Jeep Repair: ignition lock cylinder, jeep cherokee classic, negative battery cable

Question
need to know how to replace the ignition cylinder on my 98 Jeep cherokee classic. the key would not turn and steering wheel is locked so this is where they said to start by replacing cylinder. Thank You

Answer
IGNITION SWITCH AND KEY CYLINDER
The ignition key must be in the key cylinder for cylinder removal. The key cylinder must be removed first before removing ignition switch.

KEY CYLINDER REMOVAL
Disconnect negative battery cable at battery.
If equipped with an automatic transmission, place shifter in PARK position.
Rotate key to ON position.
A release tang is located on bottom of key cylinder Key Cylinder Release Tang
Position a small screwdriver or pin punch into tang access hole on bottom of steering column lower cover Key Cylinder and Cover Removal
Push the pin punch up while pulling key cylinder from steering column