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Author Topic: Central Locking issues  (Read 3278 times)

Offline supernube

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Central Locking issues
« on: June 04, 2018, 06:32:46 PM »
Hello all.

I recently had electric window problems ...cured with advice from the forum ..broken wires in three of the five doors...soldered and repaired...thank you.

However ...having done that I now have no central locking from the key. I can lock all doors from the drivers door...thats working ..but nothing at all from the fob.

The battery is very week...have had to jump it twice today probably due to the ignition being on and off whilst fixing the doors etc...another problem I STILL have is the Faulty Alternator / vibration issues...which I havent got round to yet.

I have looked under the passenger seat and all looks fine to me...and have checked the number 27 (I think of the top of my head) fuse and thats ok....but thats as far as I have got....

I sat in the car and tried the fob right by the fuse area...and all round...nothing...and the light flashes on the key.

Also while fixing the doors the red light on the bottom of the door suddenly stopped working...no doubt cos I didnt disconnect the battery...dont know....but it was working ...then stopped as I checked the rear door wires.
?

Any advice will be very much appreciated.

Thank you
Daniel

Online johnnyroper

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Re: Central Locking issues
« Reply #1 on: June 04, 2018, 07:07:19 PM »
I would re visit the door wiring as you have either caused another to break while in there repairing or pushed back some connector blocks in the socket on A or B post while refitting the door loom plugs I would think.

Worth giving the battery a charge up aswell to make sure you are testing with a good 12v supply

Offline brianh

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Re: Central Locking issues
« Reply #2 on: June 04, 2018, 07:28:41 PM »
If the red light worked before and doesn't now when pressing the key try watching it as you start the engine - does it come on? If it does not then its possible if you've removed the door card as part of the repair process that you have unplugged it, though just as likely that its down to broken wires.

If it does come on I'd try resyncing the key fob, plus a new battery in the key wouldn't go a miss. But get the car's own battery charged first as it may be the controller playing up due to a lack of electricity.

Offline supernube

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Re: Central Locking issues
« Reply #3 on: June 04, 2018, 07:45:43 PM »
Ok thank you...I will go check the wiring and plugs again now while its still light. The light in the front door went off when I touched the wiring in the rear door...I saw it go off and thought Hmmm thats annoying lol...short ? but no fuses have blown ...unless Im checking th wrong fuses ?
Anyway I will pop out now and have a look.

And all plugs are on inside the door...I checked them before I put the door card back on ...because I HATED getting the door cards off in the first place...snap pop ..broken !!

There must be a special tool for the job because a flat blade screw driver... a long strong bread knife...and a putty knife were no good at all lol.

Thank you

Offline gregers

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Re: Central Locking issues
« Reply #4 on: June 04, 2018, 10:32:22 PM »
you can buy trim tool removers from most places,you will no doubt break a few clips.worth getting a few for spares.
also check the wiring in the rear hatch.
vw t5 camper van.
reality is for people with no imagination
rip dad 21/12/10
rip mum 3/5/16
rip bruv 11/5/17
The FordMPV.com Forum - The free forum for questions and answers relating to the Ford Galaxy, S-Max and C-Max

Online johnnyroper

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Re: Central Locking issues
« Reply #5 on: June 04, 2018, 11:14:11 PM »
Ok thank you...I will go check the wiring and plugs again now while its still light. The light in the front door went off when I touched the wiring in the rear door...I saw it go off and thought Hmmm thats annoying lol...short ? but no fuses have blown ...unless Im checking th wrong fuses ?
Anyway I will pop out now and have a look.

And all plugs are on inside the door...I checked them before I put the door card back on ...because I HATED getting the door cards off in the first place...snap pop ..broken !!

There must be a special tool for the job because a flat blade screw driver... a long strong bread knife...and a putty knife were no good at all lol.

Thank you

Itís not the plugs inside the door I was referring to but inside the socket on A post or B post depending if front or back door. The socket is made up of several smaller wiring blocks clipped in to the rear of socket,they can push out when refitting plug from the door and cause circuits to not work.

