After changing the speaker on the passenger door the external lock does not work and the light on the bottom of the door does not come on.

If I lock/unlock the car from the driver side the passenger side locks/unlocks fine.

The passenger side lock used to be similarly intermittent (sometimes it would work fine sometimes just lock or unlock).

After removing the door card once to have a look at the speaker in November it started working fine and had been fine until I changed the speaker today. Are there any wires going to the lock/handle between the door card and the metal liner that I could have nocked loose or could I have just disturbed it in the hinge baffle? (couldn't see any split wires in the baffle though).

There are wires inside the rubber door bellows for the central locking. It's pretty close to the speaker so you might have disturbed a weak wire(s). I had one broken inside mine that made intermittent contact and made the doors lock/unlock randomly. Also, the door post connectors plugs/sockets can be temperamental if dirty/corroded.

 

 

 

......

 

Edited 19 March, 20215 yr by TMB

This is the routing of the wires for the locking on passenger side...

 

Edited 19 March, 20215 yr by TMB

9 hours ago, TMB said:

There are wires inside the rubber door bellows for the central locking. It's pretty close to the speaker so you might have disturbed a weak wire(s). I had one broken inside mine that made intermittent contact and made the doors lock/unlock randomly. Also, the door post connectors plugs/sockets can be temperamental if dirty/corroded.

 

 

 

Do you know which colour wire goes to the lock?

15 hours ago, JoeF said:

Do you know which colour wire goes to the lock?

 

Don't take these as Gospel as they may vary.

 

.....

 

 

Brown

Green/blue

Blue/red

Purple/white

Blue/red

*Blue/purple (think this one is possibly a misprint in the diagram as the wire colour shown doesn't match the stated colour codes. So could be Purple/yellow).

 

Edited 20 March, 20215 yr by TMB

Driver's side for reference....

 

.....

 

Brown

Yellow/blue

Green/yellow

Brown/yellow

Blue/yellow

Purple/yellow

 

 

Edited 20 March, 20215 yr by TMB

Useful and interesting thread....

 

https://www.briskoda.net/forums/topic/473390-lockingunlocking-issues-and-probable-cause/

 

On 20/03/2021 at 21:56, TMB said:

 

Don't take these as Gospel as they may vary.

 

.....

 

 

Brown

Green/blue

Blue/red

Purple/white

Blue/red

*Blue/purple (think this one is possibly a misprint in the diagram as the wire colour shown doesn't match the stated colour codes. So could be Purple/yellow).

 

I am guessing that,

 

Brown = power 

Green + blue = lock/unlock

Blue + Red and Purple + Yellow is the lock motor

 

However what are pink + white and blue + red doing? Is it some sort of locking sensor?

 

Brown pin 7 is earth.

 

Wire from pin 8 is the door open microswitch. (Makes the connection to earth when door is open).

Wires from pin 4 and pin 5 are status feedback about the state the lock is in (locked or unlocked) and the state of the key barrel (neutral, held clockwise or held anticlockwise) but can't remember which is which just now; I'll check those including the resistance values in each state when I get home in an hour or two.

Wires from pins 1 and 2 make the motor run in the relevant directions for unlocking or locking depending on the polarity of the power sent down them.

13 minutes ago, Wino said:

Brown pin 7 is earth.

 

Wire from pin 8 is the door open microswitch. (Makes the connection to earth when door is open).

Wires from pin 4 and pin 5 are status feedback about the state the lock is in (locked or unlocked) and the state of the key barrel (neutral, held clockwise or held anticlockwise) but can't remember which is which just now; I'll check those including the resistance values in each state when I get home in an hour or two.

Wires from pins 1 and 2 make the motor run in the relevant directions for unlocking or locking depending on the polarity of the power sent down them.

I am guessing that earth is broken then since when it works both the light comes on when the door is open and exterior lock unlocks/locks both both stop when it isnt? 

