Question about 2003 Chevrolet Silverado 1500

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My left rear brake light is out. However the turn

My left rear brake light is out. However the turn signal works fine and no fuses are blown. What next?

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  • gnoah007 Feb 03, 2010

    Neither fusable link in the bulb is burnt out. I change the bulb and still the same problem

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  • Chevrolet Master
  • 2,002 Answers

Check the bulb. There are 2 elements in there and one is probably burnt off. Just change the bulb. Hope this helps.

Posted on Feb 03, 2010

  • cy schousboe Feb 05, 2010

    You are going to have to use a test light to check further. If you don't have one, you can pick a decent one at any auto parts store for $15-$20. They come in handy for a lot of things. The clip end always goes to ground. Find a spot near the tail light assembly where you can bare off a spot to attach the test light, it needs a good ground, so bare off a small spot with a file or sandpaper and attach the clip. Remove the bulb and turn on the turn signal. Use the test light on the terminals to find one that flashes. Use something to block the brake pedal so it stays on and test the other terminal. If it lights then you need to replace the socket because it is not making proper contact. If it doesn't then push the point of the test kight into the wire behind the socket. If it lights there, replace the socket.If it doesn't light either place then go under the truck on the driver's side and follow the wire harness from that side back toward the front of the truck. There will be a connection point close to the back. It might be 2 plugs but more likely it will go to a box on the rear crossmember. Check the wire for the brake light at that point. Whether it's a connection or a box your problem is most likely to be there. Pull the light harness off and you will probably find corrosion that needs to be cleaned off to shiny metal. Check both sides of the connection and both sides of the connector. Connectors can look good on one end but be bad in the plastic housing where you can't see it or the wire could be broken off inside it.

    If the wire harness just plugs into another connector then you can cut it and splice the two wires together. If you do this then get some "heat shrink tube" at the auto parts store to seal the splice before you tape it up. I'm not sure if you can splice around the box set-up but if you can find the same color wire on the other side of the box you could try. Hope this helps.

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