06 Evo 9

Recently brought a digital dash, been told to wire it into accessories to avoid a double start up of the dash as its not good for the internal SD card that sits inside however I realise when we start our evos, as we crank our engines all our accessories lose power regardless meaning the dash would go through a double start up regardless. The only other solution I can think of is looking for a 12V thats ONLY live after the car is cranked/running and nothing before that.

Any one got any suggesstions?

 

You need to wire it up to the IG1 circuit. As you can see by the attached page from the FSM, that is the only circuit that stays active through the cranking process.




EDIT: This is from the Evo 8 Factory Service manual so the wiring color might be different for the 9. Otherwise the circuit should be the same.

 

Thank you taking your time answer back, although you mention that im suppose to wire it up to the IG1 circuit, im still confused as to where im suppose to tap as I have 0 idea on how to read this diagram. In laymen terms, could you explain where I can tap into please?

 

The where and how are highly subjective. I don't know what your skill level is with electrical, what the install parameters are, what your budget is, what kind of operating environment the car will be in, What else you already have installed, etc. So the only real recommendation I can make is that you have your electronics professionally installed. Digital dashes are pretty expensive and so is your cars electrical system. I know you want this to be reliable and not introduce any new issues/entropy into your cars electrical system. Don't get me wrong, if you really want to DIY it its totally possible, its just a matter of what you know and what you have in terms of electrical skills and tools. Do you have/know how to use a DMM, do you know how to trace out circuits, do you know how to read circuit diagrams, how familiar are you with ohms law, how comfortable are you with dismantling your interior, do you have tools for wire stripping and crimping, how comfortable are you working out of position upside down under your dash? etc..

I've been in the automotive electrical business for a long time and I have seen some true horror shows, so that's where I'm coming from with my advice. Electrical mistakes can be very costly and dangerous, even life threatening. So a certain amount of humility is required when considering the appropriate course of action. Any deficit on your part in regards to my questions can be remedied with time, money, and effort. It's up to you to decide how you want to approach this. Maybe someone else will come along and give you a "tap this here" answer and that's fine if they want to do that. I am trying to help you and anyone else reading this think about this kind of install on a more meta level when approaching this kind of project.

TLDR
You can download the factory service manual from the evoscan website and get all the factory circuit diagrams and device locations from there. The manual describes how to read the circuit diagrams. The picture I posted is at the highest level of the branch you should start considering for a place to interface with the factory system. You see it branches out into 5 different subsystems (One unpopulated). There are circuit diagrams and device locations for each of those subsystems and you could potentially tap into any of those sub-circuits depending on the install parameters. Depending on how much additional power you are going to be drawing you might need to use a relay instead of drawing directly from the factory wiring. Any circuits you add need an appropriately sized fuse for safety.