Ignition actuator broke, truck will not turn off

1990 FORD F-150
140,000 MILES
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SARAHENGINEER
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  • 3 POSTS
The ignition actuator on our truck broke. However, the symptom of this problem has had an opposite effect on our vehicle, it will not turn off. We have to disconnect the starter switch to stop the vehicle.

We have opened out the steering column from the steering wheel and see the broken ignition actuator piece. Many have suggested that you can cut the small box at the end of this piece to install the new one without tearing down the whole steering column.

I want to make sure that this small box does not have an important function.

Does anyone have a blowout diagram of how the end of the ignition actuator "arm" interacts with other parts of the steering column? Or have some insight as to the true functionality of the box structure at the end of the ignition actuator? Please note that "arm" is not referencing the rod that hooks into the ignition switch, but the arm that extends out of the curved piece of the ignition actuator, into the steering column. See picture.

Thank you.

Sarah
Jan 18, 2019 at 3:13 PM
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JACOBANDNICKOLAS
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Hi and thanks for using 2CarPros.

If the actuator broke, that is why you can't turn it off. The actuator rod runs between the tumbler/lock and the actual ignition switch. I believe the black box you refer to is the ignition switch itself.

I have attached three pictures of the steering column and components. I added all three possible designs based on if this is a manual, automatic, column shift.

Let me know if this helps.

Joe
Jan 19, 2019 at 12:55 PM
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SARAHENGINEER
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Joe, the box on the end of the ignition actuator (seen in the attached picture of my post dated 01/18/19) is not the ignition switch. The ignition actuator is part of a mechanical assembly that actuates the ignition switch lower down into the steering column. The actuator rod is in contact with ignition actuator and the ignition switch, but it is unclear to me what the function of the "arm" on the ignition actuator (which is separate from the actuator rod and ignition switch) actually is. Do you have any insight? Thank you.
Jan 22, 2019 at 3:59 PM
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JACOBANDNICKOLAS
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The only other thing in there that I can think of is the shift lock solenoid. Can you take a picture of the component you referring to and upload it?

I attached two pictures. The first is an exploded view of the steering column for an automatic column shift. If you have something different, let me know. The second picture identifies the components.

Let me know if this helps.
Jan 22, 2019 at 5:39 PM