ihf1000 in 2004 range rover

does anyone know how to find the navigation mute wire for the radio or is there a mute wire i can use to help with the install

if your doing a blue tooth the easiest way would be to hook up the parrot to the front spkrs that arent crossed over(im not sure how its set up)i would just hook the two front its just a cell phone anyway. then use your negative mute output, hook up a relay to cut the main power to the factory amp that way it will mute all sound. make it easy on yourself.