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DaftOldGit



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

United Kingdom 
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?
Post #488053 3rd Jan 2016 8:31am
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Go Beyond



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

United Kingdom 
Is it not possible to follow the loom back ?
Post #488055 3rd Jan 2016 8:52am
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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
Post #488063 3rd Jan 2016 9:10am
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derbywill



Member Since: 25 Mar 2010
Location: Derbyshire
Posts: 559

England 2005 Defender 90 Td5 XS CSW Java Black
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
Post #488076 3rd Jan 2016 10:06am
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DaftOldGit



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

United Kingdom 
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?
Post #488084 3rd Jan 2016 10:21am
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willyj



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

United Kingdom 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
Post #1049632 24th Oct 2024 10:45am
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DaftOldGit



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

United Kingdom 
That was eight years ago!
I don’t even have the motor any more.
Post #1049734 25th Oct 2024 10:10am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17443

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Post #1049739 25th Oct 2024 10:36am
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