Question about Ford Sierra
I would agree with you on the moisture part, it can cause Electronics to do some crazy things. After you let it dry out check the fuses because sometimes the relays are controlled by fuses and if one is blown then the relay naturally will not work and it would more than likely fail closed. This would explain the locks engaging on their own as the relay to lock it is engaged and when you unlock it it over rides the lock relay for the moment but then it locks again. A lot of features on vehicles that have been sitting up will start to work on their own once the vehicle is put back in use. If not and not a fuse I would try to find a schematic and find where the door lock relays are located and check them. They could be anywhere, I would look on the fire wall outside and on the inner fender and also under the dash. I had a 93 Cad. and they were located on the left side of the trunk. I hope this helps and hope it straightens itself out once it dries out. If I can be of any further assistance please feel free to contact me.
Col. Dana Gillespie
Posted on Mar 24, 2014
One of the switches is bad or stuck on lock position.push the switch to unlock position and slowly relies.listen for click from inside . next step disconnect passenger switch(speaker problem)if problem solved replace(aftermarket available)or driver side the same
Posted on Mar 24, 2014
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Posted on Jan 02, 2017
I had exactly the same problem and there are 2 ways of solving it. The first is to pay your Audi Service Centre £350-£550 to replace it for you and the second way is to do it yourself which will cost well under £100 (depending on ebay). Firstly check the Central Locking Pump to make sure the hoses haven't come off. This is located in the very back right hand corner of the boot so you will need to remove the carpet and internal trim and you will see a block of sponge. Carefully lift the top off this and you will see the pump sat inside it.
Actually there is a great set of photos online to help you and I will add the link for you at the end. If the hoses are still connected and not leaking it is very likely that the internal compressor wheel has shattered (quite a common fault). I believe it is possible to open the pump and replace this wheel (in fact there is one for sale on a very popular auction site at the moment) but my own preference was to simply buy a whole new pump and replace that (£16.00 + £8 p+p off the same auction site).
The most important thing for you to remember is that when you look to buy a replacement pump you need to find one with the EXACT same serial number. The one in the diagram shown is
8LO 862 257 N but I have a sneaky feeling yours might end in an A.
Anyway, I hope this is of some help and dont worry about the connections as both air connectors and all 3 electrical ones are different sizes and will only fit in one place each.
Posted on Aug 19, 2008
No, likely to be caused by the actuators in the lock mechanism failing usually causing the door to remain locked. The boor door can also fail this way, as do the front side doors. Replacement requires the whole lock unit to be replaced at a cost of roughly £60 a lock, and a hours work. Helps if you have small hands. Requires a full strip down of the door and you will need the lock unit, trim clips (a few quid) and a trim removal tool (tenner). You can bodge with a flat head screwdriver, but the tool does help prevent damage to the clips & trim panel.
Posted on Feb 22, 2010
Method 1: Press lock or unlock button 4 times in succession. Method 2: Switch ignition ON and OFF. Within 10 seconds press lock and unlock button in succession.
This is the only manual reset
If this does not work go to your local auto electrician
The probable fault could be central locking activator passenger door
Posted on Jul 15, 2010
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