Offline Marcas

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Re: Central Locking issues
« Reply #6 on: June 11, 2018, 09:28:02 AM »
Hello, New user here.
I have  the same issue with a Seat Alhambra 2004. When using the buttons on the drivers door wouldn't open but the others would, then next time around it would open. Tried re syncing the key as the manual said now I have no Central Locking, either using the key in the lock or pushing the button. I have also lost the wee red light on the door, Fuse 27 is fine . . . :-(  I am sure I am just as frustrated as everyone else with this issue. Does anyone know if there are some more fuses hidden in the car???
Found one wire broken at the Terminal Block leading from door into Pillar A, am using a voltmeter to see if any more are broken but think that the Red Light must be part of my problem . . .

Offline brianh

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Re: Central Locking issues
« Reply #7 on: June 11, 2018, 05:20:22 PM »
Not just a matter of them breaking, the insulation flakes off as well where it bends, causing the potential for short circuits.

Check all the doors, including the tailgate/boot and repair anything you find with broken insulation or snapped wires, that may be enough. Suggest do it asap as sometimes they helpfully end up deadlocking themselves)

I think fuse 19 is linked to the central locking as well (least on my mk1 it was, not sure offhand on the mk2 which is what your 2004 one would be). That for me also effected the instrument cluster (forgot its memory every time you switched ignition off i think if i remember correctly - so dials would do a full sweep when using the keys, miles on trip not remembered, etc) You've obviously got some issue beyond the key itself with the remote buttons not working, sort that out first (so the locks all work together) then try to sort the key out.

Offline Marcas

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Re: Central Locking issues
« Reply #8 on: June 12, 2018, 12:56:17 PM »
Thanks brianh. Will have a look at the tailgate as it is not locking either, thought the central locking works from inside the car if I use the switch inside the door. I am trying to figure out how the red light inside the door is not working. My big problem began when i tried to re-sync the keys! SEAT garages want me to come in to have it plugged in for the diagnostics . . £165 . . . ouch!   Does anyone know how I can disable the alarm altogether? I have taken out the fuse for the sound but if I take out the fuse for the flashing lights(Hazards) then I cannot use my indicators.
thanks

Offline brianh

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Re: Central Locking issues
« Reply #9 on: June 12, 2018, 07:44:10 PM »
Diagnostics probabbly won't tell you anything, might be a daft question, but have you had the drivers door card off? The led on the door is on a loose cable with a push together connector, its possible either you haven't plugged it back in, or got it wrong somehow (not sure if you can get the connector reversed). It pulls off quite easily so may have just been dislodged.

I think i found pulling fuse 19 killed the locks on my mk1 which may be enough to kill the alarm (provided you do it when the car is unlocked) until you've got it fixed. I don't think my MK1 had an alarm (Apsen spec) so never had that issue. Not had exactly the same problem on the mk2 (just broken door cylinders on both doors - need to take them out and sort it, been using the remote key since I got it to work).

Red light may be down to wiring issues in other doors upsetting the locking, so i'd start there if I were you.

Offline Marcas

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Re: Central Locking issues
« Reply #10 on: June 14, 2018, 08:47:41 AM »
I have had the door card off, but with all the messing about I decided to take the entire loom out as well! It is a bit tight for space trying to work between the door and the post. I can see two other wires that are damaged so I think I'll take the entire thing to the electronics guy at my work and ask for him to have a look. I have also ordered some terminal extraction tools from ebay , cost £2.00 so if they only take out the one terminal that is broken I'll be happy. As for the alarm, I covered up the four sensors with paper and tape so I can put the fuse for the hazards/indicators back in to be able to make a few short trips about home. I'll get him to test the red light as well, It was definitely plugged in and with the connectors designed as they are they can't be put in the wrong way . . . . just as well otherwise Murphys Law would say we would put them all in the wrong way!!.
Thanks again and I'll post again when I have something.

Offline supernube

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Re: Central Locking issues
« Reply #11 on: June 16, 2018, 02:11:37 PM »
Hello again.

I have just been and had a good look at the wires in the door posts no more broken ..that I can see anyway...and if its inside the insulation then it can stay like it cos Its not worth the hassle.

please lets assume ..for now.. that the wires are all ok...I have checked all doors ..and boot ...repaired the front door wiring ..took the entire loom out ..repaired the rear near side door wiring as when I originally did that door I had the two blue wires ..(they were the same) mixed up and when I locked it with the key fob ..that door would unlock when the others locked ?

I changed that over and now all doors lock and unlock together ..USING THE KEY NOT FOB BUTTON ? as the fob is not working for me to test with it ??

