Question about 1993 Mercury Grand Marquis

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Car only goes into gear when i press on brake pedal

Why does car only go into gear when i press on brake pedal

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This is normal It is a safety feature forced upon the automotive industry by lawyers.

Posted on Apr 23, 2014

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Posted on Jan 02, 2017

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SOURCE: brake pedal has alot of

The air seeping is a dead giveaway. Your power brakes are now manual brakes, but stiffer. The diaphram in the brake booster has torn and the hissing noise is the engine vacuum escaping (you hear it louder when you depress the pedal right?). Replace the booster and you will be fine. The brake lights probably don't work because you can't push the pedal down far enought to release the switch. Please rate. Thanks.

Posted on Sep 03, 2011

Testimonial: "I am grateful for your help.I was told so by a mechanic that it was brake booster diaphram or abs pump.pedal has so much pressure and hissing."

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My nissan pulsar 2000 automatic.gear lever sticks in park.


Hi Jenn. All vehicles have a shifter interlocker system , it's a safety feature that won't allow the shifter to be put into gear ,unless the drivers foot is pressing the brake pedal . Do your brake lights work ? This is just a general idea on how it works , because all car makes don't do it the same ! On the brake pedal under the dash is a switch an when you press the brake pedal it allows power to go to a solenoid unlocking the shifter ,allowing the driver to put the vehicle into gear ! You would need to find a wiring diagram so you could check voltage at the brake switch , into an out of the brake switch with the pedal pushed ! Then find the lock out solenoid an see if power is being applied to it ! Hope this helps

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CHECK BRAKE PEDAL SWITCH.PERFORM A BRAKE FLUID CHANGE.CHECK SERVO BRAKE FOR LEAKS{U MIGHT HEAR A HISS WHEN U ORESS PEDAL}LET ME KNOW.!!.

Mar 22, 2014 | 2003 Audi A6

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I have a 99 gmc jimmy Ive notice while i slow down for a turn my car is still trying to accelerate and only when I come to a full stop it goes back to normal Also when first starting the car it revs up to...


Vacuum leak from brake booster. If you hear a sucking noise when you press the brake pedal replace it. Another way to check it is to place truck in gear set e-brake press brake pedal repeatedly and see if idle goes up and down. DO NOT PRESS GAS PEDAL DURING TEST.

Feb 01, 2014 | Cars & Trucks

1 Answer

Car won't go into gear


Check your Brake pedal switch. Some makers use a lockout controlled by a safety switch on the brake pedal circuit. Most will prevent the starter from cranking unless the brake pedal is pressed, but it could be made to prevent the gearshift from moving if the Brake pedal is not pressed. You are probably missing a signal from this switch. When you list a problem try to include the Make and model of the vehicle you drive.

Dec 06, 2012 | Cars & Trucks

1 Answer

I can't get my Aztek Gear Shift button to press in. It is stuck in park. I have tried turning the key and it will turn but the button won't budge.


most likely it is ur brake pedal switch, it just behind the brake pedal arm, this switch must be triped by pushing the brake in order to shift into gear, if switch goes bad u cant shift. best of luck

Nov 05, 2012 | 2003 Pontiac Aztek

1 Answer

Cant change gear from park to drive


its a safety switch located either on the brake pedal support or the safety release located in the steering column.
you press the brake pedal and the switch sends power to the release, that allows you to shift the gear selector out of park.


Jan 28, 2010 | 2004 Ford Explorer

1 Answer

EMERGENCY BRAKE PEDAL GOES DOWN TO THE FLOOR WHEN ENGAGED


sounds like you have a worn set of park break shoes. they are located inside /behind the read rotors. if you remove the rotor and the shoes look fine then you can adjust them with the little star gear located on the bottom of the brake shoes.

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1 Answer

Warning light on the dashboard


As far as the red light goes. You simply have a brake light bulb out.

The clicking is normal. Its the shift lock solenoid. When you press on the brake it lets you shift into gear.

Feb 20, 2009 | 1994 Nissan 300ZX

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