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Thread: Door lock went "click" when turning key...and its now inop

  1. #1
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    Door lock went "click" when turning key...and its now inop

    Driving the new-to-me 35th the past couple weeks. All good, but this morning when I went to use the key to open the door, the key turned, I heard a subtle "click" and the door lock didn't open. It was a subtle click, but definitely sounds like something gave out and broke. Any clues? I've used the keyless entry pad to unlock the door, but would like to sort out the issue. It doesn't help that it's been cold as bawls, even with ice, so maybe some plastic piece became brittle and gave out.

    I was planning on bringing out the shop manual later, but always interested in any suggestions from the group.

    Thanks!
    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

  2. #2
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    Dec 2007
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    Most common is the small white plastic keeper clip on the rod from the lock cylinder to the lock rod (?).

    Good news it they should be readily available at your local parts store, they get brittle like most parts using the same material on our cars after all these years - bad news is you'll need to pull the door panel, glass up, to access. Kind of a puzzle as I recall, not a lot of access, but you'll get it.

    75451 is it, I think:
    https://www.autozone.com/collision-b...underbird/2002
    Last edited by KMT; 01-09-2018 at 12:50 PM.

  3. #3
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    Quote Originally Posted by KMT View Post
    Most common is the small white plastic keeper clip on the rod from the lock cylinder to the lock rod (?).

    Good news it they should be readily available at your local parts store, they get brittle like most parts using the same material on our cars after all these years - bad news is you'll need to pull the door panel, glass up, to access. Kind of a puzzle as I recall, not a lot of access, but you'll get it.

    75451 is it, I think:
    https://www.autozone.com/collision-b...underbird/2002
    That's what I'm hoping it will be, a clip. I had a clip go in my olg titanium 89, but it was a differnet one (door handle wouldn't work). I keep forgetting there are several of those back there. Still yet to peek at the shop manual diagrams to confirm which one I need.

    Thanks for the input my friend!
    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

  4. #4
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    Quote Originally Posted by KMT View Post
    Most common is the small white plastic keeper clip on the rod from the lock cylinder to the lock rod (?).

    Good news it they should be readily available at your local parts store, they get brittle like most parts using the same material on our cars after all these years - bad news is you'll need to pull the door panel, glass up, to access. Kind of a puzzle as I recall, not a lot of access, but you'll get it.

    75451 is it, I think:
    https://www.autozone.com/collision-b...underbird/2002
    Hey Ken,

    I just checked my 89 & 95 shop manuals and I could have sworn there was a diagram showing the clips for all those door lock rods. Am I missing it?

    Not that I'm doubting you, but I wanted to double check the diagram to see what other clips are round there. I was going to consider getting the other clips too, just in case.

    I have 75451 on order. I will be tackling this on the 35th this week.
    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

  5. #5
    Join Date
    Dec 2007
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    My '90 shop manual is most likely same as yours... section 44-16-1.

    44-16-3 shows the lock cylinder and rod(s), but no clips or bushings and no details on those rods at the cylinder or of the cylinder.

    All the references at the latch 14-16-3 View B are 'bushing'...don't see 'clip'. P/N 385666-S, shown three times on the latch assembly 21812 - The clip I'm thinking of is actually a bushing with a keeper, tho, so...

    Might be my recall failed, sorry and/or I was working on a different rod/clip, maybe the lock rod or the rod at the handle.

    These should be our door lock cylinders - you can see the clips (definitely not what I had in mind before) at the lock cylinder in the images:
    https://www.ebay.com/itm/OEM-DL62B-N...RZHb3K&vxp=mtr
    Last edited by KMT; 01-23-2018 at 01:00 AM.

  6. #6
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    Quote Originally Posted by KMT View Post
    My '90 shop manual is most likely same as yours... section 44-16-1.

    44-16-3 shows the lock cylinder and rod(s), but no clips or bushings and no details on those rods at the cylinder or of the cylinder.

    All the references at the latch 14-16-3 View B are 'bushing'...don't see 'clip'. P/N 385666-S, shown three times on the latch assembly 21812 - The clip I'm thinking of is actually a bushing with a keeper, tho, so...

    Might be my recall failed, sorry and/or I was working on a different rod/clip, maybe the lock rod or the rod at the handle.

    These should be our door lock cylinders - you can see the clips (definitely not what I had in mind before) at the lock cylinder in the images:
    https://www.ebay.com/itm/OEM-DL62B-N...RZHb3K&vxp=mtr
    Gotcha, I was trying to prep for the job but I think i'll just remove the panel and inspect to see what broke.

    Thanks for the input Ken.
    Current: 1993 SC 5.0L Auto Red, 1994 SC 5-speed Teal, 1995 SC 5-speed Chameleon Blue
    Old: 89 SC auto Twilight Blue, 89 SC stick Titanium, 90 35th stick, 92 Sport 5.0L stick, 94 SC stick Black, 1994 SC Auto Teal
    Also: 1992 Feature Mustang Convertible 5-speed Vibrant Red, 1991 BMW 850i 6-speed Red, 1994 BMW 850CSi 6-speed Red

    www.mamn12.com for your mid-atlantic mn12 needs!

  7. #7
    Join Date
    Jan 2018
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    10
    Quote Originally Posted by CaifanSC View Post
    Driving the new-to-me 35th the past couple weeks. All good, but this morning when I went to use the key to open the door, the key turned, I heard a subtle "click" and the door lock didn't open. It was a subtle click, but definitely sounds like something gave out and broke. Any clues? I've used the keyless entry pad to unlock the door, but would like to sort out the issue. It doesn't help that it's been cold as bawls, even with ice, so maybe some plastic piece became brittle and gave out.

    I was planning on bringing out the shop manual later, but always interested in any suggestions from the group.

    Thanks!
    Something was broken inside, it's not normal to hear a click sound and the door lock didn't open. You have to check inside.

  8. #8
    Join Date
    Apr 2002
    Location
    Greenville, IN
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    4,404
    Yeah, it has to be either the plastic clip attached to the lock tumbler or the one attached to the door latch mechanism. The little kit in KMT's AZ link has both pieces.

    I have at the lock cylinder rod just pop out of the lower plastic clip before. Just had to pop it back in and rock-on. The plastic should be in good shape if it hasn't been tampered with before though.....that original stuff has always been pliable on the numerous MN12's I've messed with.
    Matt Haub
    Shootouts: '09 SS 1st | '10 Mod1 2nd | '11 Bracket 3rd | '12 Bracket 1st | 2013 | '14 Bracket 3rd | 2015 | '16 Bracket 1st & Mod2 2nd | 2017 |
    Black '89 5spd - 281K miles, MPx, E85, Alky-Inj RWHP: ? RWTQ: ? Best 1/4mi:12.521, MPH:107.23mph
    35th Anniversary Auto 46k miles | Red '93 Auto 186k miles
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