Question about 2007 Ford F-450 Lariat
Check you aux hydurlic pump, ford will have one pump for the powersteering and one on the right hand side for the brake
Posted on Jul 27, 2009
If the vehicle is equipped with a separate hydro boost pump, it could be going bad. If the pump isn't supplying the proper pressure to the hydro booster then the electric motor will continue to run. there is also a relay beneath the hydro boost/master cylinder assembly that could be sticking. The motor is there to supply braking assist pressure when the engine powered pump is not running.
Posted on Nov 02, 2008
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Posted on Jan 02, 2017
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NOTE: Your vehicle is equipped with a
brake-shift interlock feature. This
feature prevents you from shifting
from P (Park) unless you have the
brake pedal depressed. (The ignition
must be in the ON position.) If you
cannot shift from P (Park) with the
brake pedal depressed:
1. Apply the parking brake.
2. Remove the key.
3. Insert the key and rotate one position
clockwise (ignition in the OFF position).
4. Apply the brake pedal and shift to N
(Neutral). (If the vehicle is shifted to P
(Park), you must repeat the previous steps.)
5. Start the vehicle.
If you need to shift out of P (Park) by using the
alternate procedure described above, it is
possible that a fuse has blown and that your
brakelamps may also not be functional.
DO NOT DRIVE YOUR VEHICLE UNTIL
YOU VERIFY THAT THE BRAKELAMPS
check fuse 13 based on the attached diagram.
If this fuse is bad replace it. If it is not bad, blows again, or continues to be stuck in park then you need a new brake interlock switch that can be found on the brake pedal up underneath the dash.
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