2003 ford focus replaced brake switch lights will work in park but when i engage revs neut drive brake lights stay ?????

Neutral safety switch can cause similar occurrences

check brake light switch for clearance,or interferance

Here is the Ford diagrams that you could to check(click for zoom)...













If it only lights up the tail lights when its in RND21 but works correct in park then I believe your looking at a internal shorted brake shift interlock on the shifter back feeding and sending power back to the brake switch and turning the lights on. I would access the shifter assembly and depin the wire I am pointing to and reconnect the connector and see if the brake light issue stops. You will need to manually shift it out of park or temporarily attach this wire to get it out of park for the test.






Check it and send us your comments.

I'm assuming you're talking about an automatic transmission. When you press on the brake pedal, you engage a switch under the pedal which turns your brake lights on, and also engages a solenoid in the shifter which allows you to shift the car out of Park.

That said, are your brake lights working? If your brake lights come on when you press the brake pedal, chances are the shifter solenoid/actuator is broken. If your brake lights DO NOT come on when you press the brake pedal, chances are you have a faulty brake light switch.

Regardless which part is to blame, these are pretty simple and inexpensive repairs.

Good luck, and if this helped, please rate my answer!

DO YOU HAVE YOUR FOOT ONTHE BRAKE ??????

when he replaced the mod vale did he make sure the pin was steal in place in the trany ?????

Sounds like you need to replace or adjust the brake light switch on the brake pedel mount.

Without the brake lights working the shift interlock can't release. Turn the key just off the "locked" position and you should be able to shift to neutral and start the engine then shift to drive or reverse. Just don't shift back into park until you are parking the car to leave it.

Check the lights on the 3rd brake light. If the bulbs are out the brake lights will remain on when in gear, but work properly when in park. I had the same problem had to go to Napa to get bulbs (5) and now all is fine.

if the shifter is still firm in its location, the neutral safety switch is located on the left side of the transmission. you can loosen it and relalign it to read the correct gear.