Question about 1999 Ford Expedition

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Left rear brake light stopped working but bulb and fuses are OK.

Dashboard warning system indicates brake light failure.
Left rear brake light does not work when brake pedal depressed.
Bulb checked and definitely not "burnt out". Fuses checked and definitely not "burnt out". (All 5 amp fuses checked and OK)
Car is 1999 A4 Saloon.
Any ideas?

left rear tail light is out. but the park light still works.

Posted by on

  • 5 more comments 
  • paulwall Feb 05, 2009

    yes i agree. but ive replaced both bulbs and the left continues to not come on when i press the brakes. ive even replaced the socket.

  • paulwall Feb 05, 2009

    i will try this method. ill get back to ya after i finish. thanks

  • paulwall Feb 08, 2009

    i tried the relay method and they were all good..the brake light still doesnt work. and the turn signal indicator still blinks fast like the bulb is blowed. ive checked every single fuse inside and under the hood. is it something else that i can try or do

  • paulwall Feb 08, 2009

    ill try that thanks

  • Anonymous Mar 19, 2014

    Checked bulbs and fuses they are good. The clicking noise comes from the drive console when brakes are depressed and car is in park

  • Anonymous Mar 22, 2014

    brake lights are working in the rear left side

  • Anonymous Mar 31, 2014

    3rd brake light not working. system check say all lights OK!
    How can I fix it?



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These are Dual Function Bulbs. They control the Parking Lights and the Brake Lights. This Bulb is Burnt out on the Brake Coil inside the Bulb. I have actually seen Bulbs that were Bad But you could not Tell by jast looking at them. It should be fine with a New Bulb. Please Rate My Response! Thanks!

Posted on Feb 05, 2009

  • 2 more comments 
  • Travis Humphries
    Travis Humphries Feb 05, 2009

    The next step would be to Trace the Wire. Get a Voltometer and Check the Lead Wires that go to the Socket and Make Sure that there is Power going to that Side. If Not, You might Replace the Brake or Illumination Relay (not sure of the Labeling on this Model) They should be Located in a Fuse Relay Box either in the Trunk or Under the Hood.

  • Travis Humphries
    Travis Humphries Feb 05, 2009

    No Problem!

  • Travis Humphries
    Travis Humphries Feb 08, 2009

    It will Probably be an Electrical Short then. The Easiest way to Locate this Short would be to Get a Diagnostics Ran on the Electrical System from a Mechanic to Narrow it down.

  • Travis Humphries
    Travis Humphries Feb 08, 2009

    No Problem!



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