adding CC stalk to com2000

[Gryffindor]

If anyone's reading who has done the cotton bud trick, does my stalk look like yours or not?

Sorry for the edit above, just wanted to answer that particular point.

Thanks for posting the pictures, it's the first stalk that I've seen without an end cap that can be popped off...

I can't be certain about this, but I think the Trip Computer functionality is in the  display and on some vehicles, this needs to be activated via Lexia...

Edit:

https://www.peugeotforums.com/threads/ho...post-24671

https://www.youtube.com/watch?v=WY-Zg6MHLfE

No need to apologise for editing - I often wonder just how much electricity is used up by all those emails flying around the globe which needlessly quote others in full!

Yes, the 3-line display does need to be programmed, both for its trip meter function and for the external temp sensor (which I have standing by). Other forums have explained the process.

Thankyou very much for the links - the thread was useful and the video an eye-opener.

From various earlier threads on the cotton bud trick I had assumed that it poked all the way through the end cap to push something at the level of the circular pcb track inside the main part of the stalk - but when the chap in this video presses his end button (at about 0:24) you can see it moving a copper contact inside the end cap so that that would make contact with that pcb track if the cap was on the stalk. This must only need a short bit of cotton bud stalk then. A revelation to me!

Does this interpretation sound correct?

Now, with that in mind, I had a close look at the pcb track inside the vlogger's stalk and compared it to mine. I don't think there's any difference:

   

Logically therefore, all I really need is a different end cap... unless my stalk only having rear wiper control remains an issue?

Next, a comparison of the insides of his and my end caps:


   

1. My end cap, with no end button
   
2. The end cap he replaced, with no button
   
3. His replacement end cap with a button
   

So I would need a copper track as well as a cotton bud for that trick to work for me. I suspect therefore that several end caps with that copper track and designed for a working end button were made but fitted with 'dead' end buttons; that may have been more efficient in production than the completely dumb end cap I have. That surprises me but there we have it, it seems.

Now, bearing in mind that all I am missing in terms of electrical control is a copper contact, but the pcb track it makes contact with seems to be present and correct, one post in that Peugeot forum proved particularly interesting:

Looking at the pcb, im presuming the inner contact is either gnd or 5v (guessing at the mo) and the lower small contacts are for the wiper bits on the rotation of the stalk end, and the long contact top right is the contact for the trip display etc, so by this and from watching your video the push button bit simply makes the connection from the middle contact to the upper right contact which would mean that a simple push button could be made into the standard non push button end where at the end you could simply put a metal pin/plate which when pressed would create the circuit... ...and possibly drill a small hole in the end to fit my own push button until I get round to getting a proper end stalk with button."

(My edits - more likely 12v than 5v though.)

In a later post:

"...the test would simply be to bridge the circuit with a screwdriver or something metal to simulate the press of the 'real' button etc."

https://www.peugeotforums.com/threads/ho...post-74866

It's just a shame I don't already have my 3-line MFD installed so I could try this.

I wonder, would someone who has a 3-line display and a wiper stalk with button be willing to try popping the cap off and bridging these tracks, to see if that does operate the onboard computer? Just so long as you're happy doing so won't cause any damage, of course.

We may almost have the answer to this riddle!

As for sourcing the part, I did find slightly cheaper ones from breakers, and the Peugeot forum's DIY pushbutton trick or the cotton bud trick would be even cheaper, though for a nicer finish (if that's important) this seems to be the jobby:

https://www.ebay.co.uk/itm/124389588723

It even comes with "Option Ordinateur de Bord". Indeed!

So I was right in guessing earlier that "on-board computer" refers to the presence of an end button.

However, for not much more I could get one with a com2000 attached to it to play with...