Todays little task spiraled...............................
So to set the scene, bit of a yarn, The setup of the i.c.e. is there is a standalone DVD player in the glovebox runs the two screens in the headrests. it sends image and sound to them and the sound can be picked up via wireless headphones from the screen. The Audi headunit in the front doesn't have a video input as such, but it does have a TV input from back in the analogue days you could watch T.V, so theres a little mimic module that takes the dvd player output and turns it into a analogue tv signal and sends it to the Audi headunit and you can watch it on the front screen and sounds come out of all the speakers. On most VAG's when you turn the ignition on, the radio comes on, and when you turn the ignition off the stereo stays on UNTIL you take the key out of the ignition.
The DVD player and screens are on just a normal ignition live, turn the key in the ignition and they come on, turn it off and they go off. As you'd expect. A few problems with this 1, when you turn the ignition on and set up the dvd player for the kids, get it all in the right place and screens on, go to start it and it cuts the ignition live whilst cranking and then fires back up once its started, resetting the dvd player and screens all off. and 2, when you pull into the petrol station with the wife and kids and turn the igintion off every thing turns off, if they want to continue watching while i fill up then you have to have the full ignition on, blowers, full car electrics etc etc, plus it all resets when you go to start up again as in number 1.
So an easy solution hopefully, just run the dvd player off the same ignition live as the stereo (famous last words)
so turned this
into this
heres the anologue tv mimicer and all the dvd gubbings
after alot of searching i couldnt find any ignition lives behind the radio that stay on with the key in the barel, about an hour later i had a bit of a google and it turns out audis of this age and newer dont have an ignition live to them, they just have a big power and earth and everything else is controlled by CANBUS, thats what holds it on after the ignition is turned off. ******! i searched everywhere behind the dash for a key linked ignition live. no such luck
so then had to venture the other side
i figured even the CANBUS need to know the key is still in the ignition somehow so when right back to the source, the ignition barrel. and found a tiny little wire that did indeed have 12v with the ignition and didnt turn off intill the key was removed, and didnt cut out whilst cranking. finally!
the wire was pretty small and i can only imagine it goes straight to the central control module to give it a signal. so relays needed. when breaking previous audis i always cut out bits like the fusebox and relays incase i need them.
i found the same empty holes in my fusebox
so the plug slotted straight in the back
and an officail Audi TV relay slotted in
activated by tapping into the little feed in the back of the ignition barrel
So now i can drive up to the petrol pumps with everything playing, turn the ignition off but leave the keys in the ignition and everything carrys on playing with out disruption, fill up, come back in and start it up, again without disruption, and drive away with two happy kids
so with the ign off but key still in, dvd stays playing
horray, something that no one else will ever notice just taken 5 HOURS!!!! but at least the kids are happy :lol:
my mate turned up in his tdi work bus so too a few pics for comparison