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Truck starts but transmission will not shift out of park. Brake is suppose to unlock transmission but doesnt. Brake light are working

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Brake light switch has more than one function try changing it

Posted on Jul 25, 2009


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Where is module on brake peddle for shifting out of park on cadilac srx4 2007

There is no module on the brake pedal . There is a brake switch , do the brake lights work ? If the brake lights work switch is ok .
Automatic Transmission Shift Lock Control Description and Operation
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
• The automatic transmission shift lock solenoid (serviced as the automatic transmission shift lock actuator), as well as the body control module (BCM) and the engine control module (ECM). The shift lock solenoid is located within the floor shift control assembly with vehicles equipped with floor shift.
• The body control module (BCM) controls the voltage supply circuit of the shift lock control solenoid. The following conditions must be before the BCM will supply voltage to the shift lock control solenoid.
The BCM controls the voltage to the shift lock control solenoid through the shift lock control solenoid controlled voltage circuit. The following conditions must be met before the BCM will supply voltage to the shift lock solenoid:
• The ignition is in the ON position.
• The engine control module (ECM) sends an input via GMLAN serial data to the BCM indicating the transmission is in the PARK position.
• The BCM determines the brake pedal is applied according the brake pedal position.
Since the shift lock control solenoid is permanently grounded, the BCM supplies voltage to the automatic transmission shift lock control solenoid, mechanically unlocking the shift lever allowing the driver to move the shift lever out of the PARK position as the solenoid energizes. When the brake pedal is not applied, the BCM turns the control voltage output of the shift lock control solenoid OFF, de-energizing the shift lock control solenoid. The de-energized solenoid mechanically locks the shift lever in the PARK position.
During remote start operation, the BCM will de-energize the shift lock control circuit, locking the shift lever in the PARK position.

Your best bet ,have it towed to a qualified repair shop !

Oct 15, 2016 | 2007 Cadillac SRX

1 Answer

My 1999 Ford Windstar won't shift out of Park after I start the engine. If I just turn the key part way and don't start the engine, I can shift into neutral and start and drive. So it's not the...

The first thing to check is that you have working brake lights. If they are not working then the solenoid that pulls the park pin back to unlock the shifter is not going to get power from the brake light circuit.

Aug 19, 2016 | 1999 Ford Windstar

2 Answers

Why won't 98 Buick century shift into any gear?

is it a linkage issue? if the shift lever is working and you can feel the detents, check your fluid make sure it is full and clean, if not you could have internal issues with the trans

Oct 30, 2015 | Buick Cars & Trucks

1 Answer

Dodge 2500 shifter stuck in park wont shift

check make sure brake lights working if not check brake fuse if fuse good you have a faulty brake light switch which allows when you press on brake pedal the brake transmission shift interlock solenoid will allow shift transmission in to out of park.also check brake transmission shift interlock solenoid fuse and transmission neutral safety switch.

Oct 06, 2013 | Cars & Trucks

1 Answer

Cannot move the shift lever from the PARK position


Your shift-lock actuator works off of your brake lamp circuits. Check your brake lamps. If your brake lamps are not working, then there is a very good chance that fixing your brake lamps will fix your shifter.

To work around this so you can move the vehicle, turn the key just far enough to unlock the steering wheel, but not far enough to make all the dash lights come on. You should then be able to shift the transmission to NEUTRAL and start the engine. Everything will work ok with your shifter until you put it back in PARK.

Dec 29, 2011 | 1997 Ford Crown Victoria

3 Answers


replace the shift lock solenoid next to the shift cable inside the vehicle
A GM dealer item only I am afraid to tell you

Jun 26, 2011 | Chevrolet 2500 Cars & Trucks

2 Answers

My subaru wont go out of park sometimes. What can I do?


May 04, 2011 | 1993 Subaru Impreza

2 Answers

2000 Alero Won't Shift out of Park

Make sure your brake light switch is working,2nd there is a BTSI solenoid (brake transmission shift interlock) that could be bad.

Aug 25, 2009 | 2000 Oldsmobile Alero

3 Answers

It's very hard to shift(lever?) my 96 prizm out of park.

the lever is hard to move foot on brake, right>?
on hill?
there are 2 things that prevent the lever from moving out of park
1: park lockout feature
2: parking pawl in trans jammed by persons parking on a hill incorrectly, (not setting hand brake first) this jams the internal Pawl, lock.
if the bypass lever below works, then its not the transmission locking. its the feature 1 doing that.

are you parked on hill ? or on the flat
are your tires/wheels jammed against a curb?
if on the flat and tires not against some object.
then the car is free to roll, and that means the parking pawl
is not jammed, (normal not parked correctly , hand brake first on, last off) per opr. manual.

called park lock out.
this is a feature that prevents car moving , starting the engine up.
the first thing that must work are rear brake lights.
you step on the brake, the lamps glow and the park solenoid unlocks freeing up the shift lever.
the corolla is its, in geo snake skins.

here is the circuit, after fixya badly shrinks it.
login to Mitchells see it your self.

did you scan the PCM first to see if the shift'er inputs are not showing DTC errors. ?
the logic has 3 input , progressives.
brake on, and the 2 shift'er switches most read correctly before
the shift solenoid , unlocks, left red arrow below.
X is the ECU. the ECU is the Logic, rule maker here.
if on flat ground we can find true cause
if you HAVE A voltmeter,
or replace the brake fuse. if blown.
the brake lamps on rear of car must not fail.
bad fuse brakes its its cracked, or loose. or rusty
bad brake switch. same deal park locking device
will not disable any time brake lamps fail.
i have the drawing if you need it.
a 96 Toy corolla is same car. same wiring
ask... have it all.


Jul 23, 2009 | 1996 Geo Prizm

3 Answers

Can't shift out of park

Im assuming that the lights and the window were working before shift issue. If so check the fuses first.
It may be a coincidence, In a quiet area you should here a soft click sound, around the shift lever area. If not, try unplugging the brake switch behind the brake pedal, There should be 2, 1 for the rear brake lights the other for the shifter lock-out. If you unplug it you should be able to shift. If unplugging it causes it to shift then you will need to replace the switch.

Apr 26, 2009 | 1999 Ford Expedition

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