Quote:
Originally Posted by deepblonde
A guide and picture would be great! 
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There you go...at least a picture of the work. The relay is on the left with green/yellow/white wires. Basically I set it up the way that the new relay is powered by the relay of the rear defroster, which gets power only when you turn the key. If i remember right, the white color wire of the relay is supposed to be connected to "-" and the yellow one is "+" which i got from the rear defroster underneeth the green relay.
Once activated the relay closes the connection between the green wires which I connected with the stock fuse source (red cable) and powers the TCU unit. Obviously i installed a 10A fuse on the red cable....
It's not the cleanest of solutions but it's 100% reversible in any moment - that was my priority.