Tachograph @ Disco 2

ohowson · Mar 29, 2021

Firstly, let's not worry about the 'do you need one' argument, I do.
I know a few people have done this - I have an analogue tachograph to fit to my 04 disco 2.
There are some grounds, a permanent live and an ignition live - I reckon I can manage that lot from the body and fuse box. What I'm not sure about is:

a) I need to tap a wire that's live only when the lights are on - is there an easily accessible one?
b) I need to tap a signal from the ODB - does anyone know *which* ODB wire that is likely to be?

Then I need to figure out where it's going...

Colthebrummie · Mar 29, 2021

ohowson said:
Firstly, let's not worry about the 'do you need one' argument, I do.
I know a few people have done this - I have an analogue tachograph to fit to my 04 disco 2.
There are some grounds, a permanent live and an ignition live - I reckon I can manage that lot from the body and fuse box. What I'm not sure about is:

a) I need to tap a wire that's live only when the lights are on - is there an easily accessible one?
b) I need to tap a signal from the ODB - does anyone know *which* ODB wire that is likely to be?

Then I need to figure out where it's going...

Christ. I have enough trouble fitting a radio.

Col

ohowson · Mar 29, 2021

Colthebrummie said:
Christ. I have enough trouble fitting a radio.

Col

Yeah - I'm not excited at the project.

Interceptorxj · Mar 29, 2021

I thought they had to be fitted and calibrated by an approved tachograph centre?

Beneagles · Mar 29, 2021

Interceptorxj said:
I thought they had to be fitted and calibrated by an approved tachograph centre?

No, they only need to be checked and/or calibrated annually by an approved centre. Anyone can fit them.

Beneagles · Mar 29, 2021

ohowson said:
Firstly, let's not worry about the 'do you need one' argument, I do.
I know a few people have done this - I have an analogue tachograph to fit to my 04 disco 2.
There are some grounds, a permanent live and an ignition live - I reckon I can manage that lot from the body and fuse box. What I'm not sure about is:

a) I need to tap a wire that's live only when the lights are on - is there an easily accessible one?
b) I need to tap a signal from the ODB - does anyone know *which* ODB wire that is likely to be?

Then I need to figure out where it's going...

Most of the places that supply them will talk you through the fitting process. vdotachograph.co.uk would be one example.

Interceptorxj · Mar 29, 2021

Beneagles said:
calibrated annually by an approved centre. Anyone can fit them.

Calibration every 2years and extra at 6 years??

ohowson · Mar 29, 2021

Beneagles said:
Most of the places that supply them will talk you through the fitting process. vdotachograph.co.uk would be one example.

Yes indeed - whch is why I know there's a wire that needs to be connected to the ODB - but I've spent so long on the phone to him already I'm hoping someone 'just knows'

ohowson · Mar 29, 2021

Interceptorxj said:
Calibration every 2years and extra at 6 years??

I'll be triple checking that when I get it calibrated.

Beneagles · Mar 29, 2021

Interceptorxj said:
Calibration every 2years and extra at 6 years??

Sorry...every 2 years...yes. 6 yearly checks only apply to the older models, the digital are just the bi-annual

ohowson · Mar 29, 2021

Well as this is an analogue one, hopefully it's 6 yearly. If I can find the wire...

AndyPoole · Mar 30, 2021

I didn't htink the D2 was ODB

ohowson · Mar 30, 2021

Well I've not been out to check but a bit of casual googling suggests it does, as does the chap I bought the tachograph from.

Stanleysteamer · Mar 30, 2021

AndyPoole said:
I didn't htink the D2 was ODB

If you mean OBD, then yes the disco 2 is OBD2, thats where we all stick our diagnostic fings when they go wrong!

ohowson · Mar 30, 2021

tfft. still don't know which wire though - he's only in Coventry I might just take it up and get him to do it!

Stanleysteamer · Mar 30, 2021

Loads on 'ere!
https://www.landyzone.co.uk/search/138821021/?q=OBD+Discovery+2&o=relevance&c[node]=8

ohowson · Mar 30, 2021

Stanleysteamer said:
Loads on 'ere!
https://www.landyzone.co.uk/search/138821021/?q=OBD+Discovery+2&o=relevance&c[node]=8

Yup, though none solving my problem!

Stanleysteamer · Mar 30, 2021

ohowson said:
tfft. still don't know which wire though - he's only in Coventry I might just take it up and get him to do it!

If it comes on an OBD2 style plug then you could just stick it in, but if it has to be permanently wired in then you deffo need to know which one.
Thort they had to be fitted at an official place anyway.

ohowson · Mar 30, 2021

It's just a signal wire.
As it's < early 06 you can self-fit an analogue one. They can be fitted anywhere as long as you have an LED that indicates it's on. I'm actually thinking of putting it in the otherwise bloody useless door pocket if I can get the wires to flex nicely.

ohowson · Mar 30, 2021

ohowson said:
It's just a signal wire.
As it's < early 06 you can self-fit an analogue one. They can be fitted anywhere as long as you have an LED that indicates it's on. I'm actually thinking of putting it in the otherwise bloody useless door pocket if I can get the wires to flex nicely.

(and truth be told I specifically bought an older vehicles because the price of a modern digital tachograph + fitting + calibration is likely to set you back best part of 2 grand - which for something I'll probably do a couple of dozen times a year was just not worth it.

Tachograph @ Disco 2

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