Question about 2005 Ford Focus

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Ford Focus ZX5 - Rear brake lights stay on when car is running and in gear

My ZX5 has developed a problem with the rear lights. I discovered that all my center bulbs were burned out and the housing is somewhat melted as if the lights were on for a very long time. Replacing them has no effect as it seems there is no power leading up to the unit at all.

That's when I discovered the bigger problem: When the engine is running/On and car is in PARK, nothing seems amiss. The brake lights (the ones not burned out) function normally. Step on the brake pedal and the lights come on. However, when the car is in Drive, Reverse, Neutral, or anything other than PARK, the brake lights are continually on without stepping on the pedal. Only use of the turn signal interrupts them. Any ideas? Thanks - TomR 2002 Focus SE Wagon. Exact same problem as TRocky describes, except third brake lights don't smell burnt. Problem was noticed Aug 8, same day as TRocky's posting. I'll add that flashers on have the same effect as turn signals.

I've tried replacing the Brake pedal/gearshift interlock switch with no change in outcome.

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  • Goffard Oct 17, 2008

    I also have the same problem, any idea what wire might be shorting??

  • focusfreak50 Nov 09, 2008

    I have the same issue with a 2002 zx5, just wondering if you were installing aftermarket lighting when the issue first occured

  • Anonymous Mar 17, 2014

    When transmission in park, brake lights work great except high brake light doesn't come on. When transmission moved from park both lower brake lights come on and stay on till put in park again.

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Hi, you have suffered a major electrical short here, and the car is telling you via the light signals that you need to take care of this in a garage. The original short burnt cables, which is why there is visible signs of melting, smell etc. I know it will involve a cost, but consider the value of your life if the car was to go on fire with you or your family in it? Another short will cause such a fire, get to a garage soon!

Posted on Aug 10, 2008

  • doublez Dec 08, 2010

    ITS THE GEM MODULE....IT IS IN THE RIGHT SIDE PILLAR. JUST FIXED THE ISSUE.

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