Trying to remove the key lock cylinder on a 1991 Ford F-350

If you mean the switch that the key cylinder operates, it should be near the floor on the steering column. You just disconnect the harness and remove two screws.
You have to remove the cover around the steering wheel and push a pin to remove the key lock. There are videos on YouTube to do that.

The steering wheel was turned when the key was removed. So when you try to turn on the key, turn the wheel one way and the other way to release the pressure on the key. The key should turn ok.
Hope this helps.

First remove the negative battery cable.
It has to be in the LOCK position...
remove the steering wheel.
on tilt wheel applications, remove the upper extension shroud by squeezing it at the top and bottom positions and popping it free of the retaining plate at the right.
remove the 2 trim shroud halves.
disconnect the ignition switch electrical connector.
drill out the break off head bolts connecting the switch to the lock cylinder housing by using a
1/8 in. drill, and remove both bolts.
disengage the ignition switch from the actuator pin.

Ignition Lock Cylinder REMOVAL & INSTALLATION Functional Lock The following procedure applies to vehicles that have functional lock cylinders. Such cylinders either have a key available or known key numbers from which a key can be made.

1. Disconnect the negative battery cable.
2. Turn the lock cylinder key to the RUN position.
3. Using a 1?8 in. (3mm) diameter wire pin or a small drift, depress the lock cylinder retaining pin through the access hole in the upper steering column shroud (under the ignition lock cylinder) while pulling out on the lock cylinder. Remove the lock cylinder from the column. Fig. 1: Using the key, turn the ignition lock cylinder to the RUN position, then depress the retaining pin using a wire pin or small drift
   To install:
   
4. Install the lock cylinder by turning it to the RUN position and depressing the retaining pin. Insert the lock cylinder into its housing. Make sure the cylinder is fully seated and aligned in the interlocking washer before turning the key to the OFF position. This will permit the cylinder retaining pin to extend into the cylinder housing.
5. Rotate the lock cylinder using the lock cylinder key, to ensure correct mechanical operation in all positions.
6. Connect the negative battery cable.

Non-Functional Lock The following procedure applies to vehicles in which the ignition lock is inoperative and the lock cylinder cannot be rotated due to a lost or broken key, unknown key number or a lock cylinder cap that has been damaged and/or broken to the extent that the lock cylinder cannot be rotated. 1986-90 VEHICLES

1. Disconnect the negative battery cable.
2. Remove the steering wheel. For details, please refer to the procedure located earlier in this section.
3. Remove the two trim shroud halves after removing the three attaching screws.
4. Disengage the electrical connector from the key warning switch.
5. Using a 1?8 in. (3mm) diameter drill, carefully drill out the retaining pin, being careful not to drill deeper than 1?2 in. (13mm).
6. Place a suitable chisel at the base of the ignition lock cylinder cap, then, using a suitable hammer, strike the chisel with sharp blows to break the cap away from the lock cylinder.
7. Using a 3?8 in. (10mm) diameter drill, carefully drill down the middle of the ignition key slot approximately 1 3?4 in. (44mm) until the lock cylinder breaks loose from its breakaway base. Remove the lock cylinder and drill shavings from the lock cylinder housing.
8. Remove the retainer, washer, ignition switch and actuator. Thoroughly clean all the drill shavings from the casting.
9. Inspect the lock cylinder housing for damage from the removal operation. To install:
   
10. Replace the lock cylinder housing if it was damaged.
11. Install the actuator and ignition switch.
12. Install the trim and electrical parts.
13. Install a new ignition lock cylinder.
14. Install the steering wheel. For details, please refer to the procedure located earlier in this section.
15. Connect the negative battery cable.
16. Check the lock cylinder operation.

1991-95 VEHICLES

1. Disconnect the negative battery cable.
2. Remove the steering wheel.
3. Using locking pliers, twist the cylinder cap until it separates from the lock cylinder.
4. Using a 3?8 in. (10mm) diameter drill bit, drill down the middle of the ignition lock key slot approximately 1 3?4 in. (44mm) until the lock cylinder releases from its breakaway base. Remove the lock cylinder and drill shavings from the lock cylinder housing.
5. Remove the retainer, washer, ignition switch and actuator. Thoroughly clean all drill shavings and other foreign materials from the casting.
6. Inspect the lock cylinder housing for damage from the removal operation. If the housing is damaged, it must be replaced. To install:
   
7. Replace the lock cylinder housing, if damaged.
8. Install the actuator and ignition switch.
9. Install the trim and electrical parts.
10. Install the ignition lock cylinder.
11. Install the steering wheel.
12. Connect the negative battery cable, then check the lock cylinder operation.

