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Home >> Cadillac >> 2004 >> DeVille Base >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Steering Wheel And Steering Column >> Diagnostic Information and Procedures >> Lock System Does Not Lock
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Lock System Does Not Lock

Lock System Does Not Lock

Step Action Yes No
DEFINITION: The lock system will not allow the key to be turned to the OFF lock position.
1 Did you review the Steering Wheel and Column System Description? Go to Step 2  Go to Steering Wheel and Column Description and Operation 
2 Verify that the lock system does not lock.
Does the lock system operate normally?
System OK Go to Step 3 
3 Inspect for an incorrect, worn, or damaged key.
Is the key incorrect, worn, or damaged?
Go to Step 9  Go to Step 4 
4 Inspect for a faulty lock cylinder or release button.
Is the lock cylinder or release button damaged?
Go to Step 10  Go to Step 5 
5 Inspect the shift cable adjustment.
Is the shift cable adjusted incorrectly?
Go to Step 11  Go to Step 6 
6 Inspect the automatic transmission (A/T) shift control for damage.
Is the A/T shift control damaged?
Go to Step 12  Go to Step 7 
7 Inspect the ignition switch for damage.
Is the ignition switch damaged?
Go to Step 13  Go to Step 8 
8 Inspect the steering wheel theft deterrent lock for damage.
Is the lock damaged?
Go to Step 14  Go to Step 3 
9 Replace the key. Refer to Key and Lock Cylinder Coding in General Information.
Did you complete the repair?
Go to Step 15  -
10 Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement .
Did you complete the repair?
Go to Step 15  -
11 Adjust the shift cable. Refer to Automatic Transmission Range Selector Cable Adjustment in Automatic Transaxle-4T80-E.
Did you complete the repair?
Go to Step 15  -
12 Replace the A/T shift control. Refer to Shift Control Replacement in Automatic Transaxle-4T80-E.
Did you complete the repair?
Go to Step 15  -
13 Replace the ignition switch. Refer to Ignition Switch Replacement .
Did you complete the repair?
Go to Step 15  -
14 Replace the steering wheel theft deterrent lock. Refer to Steering Wheel Theft Deterrent Lock Replacement .
Did you complete the repair?
Go to Step 15  -
15 Operate the system in order to verify the repair.
Did you correct the condition?
System OK Go to Step 3