My parking brake is coming on and off. but my parking brake is not on. could this be a wiring problem, the fuses seem to be fine

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You may have brake sensors at each wheel. if one is dirty, it will do that.

Here you go watch this youtube video ! CHRYSLER PACIFICA STUCK IN PARK

check for a bad brake light fuse! if not the fuse, the brake light switch operates brake lights and if bad you will not be able to shift it out of park, as well as the brake lights not coming on.! because you have to put foot on brake to do so. if bad switch, it wont let it out of park. it could be just out of adjustment also!! good-day !

blown fuse possible check fuses

the mechanic should check on the loose connection wires ,then check the fuses.and the brake light bulb. and the park light bulb.You have said that the other lights are ok then it must be the loose wires or the bulb.but still check on the fuses for to be sure .

Check the brake light switch located under the dash, connected at the junction where the master cylinder rod connects to the brake pedal. Remove the connector and with a short piece of wire, paper clip works fine, insert into the two terminals on the connector. Check to see if your brake lights are on. If they are, your switch is bad.

It sounds like the shifter lock out solenoid has gone bad.It is a solenoid that releases the shifter when you push the brake pedal.

You have a blown brake lamp fuse.
Start the vehicle, depress the brake, and have someone observe to see if you have brake lights. No brake lights = no removal from park W/O pushing the over-ride switch.
FYI: Brake lamp fuse failures are most always created by a faulty trailer wire harness.

If the brake light switch doesn't work then the solenoid that allows you to move the gear selector out of park is locked out, it is a safety feature required by law, jump the brake light switch with a paper clip ( verify the brake lights are on) and see if you can get it out of park, I am sure it will now come out, then either replace the brake light switch or the wiring to it, many times the wires to the connector of the brake light switch brake inside the plastic insulation, so the outside looks good but the connection is not there or comes and goes, I suspect this is the problem with your car. The solenoid I mentioned is on top of the steering column.