Bluetooth retrofit power question
I'm hoping for a quick response on this one because although I've lived with it since I retro'd bluetooth, I'm selling the car this weekend and want to fix this issue for the new buyer.
Essentially, I retro'd bluetooth with help from a techie friend of mine and it works great. Now, as far as I can remember, we took power from the RNS-E which is powered without the key in the ignition.
So, when I leave the car for more than two days, the BT unit drains the battery and I have to jump start the car (not good I know so once it had happened twice and I realised what I'd done I started removing the BT unit when I knew I wouldn't be using the car for a day or so).
So, to all you retrofitters out there; when I dismantle everything tomorrow, where should I take a live feed from so that I can be sure the BT unit will only power up when the ignition is turned on?
I hope I've made sense!
thanks in advance...