Please refer back to posts on page 4 and 5 before even taking the effort to modify your unit as this has been discussed before. Thanks for response. I spent quite a lot of time reading pages 4-5 and accept the solution maynot work with the 2007 SAT Nav CD stack Aurions. BUt as my HU appears identical to the NON-SatNav version - I'm keen to persist and give it a crack. In all the correspondence, its not clear to me which of the plugs on the HU is the "F6" for the F8-19(AUXI) to F6-7(GND), another words where do I plug "....the lonely black wire onto ground on plug (F6-7)" as stated on page 1 of shane_scott_85 initial. I'm really keen to get this going - and will of course share all.