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C3 - '72 Auto Key Won't Turn from Off-Lock

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Old Mar 11, 2025 | 10:00 PM
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Default C3 - '72 Auto Key Won't Turn from Off-Lock

Hey guys -

I've been stuck for a couple months trying to get the key to turn from the Off-Lock position. Car is a '72 350 Auto. With the Driver's door open, the buzzer will sound when I insert the key, but I cannot rotate they key from the Off-Lock position.

Notes:
- The steering column lever under the brake master cylinder is in the 1 o'clock position (previous owner already disconnected the cable and tied the lever up with a piece of wire, see photo).
- Car is in Park (have attempted shifting to other gears, no change).
- I have rocked the car forward/backward to attempt to alleviate any binding that may be causing the key to not turn.
- I have attempted to use the two similar keys that I suspect are the door/ignition keys (both insert fully into ignition) with no change in outcome.


Any ideas?
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Old Mar 12, 2025 | 10:15 AM
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Ignition switch tumbler doesn't rotate to all positions malfunction



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Old Mar 12, 2025 | 10:44 AM
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Try moving the steering wheel left & right while applying gentle pressure to turn the key.
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Old Mar 12, 2025 | 11:18 AM
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Has the key you are using worked at any time in the past?
Is the key you are using square headed and stamped with the letter C?
72 Ignition Key
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Old Mar 13, 2025 | 11:30 AM
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Thanks Sunflower! I had reviewed that thread already and haven't found anything that specifically describes this issue aside from something possibly being broken inside the steering column. Hoping that it could be something else before I need to go down that path.

Hammerhead - Thanks! I have been attempting to shift it side to side and also in different positions of the tilt/telescope with no success.

Mel - The previous owner has passed but per his widow this wasn't an issue she was aware of. Key I'm using matches the link you sent.
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Old Mar 13, 2025 | 12:26 PM
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Originally Posted by Ultyhuck13
Thanks Sunflower! I had reviewed that thread already and haven't found anything that specifically describes this issue aside from something possibly being broken inside the steering column. Hoping that it could be something else before I need to go down that path.

Hammerhead - Thanks! I have been attempting to shift it side to side and also in different positions of the tilt/telescope with no success.

Mel - The previous owner has passed but per his widow this wasn't an issue she was aware of. Key I'm using matches the link you sent.
Did the key work when you purchased the car?
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Old Mar 13, 2025 | 12:58 PM
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I had to replace my ignition key cylinder because it wouldn't turn. My key wouldn't insert fully, about 1/8 inch short. I suspect that the insides of it fell apart.
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Old Mar 13, 2025 | 01:17 PM
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I suspect it's the ignition switch actuator rack and sector.



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Old Mar 13, 2025 | 01:17 PM
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Originally Posted by MelWff
Did the key work when you purchased the car?
No, it hasn't ever worked in my ownership.
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Old Mar 13, 2025 | 01:18 PM
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Originally Posted by bruiser
I had to replace my ignition key cylinder because it wouldn't turn. My key wouldn't insert fully, about 1/8 inch short. I suspect that the insides of it fell apart.
Thanks for the info! I'll take a closer look and verify my key is fully seated. I assumed it was fully seated since the buzzer was successfully triggering, but I'll take a look when I'm home tonight.
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Old Mar 13, 2025 | 01:20 PM
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Originally Posted by sunflower 1972
I suspect it's the ignition switch actuator rack and sector.


Thanks Sunflower! How do you recommend I go about troubleshooting/investigating/confirming that's my issue?
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Old Mar 13, 2025 | 01:26 PM
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Originally Posted by Ultyhuck13
Thanks Sunflower! How do you recommend I go about troubleshooting/investigating/confirming that's my issue?
Get yourself a shop manual (if you don't already have one) and take it apart. That's about the only way that I know of.
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Old Mar 13, 2025 | 01:28 PM
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Originally Posted by sunflower 1972
Get yourself a shop manual (if you don't already have one) and take it apart. That's about the only way that I know of.
I do have one already thankfully! Appreciate it!
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Old Mar 13, 2025 | 01:57 PM
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Originally Posted by Ultyhuck13
I do have one already thankfully! Appreciate it!
Please be sure to update us on what you find. Good luck!
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Old Mar 13, 2025 | 01:59 PM
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Originally Posted by sunflower 1972
Please be sure to update us on what you find. Good luck!
I plan to! Hoping to document it well for others if they also run into it.
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Old Mar 13, 2025 | 05:16 PM
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Ultyhuck13, here's a video that will give an idea about taking the column apart:
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