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Ford Focus ZX5 - Rear beake lights always stay on

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 longer any 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 signals and emergency flasher interrupts them.

In addition, the cruise control has stopped working. I also have a 2004 Focus ZX3, so I swapped both of the brake pedal switches, but nothing changed. There must be a control module somewhere that is both turning the brake lights on and wrongly telling the cruise control that the brakes are being applied, but I do not know where it is. All fuses have been checked. Any ideas?

Thanks - TomR

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  • Anonymous Apr 25, 2009

    Brake lights on when in drive and cruise control does not work

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flapjack937
  • 129 Answers

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

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

  • 1 Answer

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

You are the MAN, Just like you said TRocky, there was a short in the center brake light wiring. Found the short in the rubber boot that connects from the lift gate to the car. Inside that rubber boot the wires were cracked and some were shorting.Repaired the wiring and everything is back to normal.

Posted on Nov 03, 2008

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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!

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