Please not that these instructions are for a '91 Ranger. If I recall corredtly, the proceedure is the same for an '89 Ranger.
REMOVAL:
1. Disconnect battery ground cable. Remove steering wheel. Remove tilt lever, if you have a tilt column. Remove upper and lower shrouds.
2. Locate the small hole on the casting that retains the lock cylinder. Punch the lock cylinder retaining pin with a small diameter ***** punch (1/8" or smaller). Using a 1/8" drill, drill out the retaining pin, going no deeper than 1/2".
NOTE: Take care to not damage the cast housing while drilling.
3. Place a chisel at the base of the ignition lock cylinder cap, and using a hammer, strike the chisel with sharp blows to break cap away from the lock cylinder.
4. Use a 3/8" dia. drill and drill down the middle of the ignition key slot about 1-3/4" until the lock cylinder breaks loose from the steering column cover casting. Remove the lock cylinder and drill shavings from the base of the of the cover cast housing.
5. Remove the drive gear, bearing retainer and actuator from the casting. Clean components with a cleaning solution. Check all components, including the casting, for damage from the drilling. If there is damage, the part must be replaced. Use compressed air to remove any drill shavings or foreign particles.
INSTALLATION:
1. Reinstall the drive gear, bearing and retainer. Lubricate with grease before installing.
2. Lubricate the lock cylinder with grease.
3. Turn lock cylinder to the ON position and depress the retaining pin.
4. Insert lock cylinder into its housing in the flange casting, making sure that the tab at the end of the cylinder aligns with the slot in the ignition lock drive gear.
5. Turn the key to the OFF position. This will permit the cylinder retaining pin extends into the cylinder casting housing hole.
6. Using the ignition key, rotate the lock cylinder to insure correct mechanical operation in all positions.
7. Connect key warning plug.
8. Reverse the INSTALL step 1 proceedure.
9. You should be good to go. Hope this works for you.