I have checked all fuses...and found fuse 60 gone...which I think is the interior lighting ..so nothing to do with central locking.

I have done a reset of the key fob ...but that is not working...turn the key 3 times in unlock direction...blah blah...at the end the door red light just stays on and then eventually goes off....the light on my fob is lighting up when pressed so cant be battery.

I am about to go out again and just check the front drivers door post connections just to rule that out...as I struggled getting that one back in its plug..but I am sure its ok.

please help ...this is driving me nuts

Thank you

Offline niall

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Re: Central Locking issues
« Reply #12 on: August 17, 2018, 10:00:09 AM »
Hi there...another thing for you to check is the door lock motor itself. My drivers door was locking intermittently which I think was affecting the rear passenger door also??? How I'm not sure?? Anyway..I removed the motor from the door locking mechanism...sorry I've no pictures to assist...I connected the motor to a power supply and noticed it was drawing a lot of current, over half an amp (from memory), should only draw approx 150mA.
So I bent back the metal tangs that hold the motor together and removed the central core with motor bushes etc. The motor commutator was completely full of carbon dust from the brushes. This must have been shorting out the copper commutators to each other...see example picture.....
https://www.google.co.uk/search?q=motor+commutator&safe=active&hl=en-IE&rlz=1C1GGRV_enIE751IE755&tbm=isch&source=iu&ictx=1&fir=ksiH7NeQ6pApJM%252C3WB7McM_iybvSM%252C_&usg=AFrqEzcpq7bV0LW8m3KSgO7iqjkoQ7MuLQ&sa=X&sqi=2&ved=2ahUKEwiAxfK02_PcAhWlxVkKHVbQBXYQ_h0wJHoECAQQBA#imgrc=ksiH7NeQ6pApJM

Anyway, when I removed/cleaned all of the excess dust from the motor and reassembled and tested...it only drew 150mA approx???

Put door back together and it has worked and rear pass door has worked without fault since.

Only sorry I didn't do a video!!

Offline regw

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Re: Central Locking issues
« Reply #13 on: September 21, 2018, 07:43:49 PM »
Many thanks to Niall who's door lock pictorial got me inspired to have
another go at the central locking which has been a PITA for ages.
I did the door cable check and repair stage a while back but the central
locking was still intermittent and the only doors which locked and unlocked
reliably were the drivers door and tailgate.
I was fed up with it and didnt touch it for months.
 
Today I removed the rear near side lock and stripped it down



tested the diodes, cleaned the brass sliders, soldered the pinch joints on the pins
and it all looked in good shape.
Next I tested the motors on my bench power supply after squirting some carb cleaner through them and allowing them dry out

The smaller deadlock motor spun up nicely using about 50mA free running and about 100-150mA when I stalled them momentarily with finger and thumb

The door lock motor didn't look so healthy.
At first it didnt spin up and the current shot up suggesting a dead short
Spinning it manually freed it up enough to run but it wasn't happy.
Speed was intermittent and the brushes sparked a lot

I didn't want to put that back in so took it apart.
There was very little evidence of carbon dust, I may have rinsed that out with carb cleaner but the commutator showed signs of wear and close examination with a magnifier
showed bridging between segments.


Use of a scalpel and a 3mm strip of wet and dry paper cleared the bridging and got it
into better shape and after reassembly, it tested out fine repeatedly.



I refitted it and now all the door locks work!

Time will tell, but its the first time the central locking has worked properly for ages

Offline Marcas

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Re: Central Locking issues
« Reply #14 on: November 07, 2018, 12:03:17 AM »
I am having a similar confusing time with my 54 Alhambra. Tried to re sync the key as described in the manual but while the key light flashed three times the light on the door did nothing, had an intermittent central locking issue (where the doors would unlock from the button on the key except for the drivers door then next time all would open etc etc). checked wiring between door and pillar, ended up taking of the door card found broken wire, repaired all that , see an earlier post of mine, i bought a special tool from ebay for a couple of pounds to take out the terminals to do the job well, worth the money! . . . any way everything works manually now and I have the wee red flashing light in my drivers door but still cannot get the key to re-sync. I am beginning to wonder if there is another way to do it, have tried it a dozen times but while the lights flash, five times on the key. nothing happens. MOT tomorrow so i will find out if it lets me down as the alarm can go off on a whim at this stage. 

 

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