Question about 1999 Chevrolet Express

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WHEN I HAVE THE RUNNING LIGHTS ON AND APPLY THE BRAKE I LOSE THE LEFT BRAKE LIGHT. IF I DON'T HAVE THE RUNNING LIGHTS ON AND APPLY THE BRAKE THEY BOTH WORK FINE

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  • jlarsen58 Oct 28, 2008

    Can the bad ground be traced to it's exact location?

  • rnts Dec 13, 2008

    Same problem--is this common?

  • guebunch007 Dec 13, 2008

    When head lights are on, I loose both brake lights on 2002 Chevrolet Express 2500. When head lights are off, brake lights work fine. What is causing this problem?

  • dcelayaa Dec 16, 2008

    I have the same problem. :(
    (Equinox 2006, made in canada)

  • yadayada
    yadayada May 11, 2010

    You need to test the multifunction switch

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Check the ground wire in the socket. Have someone press on the brake, while you push/pull on the black wire...it could go from dim to bright. Bright is good, tape it down in the bright position, or replace the socket.

Posted on May 28, 2009

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  • 69 Answers

You have a bad ground causing back feed when lights are on

Posted on Oct 06, 2008

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Rr.ABS and the brake lights on


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When i hook up a trailer the running lights wont work but the turn and brake lights work,sometimes the brake lights will stay on after i apply the brakes and i have to tap the brake pedal to make them go...


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Kristie, I don't know if you ever found a solution to this, but I have been having the same problem. I even took it to get repaired and they fixed it saying it was a relay. I think now that they just replaced the brake switch as well. Then, a few months after that, the left light went out. I have checked fuses, replaced bulbs and the brake switch. There is not much more to the system besides the wiring from the front to the back. I then decided to lodge the brake pedal so the brake lights were on, took the assembly out and twisted the light holder as if to take it out, then twisted it back and presto, the brake light came on! So I deduce there is a flaw in the design of the brake light assembly and that the contacts lose their connection the to contact ring of something of this nature. It only seems to affect the rake light, not the turn signals or running lights. Odd.Only time will tell how long this will last.
If you get this, or anyone else see's this, I hope it helps.
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