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-   -   Central locking problems - Finally a solution! (http://www.focusfanatics.com/forum/showthread.php?t=133249)

exsodius 08-30-2007 06:49 PM

Central locking problems - Finally a solution! PICS added.
 
After 1 year with problems with locking my car, i found something. I have searched the net everywhere, but the only thing i found was this: "Ford Technical Service Bulletin (TSB) 05-10-21 says to clean any corrosion from the door latch connectors, then pack them full of dielectric grease."

But it did not work.

My problems with locking/ unlocking:

- Happends when weather is cold and/or moisty.
- Central locking don't work on drivers door either with a key or remote.
- I can open all doors with a key in passengers door.
- Sometimes I hear a click from the doors, after 5 minutes from coldstart.

My exploring lead to this solution:

- I unplugged the drivers door latch plug. All 3 other doors suddenly worked.
- Focus central locking works like this. Ther are 2 tiny wires controlling the locks. One is for lock and one for unlock. When one of these wires gets earthed it locks/ unlocks. But these wires never gets earthed at the SAME time.
- So i used my voltmeter a bit. WTF! Both wires were earted. A SHORT CIRCUIT in my drivers door latch. [ohcrap]
- So i wanted to have a little fun. I unplugged the latch plug in drivers door. Then i short circuit these two wires myself to simulate how the car would respond.
- The car responded exactly as described over, nothing worked. It even made this click sound when i took away the short circuit. Hurray!

What would you do if your wife told you to go left and right at the same time. Nothing right? Thats what happens when you give a signal to the car to lock/ unlock at the same time.

So now i have the biggest problem left. To either buy a new latch or to take it out of the door to clean it. The short circuit inside is probaly by water or dirt.

So now i am very HAPPY!

exsodius 09-01-2007 06:09 PM

3 Attachment(s)
Tonight i sat in my car ready to take out the central lock mechanisim when i noticed it was full of water. I was raining a lot. Looks like the water is going through the water strip at the bottom of the window. The window has a edge below where water i dripping from, and this edge is right over the central lock mechanism. It's dripping right at the electrical power plug for the central lock motor. Bummer FORD!!!

Is my waterstrip worn out? And is it easy to change it?

Is it normal with water inside the doors?

This explains my short circuit, because i only have problems when it rains.

Any help would be great.

Here are pictures. First picture is most important. Look how wet it gets. The one in the middle is taken from top where the window goes inside the door. In the right picture i have dried the central lock mechanism out with paper.

S0C0nFused 09-01-2007 08:39 PM

The window 'edge' is not a water tight seal. It is designed to encourage water to channel away. That being said. If you are getting a lot of water inside the door (and it looks like you are) then that is a problem only solved by having the strip replaced OR there is also the possibility that the window guides are worn so that the window is no longer snug against the strip. Does your window bind at all when your raise/lower it?

exsodius 09-01-2007 09:16 PM

Quote:

Originally Posted by S0C0nFused (Post 1738948)
The window 'edge' is not a water tight seal. It is designed to encourage water to channel away. That being said. If you are getting a lot of water inside the door (and it looks like you are) then that is a problem only solved by having the strip replaced OR there is also the possibility that the window guides are worn so that the window is no longer snug against the strip. Does your window bind at all when your raise/lower it?

It looks like the water strip is binding closely to the window. Exept for 1 inch at the rear part of window have a tiny clearance. But even where the strip looks tight, i can see water going trough it watching it from the inside.

It might be my fault because in the winter i am very lazy scraping ice of my windows. I push the window down button instead, using my weather strip as a ice remover [sleeping]. So maybe its this habbit that causes the strip wear down?

S0C0nFused 09-01-2007 09:52 PM

Quote:

Originally Posted by exsodius (Post 1739003)
It might be my fault because in the winter i am very lazy scraping ice of my windows. I push the window down button instead, using my weather strip as a ice remover [sleeping]. So maybe its this habbit that causes the strip wear down?

[nono] Yes, that would do it.

exsodius 10-03-2007 05:39 PM

1 Attachment(s)
Problem solved!

My central lock has worked fine for a month now. Even when its raining or are cold.

What i found after cleaning the lock mechanism was that it has a microswitch like in your PC mouse buttoms. In picture you see the black switch with the red dot on it. This red dot is a water proof rubber seal for the switch pin. This red seal made the switch pin hang when it was cold. In my case it was full of grease. I measured the switch with a multimeter. When pin is pushed inside the doors are locked, when the pin is out the doors are open. So what happend was that when unlocking the car the switch stayed closed. And the other doors sent a negative signal that was telling the driverdoor that they were unlocked. Then you had two negative signals making a short circuit. And then all doors stopped working. So i believe many focuses have this problem. And have probaly changed the whole unit with a new one. But that is expensive.....

Tip: Clean and spray microswitch with WD-40 if you have this problem.

Pingouin 09-23-2008 05:21 AM

Thanks exsodius! I've had the same problem for a while, looked everywhere for a solution, all of them failed (including fuse 63 check and spraying inside the locks in case they stuck), but now you give me new hope! Heck, I even tried the Russian fix by banging on the door!
Now I need to figure out how to get to the lock unit! [bawling]

Pingouin 09-23-2008 01:51 PM

OK, now I managed to remove the door panel and the dampening chunk of foam. I can see the lock mechanism alright, but can't figure out how to take it out! I got the 3 torx screw holding the lock itself to the door frame, but there seems to be more than that. Can anyone give me some explanations please?[wave]

Pingouin 09-25-2008 06:31 AM

Quote:

Originally Posted by Pingouin (Post 2358950)
I can see the lock mechanism alright, but can't figure out how to take it out! I got the 3 torx screw holding the lock itself to the door frame, but there seems to be more than that. Can anyone give me some explanations please?

Anyone can help me out please? I still didn't manage to take the lock assembly out, and my door panel is still in my leaving room! Any help would be greatly appreciated, I look forward to have my assembled door back while driving! [thumb]

sezetec 09-25-2008 06:59 AM

There are two metal rods or linkages that hook to the door handles. It can be pretty tricky twisting and turning them to manuever the lock motor/latch assembly out of the door interior. Just take your time and note where everything is hooked up! Be patient and good luck!


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