the correct gear
    then when the key is in the next position or when the truck is running the dash doesnt show what gear i am in, milage the 4x4 buttons do not light up or engage 4x4 the power windows do not work but the truck runs fine,
    i just replaced the battery, checked the connections and everything is good as far as i can tell?

  • Anonymous Mar 25, 2014

    could it be the PCM or the ignition switch?

  • singingelvis
    singingelvis May 17, 2014

    haveing same with 97 k1500 turn on headlights got no low beam

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If you have replaced the switch, and it is still doing it it sounds like you definately have a short somewhere in your wiring. On the other hand if the dimmer is in the turn signal arm ( forward bright back dim ) the problem could also be there in the dimmer switch, such as a short being caused by that dimmer switch being faulty.Auto Zone and Discount Auto Parts both test a lot of your electrical problems for free, and/or may have some knowledge to more accurately pin point the problem. Not sure about Pep Boys or some of the other discount auto part chains.

Posted on Nov 18, 2008

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I have the same problem, but my timer/dimmer switch is on the left panle

Posted on Feb 16, 2013

  • philip klara Feb 16, 2013

    i have the same problem, but my timer/dimmer switch is on the left panle

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If you have daytime running lights but when you turn on your regular headlight on they do not come on. Take the bottom of your steering column off (Two Small Screws) and look at the back of your turn/dimmer switch make sure that the light blue wire is connected. The wires will break off after years of raising and lowering your steering column.

Posted on Dec 21, 2011

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