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DaftOldGit

Member Since: 20 Sep 2015
Location: London
Posts: 52

VDO DTCO 1381 Tachograph

My motor had this tacho fitted when i bought it. I have no need of it, but when I unplug it the speedo and odometer stop working.

Does anyone have experience of these units? Is it just wired in series with the speedo somehow, and i can just short a couple of wires to restore operation, or is there more to it than that?

3rd Jan 2016 8:31am

Go Beyond

Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6678

Is it not possible to follow the loom back ?

3rd Jan 2016 8:52am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

Re: VDO DTCO 1381 Tachograph

DaftOldGit wrote:
My motor had this tacho fitted when i bought it. I have no need of it, but when I unplug it the speedo and odometer stop working.

Does anyone have experience of these units? Is it just wired in series with the speedo somehow, and i can just short a couple of wires to restore operation, or is there more to it than that?

https://www.defender2.net/gallery/albums/u...rchive.pdf

3rd Jan 2016 9:10am

derbywill

Member Since: 25 Mar 2010
Location: Derbyshire
Posts: 556

Those instructions are the old way of installing a digital tachograph, the short speedo cable didn't prove reliable. If it's an early puma it will be like this. If it's newer follow the loom back there should be a yellow box which is a M1N1 adaptor this will have a +30 and +15 power supplies also the speedo signal will feed into this, you will need to join the speed signal wires back together.
Regards
Will 2005 90 XS
1954 86'' Series 1 tilt
1968 88” 2A 200tdi
2002 110 Hardtop

3rd Jan 2016 10:06am

DaftOldGit

Member Since: 20 Sep 2015
Location: London
Posts: 52

Thanks for your replies.

Its a 2007 Puma, but i dont know when the tacho was fitted.

I'll have a look later and see which way it's been done.

I'm guessing that if its the older style then i just need to fit a new speed sensor and reconnect the original cable, then just unplug the tacho and leave the plugs as they are?

3rd Jan 2016 10:21am

willyj

Member Since: 23 Oct 2009
Location: Carmarthenshire
Posts: 189

2011 Defender 110 Puma 2.4 USW Stornoway Grey

Hi DaftOldGit
Just found this thread. I have the same tacho unit and I was wondering if you might still have it kicking around as I’m after the cable?

Thanks Wil

24th Oct 2024 10:45am

DaftOldGit

Member Since: 20 Sep 2015
Location: London
Posts: 52

That was eight years ago!
I don’t even have the motor any more.

25th Oct 2024 10:10am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17337

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Any help?

https://www.defender2.net/forum/topic93839.html

25th Oct 2024 10:36am

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