Dispatch 2007 central locking

John · 2025-05-10 14:43:59

Hi All.

I’m trying to install an alarm on my dispatch, but I’m a complete amateur.
The only wires that I haven’t been able to pick up are the ones for the central locking.

My alarm sends a brief negative through its lock & unlock wires when I press the lock & unlock buttons.
Therefore I assumed that the central locking wires of the van would trigger the locking mechanism if given a brief negative.
I found the wires that come through the A-frame, from the door, and tried a negative to each one, but there was no ‘clunk’ of the door lock.

Can anyone tell me what colour the wires will be, and/or whether they will have a positive or negative trigger?

Many thanks.
John

N.B. All of the wires from inside the door (central locking & electric windows) are white.
They all go into a connector & come out in a variety of colours, but the connector is in so tight that I can’t pull it out, so I’m using a sharp test-lamp to prod the wires (& my fingers) which isn’t ideal.

tee_cee · 2025-05-10 18:23:07

The locks work with one polarity to lock, and the reverse to unlock. The colour of the wires is irrelevant, they are all numbered, if you can read the print. I would suggest trying to trace back from the doorframe contact points.

John · 2025-05-10 19:52:21

Thanks tee_cee.

I can see print on the white wires (inside the door), but I can’t see any print on the coloured wires.
I can’t trace those white wires visually, as they get twisted into a loom and go straight into the back of a connecter block which is so tight that I can’t pull it forward to see which white wires become which coloured wires.

The only other way to trace them would be to skin some of the pvc coating off the wires, and then send a current down (testing each one at the other end).
I was hoping that someone here would know what colour(s) work the locking mechanism.

But … if what you said is right about the central locking using one polarity to lock, and the other to unlock, then I won’t be able to work the central locking from the key-fob anyway, because the alarm has 2 wires and sends a negative down each one. ☹

Thanks anyway.

John · 2025-05-15 11:17:57

Update:

I took the door panel off & tried to trigger the locking mechanism by probing each wire; giving a brief positive & negative charge to each.
It did diddley squat. ☹

So, I took the radio out, to get behind the central locking buttons in the middle of the dash.
It has 8 wires that go to those buttons, and one of its two blue wires triggers the front door locks (using a negative trigger). Yaaay!

The only issue with it is that that blue wire both locks and unlocks using a negative trigger.
It’s not a big deal.
It just means that both the [Lock] & [Unlock] buttons of my alarm’s fob will trigger the mechanism to lock or unlock – depending on what state it’s currently in (rather than which button is pressed)
… if you see what I mean.

I’m going to feed both the [Lock] and [Unlock] wires of my alarm to that blue wire.
That should work
… shouldn’t it?

Oscarklemo · 2025-06-29 22:04:18

Did it? Thinking of this myself.

RegW · 2025-06-29 23:51:39

Oscar I think John has the MK2 model which may or may not have the same locking circuitry
so be warned before tinkering with it.

I suggest you start a new thread on yours and give some info on the problem, year, model etc
and I see if can drag up some info on the locking system relevant to yours

Last edited by RegW (2025-06-29 23:51:56)

John · 2025-06-30 07:48:56

Hi Oscarklemo.

I’m having to do this from memory, as the cheap Chinese alarm that I was using malfunctioned a few weeks ago, & I have to wait 25 working days for a replacement.

It did indeed work.
I had a side-effect though, which may possibly be specific to my vehicle (due to my modifications).
Side-effect: closing a sliding side-door triggered the central locking to lock the front doors.
My modification: I have insulation tape over the locking connections of the sliding side-doors to prevent them from ever locking.
That may seem counterintuitive, but I would prefer not to have thieves damage my van with crowbars – so the aim is to have the back door & side doors unlocked (but alarmed).
i.e. A thief will try the doorhandle & find that it opens (so they don’t gemmy it) but the alarm sounds & alerts the neighbours, which limits the thief’s treasure hunt to a few seconds.
(Anything of any value in my van is hidden under worthless stuff)

Having the front doors lock when a side-door is closed isn’t an issue for me, as I can never accidentally lock my keys in, due to my modification.

Good luck with your alarm.
I hope that you get more help from the people here than I did.

RegW · 2025-06-30 15:28:40

John wrote:

Good luck with your alarm.
I hope that you get more help from the people here than I did.

Well you are asking about a MK2 in the MKI section John
for myself I'm still struggling to find decent info on my MK1
so not much help on a MKII

John · 2025-06-30 21:17:20

Thanks, RegW.

I wasn’t aware of the MK1 / MK2 issue.
I thought it was just a ‘General Discussion’ section.

Noted.

kenbw2 · 2025-06-30 21:34:18

I'll move you to the Mk2 section

The Dispatch | Expert | Scudo Hub

Get help & share your Citroen Dispatch (Jumpy) | Peugeot Expert | Fiat Scudo tips

#1 2025-05-10 14:43:59

Dispatch 2007 central locking

#2 2025-05-10 18:23:07

Re: Dispatch 2007 central locking

#3 2025-05-10 19:52:21

Re: Dispatch 2007 central locking

#4 2025-05-15 11:17:57

Re: Dispatch 2007 central locking

#5 2025-06-29 22:04:18

Re: Dispatch 2007 central locking

#6 2025-06-29 23:51:39

Re: Dispatch 2007 central locking

#7 2025-06-30 07:48:56

Re: Dispatch 2007 central locking

#8 2025-06-30 15:28:40

Re: Dispatch 2007 central locking

#9 2025-06-30 21:17:20

Re: Dispatch 2007 central locking

#10 2025-06-30 21:34:18

Re: Dispatch 2007 central locking

Board footer