Question about 2004 Ford Mustang

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Gear shift interlock

I can crank my 2004 Mustang, but it won't shift out of Park.
In order to crank and drive it, I must turn the key on, shift to neutral, and then start the engine.

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  • amorxxxmuert Jun 20, 2008

    I have been having the same issue and its really frustrating! I have an '04 mustang that wont shift into gear when the car is on and my brake lights wont come on when this is going on. But when they did come on (I tried this last night after pulling a bunch of fuses) it didnt work...really annoying seeing as I need to go to work and stuff.

  • jasonbiba Sep 20, 2008

    Im Having the same problem in a 97 mustang v6

  • Silverblack218 Jun 22, 2013

    Im having the same here too, i replaced the switch and still nothing. checked fuses, Nothing. im thinking the cable inside the shifter snapped.

  • Anonymous Mar 24, 2014

    shift indicator will not light up park or neutral to start the engine

  • Anonymous Mar 26, 2014

    I put a new cluth in and it shifted fine fo about 120 miles then it would only go into second and forth and now it wont even turn over to start


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It's a brake booster switch, Ford cars are notorious for this problem. It's a switch on the brake pedal that detects when your brake pedal is pressed. It's cheap and easy to fix.

Posted on Jan 06, 2009

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Shoulda gotten a V8

Posted on Oct 14, 2008

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1 Answer

2003 Ford Mustang won't shift out of park

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This is really confusing. What is it you are trying to fix? You are going in different directions all at the same time, which I am guessing is part of your problem. Are you trying to fix? A "no-start" problem? a "no-crank" problem a "cannot get shift lever out of PARK" problem or a problem with not being able to turn the key???

What was the original problem? - WHY did you replace the ignition switch? Did you replace the "IGNITION SWITCH" or did you replace the "KEY AND TUMBLER" assembly?

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It sounds to me like you need to figure out what it is you want to fix before you jump in and go replacing any more parts. I do not mean to be offensive, but it really sounds like you are creating more problems than you are fixing at this point.

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check the fuses as if the brake light fuse is blown it won`t allow the shifter to move out of has a shift interlock system so the gear shift won`t accidentally be moved out of park by mistake.

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There is an interlock that requires the brake pedal to be depressed in order to shift the car into gear. So...first question (I have to ask!): Did you make sure to press the brake while trying to shift out of park? If so, theres a good chance that the brake switch is bad.

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did you check that you still have brake lights ?

Ford has the shift interlock, so if you loose brake lamps, the shifter will not move out of park.

Quick test, turn the key to the on position ( do not start ), and see if the gear shifter will move to neutral.

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Pull hard on the steering wheel to the left and the steering wheel lock mechanism should release. I mean pull hard to left because shift interlock is froze if you cannot get it this way you will need a pro to help! Good Luck Mate.

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