Ignition Switch/Lock Cylinder/Steering Column?

Tiny
RAYWAI
  • MEMBER
  • 1995 MERCURY COUGAR
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 151,000 MILES
Hello! Looking for some help with my car.

Was driving totally normal. Yesterday I pulled into a parking lot and went to turn the car off. Removed the key from the lock cylinder in the off position and the car was still running. Everything with the transmission is still good so I was able to put the car in park, remove fuse 9 (I think) under the hood to the IGN switch, and turn off the engine. The panel still runs electrically after this, so I just cut power from the battery to fully shut off the vehicle.

Besides not being able to turn the vehicle off, the other big symptom I have is that the IGN lock cylinder turns very loosely with the key inserted and doesn’t typically click into the Off, ACC, or Run positions. I am able to start the car back up with the key in the Start position (and after reconnecting the battery), but then am unable again to turn the car off using the key and have to go through the steps above. Once the car is started, the key can be turned to any position other than Start and can be removed from the Off position and nothing will happen. The key cannot be removed in any position other than Off. The car will turn over an already running engine if turned to Start, as expected.

I have tried replacing the lock cylinder, but the new cylinder functions the same as the old one. It appears it is simply a means to turn the shaft the moves in and out of the steering column as a result of turning the key in the lock cylinder, and the new lock cylinder does not give that taptic feedback into the Off, ACC, or Run positions either. My next thought was to try replacing the ignition switch itself to solve the electrical problem, but I’m not sure that that addresses the mechanical problem of the key not clicking into OFF, ACC and RUN positions which makes me think the IGN switch is not the problem..?

Any help is super mega appreciated. Happy to provide clarifying comments. This is my daily driver so hoping to get back up and functional here soon. Thanks!
Sunday, August 6th, 2023 AT 7:26 AM

10 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Based on the description, it does sound like the switch itself has failed. I understand that it still can start and run the engine, but that doesn't mean it isn't faulty.

If you look below, I attached the directions for replacing the switch. I would recommend removing and inspecting it to see if there is an issue between the lock cylinder and switch or if the switch itself is worn.

Let me know what you find.

Joe

See pics below.
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Sunday, August 6th, 2023 AT 11:46 PM
Tiny
RAYWAI
  • MEMBER
  • 15 POSTS
Hey Joe, thanks for the message. Was able to get the ignition switch removed and it is clear that the problem lies between the lock cylinder and the ign switch. The small plastic rod that connects the two has clearly snapped in the middle. Is this part no. 3e715 and do you have any additional information as to how to replace it? It looks like a significantly larger amount of disassembly may be required to get to that piece.
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Monday, August 7th, 2023 AT 2:16 PM
Tiny
RAYWAI
  • MEMBER
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Looks like there are lower and upper parts for 3e715. I was able to source the upper part from a local AutoZone, this piece has a pin on the end that connects to the lower rod actuator. It is at this connection where I suspect the failure is. When turning the key from RUN towards the off position, the lower rod does not retract while the upper rod does.

This is the upper rod that I was able to source:
https://www.autozone.com/batteries-starting-and-charging/ignition-switch/p/dorman-ignition-switch-47510/399732_0_0

I can’t find much info on the lower rod, based on a quick search it looks like servicing this might require removing the whole steering column? These two plastic rods look fairly well encapsulated and enclosed in the metal column. . .
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Monday, August 7th, 2023 AT 3:01 PM
Tiny
RAYWAI
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I will also add that now on top of replacing the lock cylinder, I have also replaced the ignition switch as preventative maintenance.
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Monday, August 7th, 2023 AT 3:02 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

I checked out the link you sent. Dorman provides good parts, so I'm glad you found it. As far as the lower section, have you had any luck finding one? You may want to remove things before buying things to make sure you get what is needed.

Let lock cylinder was a good idea as well.

Let me know.

Joe
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Tuesday, August 8th, 2023 AT 8:07 PM
Tiny
RAYWAI
  • MEMBER
  • 15 POSTS
I have not found the lower section yet. I am trying to source the parts that I think are the issue before doing any major disassembly. I do not have a garage and plan to do this in my shop bay at work over the weekend. This creates a timing issue as well due to the fact that I cannot leave my vehicle disassembled in the bay come Monday. I will have limited ability to a functional second vehicle to take trips to the auto/parts store. The ideal situation would be to get as many potential faulty parts as possible, proceed with the disassembly, and find that I have purchased more parts than necessary to complete the job.
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Wednesday, August 9th, 2023 AT 4:39 AM
Tiny
RAYWAI
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Do you have any additional instructions or guide as to how to service this part? Even instructions on the Dorman 47510 part I linked above would be helpful.
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Wednesday, August 9th, 2023 AT 5:21 AM
Tiny
JACOBANDNICKOLAS
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Hi,

Unfortunately, they don't have directions specific to that part. However, I attached the directions for disassembling the steering column. Take a look through them and let me know if they help.

Take care,

Joe
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Wednesday, August 9th, 2023 AT 9:19 PM
Tiny
RAYWAI
  • MEMBER
  • 15 POSTS
I was able to get it fixed, it was in fact the lock lever actuator. Thank you for the help and diagrams!
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Tuesday, August 22nd, 2023 AT 9:24 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Hi,

Thanks for the update. I'm glad you got it taken care of. Looking at the pic, that thing looks well used. LOL

Regardless, feel free to come back anytime in the future. You are always welcome here.

Take care,

Joe
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Tuesday, August 22nd, 2023 AT 7:01 PM

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