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1993 300GE Door Lock issue
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Posted 1/19/2020 1:41 PM
roverso
Member


Date registered: Jun 2009
Location: Central Oregon
Vehicle(s): 1993 JDM 300GE
Posts: 9

1993 300GE Door Lock issue

1993 JDM Mercedes G wagon that is RHD. The drivers door (RH front door) key will only lock all doors and not unlock them all. I thought the actuator was bad so replaced that with a new one but still have the same issue. The passenger side front door (LH front door) both locks and unlocks all doors. Any ideas on how to fix this? Thanks in advance.
#241431
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Author
Posted 1/19/2020 3:05 PM
J.R.
Elite Veteran




Date registered: Apr 2006
Location: Southern Maryland
Vehicle(s): 00 G500, 09 911 4S, 11 Cayenne S, 86 280GE (sold)
Posts: 828
500
Re: 1993 300GE Door Lock issue

My GUESS is that your model also has a door lock relay. http://www.pointedthree.com/disc/forums/showthread.asp?tid=13139&st...
#241432 - in reply to #241431
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Author
Posted 1/29/2020 7:19 PM
roverso
Member


Date registered: Jun 2009
Location: Central Oregon
Vehicle(s): 1993 JDM 300GE
Posts: 9

Re: 1993 300GE Door Lock issue

So I have replaced both the drivers side (RHD) actuator and the Kiekert door controller witch resulted in the same situation as listed above. With RHD vehicles are there additional relays involved to actuate the locks? This truck is a RHD JDM truck with keyed locks on both front doors and the rear door. I have another JDM truck that is LHD and it is only keyed in the drivers door and back door.
#241468 - in reply to #241431
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Author
Posted 1/30/2020 10:08 PM
Inkblotz
Expert




Date registered: Apr 2006
Location: Georgia
Vehicle(s): 90 300GD "Thundering Turtle II", w/ 603A turbo
Posts: 3184
2000
Re: 1993 300GE Door Lock issue

Does you back door lock all doors as well? My 1990 does.
The actuators at the front doors and rear door have additional wiring to be able to lock all doors. Perhaps the plug in connector in the door that the actuator connects to is faulty. It is exposed to some weather being in the door so there could be some corrosion or the wire has come loose in the plug housing.
If you have a LWB 5 door the actuators in the rear doors have fewer wires in the plug connector.

Edited by Inkblotz 1/30/2020 10:15 PM
#241473 - in reply to #241431
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Author
Posted 1/30/2020 10:39 PM
roverso
Member


Date registered: Jun 2009
Location: Central Oregon
Vehicle(s): 1993 JDM 300GE
Posts: 9

Re: 1993 300GE Door Lock issue

Inkblotz - 1/30/2020 7:08 PM

Does you back door lock all doors as well? My 1990 does.
The actuators at the front doors and rear door have additional wiring to be able to lock all doors. Perhaps the plug in connector in the door that the actuator connects to is faulty. It is exposed to some weather being in the door so there could be some corrosion or the wire has come loose in the plug housing.
If you have a LWB 5 door the actuators in the rear doors have fewer wires in the plug connector.



Yes the back door locks and unlocks all doors. I have checked the plug and wiring in the door and nothing jumps out. The drivers door (RHD) will only lock all doors, it doe NOT unlock the rest of the doors. The passenger side (LHD) and rear door both lock and unlock all doors including the driver. So somewhere the signal from the drivers door to unlock is not reaching the controller I guess. I was just wondering if there were additional relays involved as I replaced the main controller already.
#241474 - in reply to #241473
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Posted 1/30/2020 10:53 PM
Inkblotz
Expert




Date registered: Apr 2006
Location: Georgia
Vehicle(s): 90 300GD "Thundering Turtle II", w/ 603A turbo
Posts: 3184
2000
Re: 1993 300GE Door Lock issue

Other than the Kiekert relay I don't think so. Yours never had the infrared sensor thing did it? If you can figure out which of the wires is the unlock wire then trace it from the door to the relay you may get lucky. The plastic covering of the wire could be worn and grounding out. Maybe where it jumps from the door to the body.


Edited by Inkblotz 1/30/2020 10:58 PM
#241475 - in reply to #241431
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Posted 2/5/2020 1:31 PM
gerryvz
Extreme Veteran




Date registered: Apr 2014
Location: Annapolis, MD
Vehicle(s): 1994 G320, 1989 560SEC, 1994 E500 (W124)
Posts: 336
300
Re: 1993 300GE Door Lock issue

If you've replaced the Kiekert relay, and the door actuators (primarily the driver's "master" actuator) are known good, then the only other thing it could be is the connection with the actuator at the door lock cylinder. This makes mechanical contact and triggers the actuator when you turn the key. Evidently when you turn the key to lock the doors, it is not making contact.  Also, I do not believe that a 1993 truck (with the M103 engine) will not have the IRCL system with the key fob. My 1995 truck (made in late 1994) was the first generation of the trucks that had the IRCL system with the key fob. The only relay in the system is the Kiekert relay. The IRCL trucks with infrared key fob have a separate relay/control unit, but this 1993 truck should not have this if no IRCL system is present. Cheers, Gerry

Edited by gerryvz 2/5/2020 1:36 PM
#241482 - in reply to #241431
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Posted 7/29/2022 5:31 AM
Sean Webber
New user


Date registered: Jul 2022
Location:
Vehicle(s):
Posts: 2

Re: 1993 300GE Door Lock issue

The best advice is to call a locksmith and see what's wrong with your lock. All these guessings to find the root of the problem are so meaningless. Locksmith w12 can shortly detect and get rid of the problem in a professional manner. You can make things go worst with all experiments and advice from other people. Think about this and don't destroy your locks completely.

Edited by Sean Webber 7/29/2022 5:33 AM
#243707 - in reply to #241482
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