Door locks won't work manual or electric - Ford Mustang Forum
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post #1 of 11 (permalink) Old 11-03-2008 Thread Starter
TexasMustang's Avatar
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Door locks won't work manual or electric

Hi all, I recently bought a 1993 Mustang Convertible. When I bought it neither door would lock. With the key, by pushing the lock down, or with the lock button.

On the passenger side I took the door panel off and lubricated the lock mechanism and fiddled around with it to free it up. It now locks with the key or by pushing the lock down. But it does not lock with the electronic lock button.

On the drivers side it still will not lock at all. I've tried lubricating it and such same as the passenger side but I can not get the mechanism to move.

Any ideas to try.
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post #2 of 11 (permalink) Old 11-04-2008
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Sweet! I'm in the same boat (just purchased) with the same car! Window tracks are a little rough too. I'm thinking water may have got into the locking motor/switch/etc. and fried it. I'm gonna stick around and learn from the wiser.

'66 Mustang Coupe: V-code Emberglo, C-code 289, Pony interior, typical go-fast parts, T5, 3.80 gear
'93 LX 5.0 Vert: Soon to be 5.8 vert
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post #3 of 11 (permalink) Old 11-04-2008
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I'm gonna tear into this weekend even if no one replies. I'll let you know if I find something. It sounds like your cylinder may be the issue.

'66 Mustang Coupe: V-code Emberglo, C-code 289, Pony interior, typical go-fast parts, T5, 3.80 gear
'93 LX 5.0 Vert: Soon to be 5.8 vert
'00 F250: Its 8400 lbs, its loud and its fast

Expectations are premeditated disappointments
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post #4 of 11 (permalink) Old 11-04-2008
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The Door Lock Actuators on these cars don't hold up for all that long. My Electric Switch to lock and unlock the doors hasn't worked since I bought the car. But, I've never bothered with it.

You can unlock the locked doors from the inside by pulling the door handle, so... kind of never put in the effort to fix it!

It's either one of two things:

1) The Actuators: This is the most likely answer. They just go bad.

2) Wiring: Less likely, but a break in the wires or something not hooked up properly would cause this problem.

You can always check this by tearing apart the door jam and pressing the lock/unlock button and checking to see if Voltage is Running through the wires at the right time.

If it is... you know it's the actuator.

Unfortunately, I don't know the color configuration off the top of my head and a wiring diagram would be the only thing to answer that question.


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Died March 18, 2009

1986 Silver Mustang Convertible - Phoenix

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post #5 of 11 (permalink) Old 11-04-2008
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Did you try penetrating oil? There's some industrial strength stuff that works pretty well, just use a fair amount and let it work in for a few hours, then try moving the parts by hand.

You also didn't say if you hear any sound when actuating the locks electrically, it is possible that the solenoids burnt themselves out trying to move the frozen mechanism, which means you'll have to unfreeze the mechanical parts and replace the electrical ones.

If there is sound, it may be that you have to continue to work everything before the solenoids have enough power to overcome the resistance of the mechanicals that are still partially bound.
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post #6 of 11 (permalink) Old 11-04-2008
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if it is the actuators them self you can remove em easily and everything will work but you'll have manual locks which is what i did. if you are careful you can just remove the actuator and leave the white clip on the door. which i broke one. but hey atleast my doors lock

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post #7 of 11 (permalink) Old 11-04-2008
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I would think it's the actuators, more than anything.

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post #8 of 11 (permalink) Old 11-04-2008
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Yeah it's more than likely the actuators. I'm having the same problem with my '91. When I first got it, they worked a little and the owner told me the switch was bad. I've priced the actuators on ebay for around $20 each, but I can deal with unlocked doors for awhile...

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post #9 of 11 (permalink) Old 07-18-2009
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Car locks and window?

Hi, Guys,
I'm having a similar problem with my 97 Mustang GT. The window will not go down nor will the door unlock by pressing the unlock button on either side--only with the key. They both broke at once-when I got in the car in the morning they just didn't work. I don't hear any noise when I press on either the door or the window button. I know that I didn't leave the window down in the rain, so that's not it. I'm not familiar with the word "actuator" Is this something a fairly intelligent person can change? It's kind of sad to drive a convertible when the window won't go down - kinda defeats the purpose. But if this is something I can fix or is relatively inexpensive to fix that'll be good to hear.
Thanks in advance.
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hey fellows i have a 1991 gt and i cant even get the driver door open at all. its locked and the switch wont work the door handle wont open it and i have even tried to pull on the (the little fancy things that stick up out of the door panel? with all i got
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It's the actuators. Corroded up inside. Penetrating oil may get them to work, but it'll likely be short term. You can get both actuators as a pair on ebay for something like $30 bucks. I bought mine there a couple months ago. DON'T drill out the rivet when you replace the old ones!!! Waste of time, and it's just as easy to remove the actuators without messing with the rivet at all. When you pop off the door panel you'll see the actuators clip into a plastic holder. If you use a long screw driver you can pop one of the plastic clips off the actuator, then twist and pull down a little and the other one will come out. I takes a little effort, and thought, but in the end your better off doing the repair this way. While your in the door use some chain lube (aresol can of grease) and spray down all the linkage for your locks and windows.

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