You'll need to remove the steering wheel with a steering wheel puller. There should be a button to push in to remove the lock cylinder, I can't remember if you have to have the key in to get the button to release.

You don't without ruining it. I suggest you get a locksmith to make you a new key they can get in there somehow and make a key. In 1988 did Ford use a seperate key for doors? If the doors are the same or the glove box those locks are easier to remove. Also, I've never tried this with a Ford but on newer GM cars if you take the title to a dealer they can make a key from the (VIN) serial number. But, you have to have the title to prove ownership of the vehicle. I don't know if they can do that on an 88 or not. Good luck.

take off the black plastic cover around the key switch,about 4 screws,and just under the switch is a tiny hole,turn the key to ACC then push a paper clip in the hole and wiggle the switch and it will come out,if you lost the key then its cheaper and easier to have a lock smith pull the lock out,about $100.00

HI, follow the steps below to help with this issue.



Step 1

Disconnect the negative battery cable from the terminal on the battery. Remove the upper and lower steering column covers by unscrewing or unclipping them.

Step 2

Remove the steering wheel by lifting off the center cover, disconnecting the horn wire and removing the retaining nut and washer. Make a mark on the steering wheel spline and the wheel itself so you can line it back up precisely. Pull the steering wheel straight back to remove from the shaft.

Step 3

Take off windshield wiper and turn signal switches by pulling them off as you did the steering wheel and disconnect the wiring. Slide the spacer sleeve off of the steering column.

Step 4

Unscrew the ignition switch mounting screws. Pull out the ignition switch. Disconnect the wiring connector from back of the ignition switch. Simply loosen the tabs and pull it out.

Step 5

Insert your key into the ignition. Turn the ignition switch to the locked position. Depress the retaining pin with a small screwdriver and turn the key to the Off position to free the cylinder. Once it is free, turn the key to lock position and remove the key and key cylinder.

Step 6

Install your old key cylinder into the new ignition switch assembly. Make sure the contacts in the cylinder and assembly line up. Reattach wiring to ignition switch, slide it into place, screw in mounting screws and reassemble steering wheel and switches.

This (plate) is held in place with a snap ring.You will need a special press to remove it and also a steering wheel puller to access the ignition lock cylinder.The actual switch is located on top of the steering column above the brake pedal. It is actuated with a rod from the ignition lock cylinder.

Let's hope with a Supercab you have a tilt steering wheel.If so, just unhook the negative battery cable, line your wheels up straight, leave it in park, and turn the key on. On the underside of the housing the key and lock cylinder is in, above the hazard switch, is a very small hole with a locking pin inside. Using a small punch, or whatever works for you, simply push the pin in as you pull the lock cylinder out, sort of twisting and rotating the cylinder as you pull. A non-tilting column is a little harder, but it's not difficult, just take your time and think about what you're doing. First you need to remove the steering wheel, so make sure you mark the wheel and column in a couple places so it's easy to line up later. On the back side of the wheel are two screws that hold the front padding with the horn in it. Remove it, being careful of the wires, and disconnect. With cruise control, when you disconnect the wiring in there, you need to squeeze the ground wire terminal clip carefully but firmly (it's sort of like a "J" clip), and pull the wire out of the hole in the wheel. DON'T just pull it out, squeeze, it's spring loaded. Then remove the switch for the horn and the nut holding the wheel on. Use a puller on the steering wheel, but not one they call a "knock off", because it's pretty easy to screw things up if you go hammerin' on the wheel or the column shaft. Take your time. Then you'll find the little hole with the retaining pin near the base of the lock cylinder inside the column, remove it the same way. Remember, in park with key on. Hope this helps you out. If you happen to be referring to the actual "ignition switch", located inside the steering column (which most people don't even know actually exists), or you don't have the key and that's why you're doing this, you'll have to let me know, and I'll try to walk you through those procedures at a later date.