Thread: 04+ HUD Install

Originally Posted by Very Lost

Oh sorry you said nav radio stuff i don't know anything about that

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Yeah, to be clear, there is a way to get the signal from the nav to the bcm, but I'm not sure how to do that. I know the bcm is passing the DIC signal to the HUD, so its not a bcm issue. Some connection needs to be made so that the nav/audio unit gets the proper signal for turn-by-turn directions and radio info to the HUD. There will be a connection from the XM harness on the nav unit, and I assumed it would go to the vehicle speed signal wire connection, but there are 4 wires going into the bcm that are the same color (green) as the vehicle speed signal input wire. I may have got the wrong one. I'll figure it out at some point.