6mil928

On my 81 I'm having problems with the central lock system. I can't keep the driverside door locked even if I lock the passengerside with the key. The passenger side doesn't make a sound or move ever and is very hard to lock with the key. It finally does lock by rotating the key and pushing the lock indicator on the top of the door panel at the same time(very Hard). The passenger side will stay locked it doesn't make a sound or appear to even try to lock or unlock. The driverside will not stay locked when I try to lock the car with the key. The only way I can keep the DS door locked is by pulling the fuse and then locking it with the key at night. I currently have both door panels off to fix this problem and install new speakers. Do these door lock actuators go out regularly? Any suggestions on how to trouble shoot this? Does the central door lock system interact with the door pins that turn the courtesy lights on? My DS door pin is missing. Has anyone removed this sytem and added PO electric locks? Please help I'm tired of pulling the fuse and I need to get these panels back on. Thanks, Jason

PS: (Sometimes I think the DS door locks automatically when I'm driving. I never lock it but notice it unlock when I turn the car off. It doesn't do it everytime though.)

Lizard928

sounds to me like they are out of adjustment.

Podguy

Here is a link to an explanation on door locks.

http://www.kondratyev.com/porsche/te...tric_-_80+.htm

Hope this helps.

Dan the Pod Guy

Roger

I had the same problem on my 82. The passenger lock was very difficult to turn with the key. Everytime I would lock the driver's door, the passenger side would lock slightly but then unlock causing the driver's side to unlock. While I was inside, I actually forced the lock down and got locked in the car.

Well, I took apart both door assemblies last sunday and I noticed that the passenger's side locking assembly (the mechanical portion...not the key assembly) had some binding. I can't figure out how this could have happen, but a dremel with a cutting wheel solved the problem.

My suggestion would be take apart the passenger's assembly (inside the door...not the door lock) and check if there's any binding. The most difficult thing to do is taking off the anti theft plate. You'll need to remove 2 screws and loosen a 13mm bolt. Make sure you disconnect the battery.

Good luck...

Regards,
Roger
87s4
82 competetion package (project)

6mil928

Thanks guys! Great tips! I'll get on it this coming weekend. Jason

6mil928

Do you guys happen to know if these pin switches play a roll in the central locking system? Thanks, Jason

Podguy

Pin switches?

There are a couple of things to watch for. One - the motor for the locks has a position conductor to tell the motor when to stop. I have seen these get burned out. The only fix is a new motor.

The door locks are cross wired. If one will not lock becuase the door is open then the other resets to the unlock position. The same occurs if one of the locks is not adjusted properly.

The electric door locks look like an add on. I guess Porsche planned on going with the vacuum locks until customers complained. Instead of modifying the fuse panel for the door locks Porsche added two separate fuses in fuse holders and attached them to clips at the top of the panel. Sometimes you have to go searching for the fuses because they fall down behind the panel. If one fuse is blown the door locks will never cycle right. They can even get into a never ending loop of opening and closing.

Good luck

Dan the Pod Guy

6mil928

Ok guys I adjusted my passenger side lock actuator and the locks are working now. Well kind of. What I've got now is the passenger side mirrors the driver side. If driver side is locked the passenger side locks. If the driver side is unlocked the passenger side unlocks. I'm not sure where to go from here. It is acceptable now because I can lock the car but only from the driver side. I currently have the door panels off and would like to reinstall them soon. I'm searching the forums now for help in dealing with this but if anyone has any good advice in what to look for or how to fix this I'd sure welcome any advice given. Jason

6mil928

I think I found the central locking unit behind the center console. It looks like a black relay larger than a standard relay. Is that correct? Also has anyone ever tapped in to the these wires at the relay to interact with the central locking system? I thought I might use the alarm lock and unlock signals to actuate the doors from there. Anyone ever done this or have any thoughts on doing this. Jason

Podguy

Jason.

If the locks do not operate from the passenger's side then the most common cause is a bad fuse. There are two fuses in fuse holders attached to clips on the top of the fuse panel. You might have to go looking as sometimes they are tucked down behind the panel.

One fuse for each motor. However since the sense switches on the top of the motors are cross wired both doors can lock without both fuses being good.

Looks like you have located the central locking controller. I beleive the green and blue wires are the ones that activate the locks. They do this by being switched to ground. You can get at these also on the console central locking button.

If you want to hook up a remote this is where you tap in. Pretty easy imstallation.

Good luck

Dan the Pod Guy

6mil928

Dan thanks for the response. The first thing I did after posting on here was check the fuses. Both are good and ohm check good. After reading your response I wonder if I'm getting power to both motors. I can swap the wires at the fuses and the controlling door becomes the passenger side instead of the driver side door. Not sure what that means as far as the problem goes.

Now as far as the remote lock and unlock goes let me make sure I understand correctly. If I ground the green or blue wires the doors will lock and unlock? If I set it up this way do I need to pull the central lock controller? I also do not have a central lock button. Should I have one in a 81 MY. Thanks for the help. Jason

Alan

Well your door locks are working correctly now - thats what they are supposed to do. The only thing left appears to be the switch operated by the key on the passenger side doesn't trigger the driver side. For an 81 there is no controller... that was on later cars with a different system. Your locks are just connected together with 2 wires. Each lock also gets a supply from the fuse and a ground. If both sides move together you have ground and both lock interconnections what you are missing is power to the passsenger lock key switch. (These fuses actually don't feed each motor they go to the switches - some folks are confused) Since swapping the fuse connections changes the behaviour side to side the wiring from the fuse to both doors is good. (good!)

So actually good news - the issue is the fuse, the fuseholder or the wiring up to the fuse... check to see if you have constant 12v feeding both fuseholders or clean the fuseholder contacts.

Alan

6mil928

Thanks Alan. I do have power through both fuse holders but I haven't checked it at the motors. Do you know which wire should have power at the motor? Is it constant 12v or is it switched. I was just thinking by switching the supply and the working motor changes sides wouldn't that mean that the supply to both sides is working? Not sure this system is so confusing. I'm so tempted to disconnect the system and install plain old actuators. Jason

Alan

For what you say here...? it pretty must mean that one of these supplies doesn't work and the other one does...? Are you sure that what you said is true?

Check these outputs with a multimeter. Try connecting the fuse outputs together do both doors work?

These fused lines feed a switch at each lock controlled by the key in that lock. For left this is Red/White for right its red/black.

These switches are what command the other sides operation - no power no remote lock operation...

The other wires to each motor should be ground (brown) and the 2 wires that go to the other lock - Yellow & Green/Black

To your earlier question the door pin switches have no interaction with the locks - lighting only

Alan

6mil928

Thanks Alan for the great info. I agree with what you say but I'm telling the truth about the fuses. I think it's a great idea to wire them together. I'll let you know what happens. Jason