TEST AND REPAIR
If the key removal effort is excessive on a vehicle with a automatic transmission first adjust the shift linkage, (Refer to GEARSHIFT CABLE ).
If the ignition switch effort is excessive remove the ignition key cylinder from the steering column. (Refer to REMOVAL ). Check the turning effort of the key cylinder. If the ignition key cylinder effort is excessive replace the key cylinder. If the ignition key cylinder operates properly look for the following conditions.
ELECTRICAL DIAGNOSIS
For ignition switch electrical schematics, refer to SYSTEM WIRING DIAGRAMS .
MECHANICAL DIAGNOSIS (KEY DIFFICULT TO ROTATE)
Vehicles equipped with an automatic transmission and a steering column mounted shifter: an interlock device is located within the steering column. This interlock device is used to lock the transmission shifter in the PARK position when the key cylinder is in any position and the brake pedal is not depressed.
Vehicles equipped with a manual transmission and a floor mounted shifter: on certain models, a lever is located on the steering column behind the ignition key cylinder. The lever must be manually operated to allow rotation of the ignition key cylinder to any position. If it is difficult to rotate the key to any position, the lever mechanism may be defective. This mechanism is not serviceable. If repair is necessary, the steering column assembly must be replaced. (Refer to REMOVAL ).
Scheme 3
Scheme 4
Scheme 5
- Disconnect negative cable from battery.
- Remove the lower shroud (2) from steering column.
- Place shifter in PARK position. The ignition key (2) must be in the key cylinder (1) for cylinder removal.
- A retaining pin is located at side of key cylinder assembly. Rotate key (2) to RUN position. Press in on retaining pin with a small punch (3), while pulling key cylinder (1) from ignition switch.
- Remove the key (2) and key cylinder (1) from the column (3).