 

I cant find a break in the wires anywhere visible inside the door or in the bellows even went as far as cutting a lot of the protective tape and separating the wires out. I then went and shorted the pins in the door connector with a screwdriver to check if the issue was with them and it locked then the fuse went for the locking in the drivers side panel :(.

The thin brown wire going to pin 5 of the brown 6-way connector at the A-pillar is an earth shared by the lock module and the door warning light, so yes, that's a good one to investigate.

 

15 hours ago, Wino said:

The thin brown wire going to pin 5 of the brown 6-way connector at the A-pillar is an earth shared by the lock module and the door warning light, so yes, that's a good one to investigate.

 

I found two earth wires spliced together in the door covered by some tape. Is this an aftermarket fix or done in the factory? One side goes to the door open light other side up to the lock.

Looks to have been done okay though.

Edited 1 April, 20215 yr by JoeF

Factory joint. Lots of earth wires do that.

Check continuity from there to battery negative/chassis.

Edited 1 April, 20215 yr by Wino

24 minutes ago, Wino said:

Factory joint. Lots of earth wires do that.

Check continuity from there to battery negative/chassis.

I have diagnosed the issue to the plug that goes into the door lock.

Sometimes I can just about push the wire into the plug and it will work. I have stripped two of the wires and when tapping them together or through a resistor it locks/unlocks.

 

How can I push the metal connectors out of that plug? If not where could I get another plug?

(The stripped green wire going to pin 4 seems to be the one that causes that activates the lock when tapped against the earth.)

I think it might be the connector that one is plugging into that is the real problem, like in the video of mine that TMB posted; pushing the connection is probably waggling the pin in the circuit board. l

 

Part numbers are printed in tiny letters on the connector housing of what you're holding if you want to go for a replacement.  Depinning tools don't cost much, they look like a little two-pronged fork.

7 hours ago, Wino said:

I think it might be the connector that one is plugging into that is the real problem, like in the video of mine that TMB posted; pushing the connection is probably waggling the pin in the circuit board. l

 

Part numbers are printed in tiny letters on the connector housing of what you're holding if you want to go for a replacement.  Depinning tools don't cost much, they look like a little two-pronged fork.

Thanks. I ended up finding that if I held the plug at an angle it would make contact and work fine.

Ended up cutting part of the plastic surround and clip off of the connector so it would fit further in then super gluing it in place. Not an ideal solution but should hopefully suffice.

On 01/04/2021 at 14:46, Wino said:

I think it might be the connector that one is plugging into that is the real problem, like in the video of mine that TMB posted; pushing the connection is probably waggling the pin in the circuit board. l

 

Part numbers are printed in tiny letters on the connector housing of what you're holding if you want to go for a replacement.  Depinning tools don't cost much, they look like a little two-pronged fork.

I ended up buying a replacement door lock and mechanism and plug. However I have encountered another seemingly random issue.

The door lock now does exactly the opposite of what it is supposed to. If I lock from the drivers door all the doors lock but passenger door unlocks, if I lock from passenger door it locks the passenger door but unlocks all the others. 

 

Any ideas about where I might have gone wrong? All the wire colours seem to match up.

Have you still got the old lock? What part number was on it?

What replacement did you buy, part number-wise?

Link?

It does sound like a wire or two is swapped over somewhere but best start with identifying what you had and what you now have in there.

14 minutes ago, JoeF said:

I ended up buying a replacement door lock and mechanism and plug. However I have encountered another seemingly random issue.

The door lock now does exactly the opposite of what it is supposed to. If I lock from the drivers door all the doors lock but passenger door unlocks, if I lock from passenger door it locks the passenger door but unlocks all the others. 

 

Any ideas about where I might have gone wrong? All the wire colours seem to match up.

Sorry ended up that the new plug was wired up in a different order to the old one. Switched some of the wires around and it works fine now. Must have been from a later model car.

Edited 13 April, 20215 yr by JoeF