Fitting tracker to vehicle.

[davesparks]

I was just writing it expecting people to be able to understand what I mean.

I need to connect the red wire to a constant +ve 12vDC supply, the black to the -'ve and the yellow to the switchable live ignition accessory wire. I then need to find a suitable location to place in-line a 12v 40A normally open relay which releases upon a negative connection of the circuit. Will you help me know?

A 40A relay in tbe stater motor cable? Are you sure that will be big enough?

 

[Spoon]

Apologies, I thought that's what forums were for, to help people and share your knowledge. At least thats what I do with things I know about. Clearly not.

I know exactly what you mean mate... Silly forum... Reminds me of a conversation I had when I rang 111.
I bust my nose a few years and me and my 9 year old daughter thought it would be a great idea to make it look better. (It's a bit bent). I have a Dremel and everything.
Well I rang 111 for advice on the best way to do this and they wouldn't give it to me.... I told them similar to what you put above, I mean, whats the point in having a service that is meant to give out advice if they don't give out advice....

 

[DPG]

A 40A relay in tbe stater motor cable? Are you sure that will be big enough?

It'll be the solenoid feed rather than the main supply I would imagine. Fair point though.

 

[UNG]

I was just writing it expecting people to be able to understand what I mean.

I need to connect the red wire to a constant +ve 12vDC supply, the black to the -'ve and the yellow to the switchable live ignition accessory wire. I then need to find a suitable location to place in-line a 12v 40A normally open relay which releases upon a negative connection of the circuit. Will you help me know?

Good luck you make it sound so easy have you ever heard of Canbus

it was just to get across that I am not someone who doesn't know what end of a soldering iron gets hot, I wanted to tell you that I know more than the average DUYer. I also used to install sound systems when I was a boy racer so I'm used to digging out cables and doing works in cars, I just wanted to confirm that what I planned on doing, was in fact the right way to do it and there wasn't an easier/better way of doing it.

You may be better than than the average DIYer but in the last 10 - 15 years cars have become very complicated electrically, and most parts are controlled across the canbus system which in some cases is fibre optic and not copper
Where the canbus is copper breaking into the canbus can cause quite major problems if done incorrectly
Also to complicate things further most of the recent Land Rovers I have worked on have 2 canbus systems

Like it or not what you are trying to do really is a specialist job unless you like the risk of possibly ending up with a large paperweight is it goes wrong

 

[pirate]

If you can run a Range Rover you can afford to pay an expert for this work.
Car electronics are far more complicated than some people think, and while i fully accept that you may be competent in some fields, these systems are horrendous, and desigbed to thwart the DIY brigade. It'll cost you less than a tank of fuel...and you will have some redress if it doesn't work.

 

[Steviecuk]

I get what you're saying, but am I wrong in saying that there should be a wire (potentially a 12v supply) going from somewhere like the fuse box or ignition that then that switches live when the ignition button is pressed and goes ? Does this simplified example undtrue now?

 

[DPG]

I get what you're saying, but am I wrong in saying that there should be a wire (potentially a 12v supply) going from somewhere like the fuse box or ignition that then that switches live when the ignition button is pressed and goes ? Does this simplified example undtrue now?

As people have said above, things aren't usually that simple now. There may be a simple 12V line you could break into, but I certainly wouldn't risk it, and I've dabbled quite a lot with auto electrics over the years.

 

[UNG]

Ok there will be a input or output probably from or to a Can Controller that operates the ignition / starter. If you are that pigheaded that you want to carry on doing it against the advice given, then your starting point would be to get hold of a wiring diagram

I'm assuming from the "push button start" comment your vehicle has keyless entry and or ignition if so I would be more concerned in securing the OBD port to prevent thieves being able to program a new key / fob

You would be more likely to get the info your after on babyRR.com - The Range Rover Evoque Forum - http://babyrr.com/forum/ this is a forum that is dedicated to the evoque if you can't get your answer there the other forums in this Land Rover group have some very knowledgeable guys so you could also try Disco4.com or fullfatrr.com

 

[ruston]

Just to add , if you just upset the function of just one sensor, depending on it's function could have a knock on effect of the control system of it's interdependent process. At best , putting your vehicle into limp mode.
At worst a complete progressive shut down of the canbus system.
An extreme; on a car like yours there are sophisticated steering and braking controls that are interconnected, and the equipment you have will be of no use to you if you upset this function.
Thousands of pounds worth of diagnostic equipment is required to work on vehicles like this , some of it only available to the manufacturer.
The regulation is that vehicles have to have an OBD port , but manufacturers do not have to furnish full information . Dealerships usually will only have this equipment , and that is a very expensive visit.
Take the advice and spend a few quid , just in case.

 

[telectrix]

to quote UNG...

Also to complicate things further most of the recent Land Rovers I have worked on have 2 canbus systems

simple... 1 for when it works, and 1 for when it won't go.

 

[Steviecuk]

My theory on this (and I do understand that things would have advanced drastically since the day of my installs when I was younger) but my theory was if I put the relay on the same line as the fuse to the starter motor... then that line surely has been designed to accept that it may be switched off in case the fuse fails. You then replace the fuse and all works again (after diagnosing why it blew obviously but say it was a random surge and all ok).

(genuine question -->) How is putting a relay on that very same wire any different to the fuse being blown and being replaced? If a fuse blows, it don't (usually) mess up the whole CAN does it?

 

[Steviecuk]

Just to add , if you just upset the function of just one sensor, depending on it's function could have a knock on effect of the control system of it's interdependent process. At best , putting your vehicle into limp mode.
At worst a complete progressive shut down of the canbus system.
An extreme; on a car like yours there are sophisticated steering and braking controls that are interconnected, and the equipment you have will be of no use to you if you upset this function.
Thousands of pounds worth of diagnostic equipment is required to work on vehicles like this , some of it only available to the manufacturer.
The regulation is that vehicles have to have an OBD port , but manufacturers do not have to furnish full information . Dealerships usually will only have this equipment , and that is a very expensive visit.
Take the advice and spend a few quid , just in case.

I don't understand why it would be messing any sensors up, I would only be installing a relay inline with the starter motor power wire. ??

 

[Steviecuk]

Let me word it differently. If I go outside now and take the starter motor fuse out from under the bonnet and try and start the car, is the whole car going to go into melt down? (another genuine Q before I go and try it. )

 

[Steviecuk]

If you can run a Range Rover you can afford to pay an expert for this work.

Mate its 6 years old, its nothing special. And paying someone isn't the point, I like to do things myself and learn new things.

 

[DPG]

Let me word it differently. If I go outside now and take the starter motor fuse out from under the bonnet and try and start the car, is the whole car going to go into melt down? (another genuine Q before I go and try it. )

Is there a fuse purely for the starter motor?

I personally would use the advice given previously and try the range rover forum. Much more chance of getting an answer on there.

Do let us know - would be interesting to see if it is do-able or not.